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proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 1 of 37 all rights reserved check for latest datasheet march 2016 iqs2 3 1 datasheet single channel capacitive proximity/touch controlle r for sar applications features ? pin compatible with iqs127/128/227/228 /211 ? replacement solution for the iqs128 to meet sar regulations (failsafe & long - term activation testing) and improve performance ? improved iqs128 dycal tm operation with quick release detection for improved sar safety ? human detection options for start - up detection and improved user experience ( non - default, fcc approval pending) ? 1.75v to 3.6v input voltage , trimmed to use proximity detection with 1.8v digital interface ? external threshold adjustment pin (minimize need for pre - empted otp adjustments) ? m inimal external components (dire ct input strap ) ? s tandalone failsafe mode ( backwards compati ble failsafe output , short pulses on output to indicate operational device ) ? default otp options focus on safety and passing sar lab qualification , otp changes offer performance advantages ? quick release detection C effectively prevent false triggers ? quick r elease sensitivity options ? projected capacitive sensing option (self - capacitance by default) ? i2c interface option (improved compatibility) ? extended controls in i 2 c mode (setup in i 2 c, runtime with standalone output) ? hand - held power on detection ( safety back - off feature using user interaction ) ? optional input for synchronized implementations ( input to instruct ic when to sense ) ? synch ronization output C failsafe pulses may be used by the master to synchron ize on. sensing is done after each pulse ? synchronization input C sensing is on ly done while sync input is low ? low power sensing: 30 hz (default), 10 0hz ? c onstant sampling rates during all power modes with rapidly debounced output changes applications ? sar sensor ? integrated hybrid designs (rf and capacitive sensing combined) ? movement sensing applications (user interaction detection, anti - theft) ? hold detect ion for screen activation ? on - ear detection 6 pin tsot23 - 6 representations only, not actual markings rohs2 compliant t a tsot23 - 6 - 40 c to 85 c iqs231
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 2 of 37 all rights reserved check for latest datasheet march 2016 table of contents 1 summary: packaging a nd pin - out ................................ ................................ ................................ .............. 4 2 summary: one - time - programmab le (otp) options ................................ ................................ ................. 5 3 summary: programming reference (i 2 c memory map) ................................ ................................ ........... 6 4 summary: features ................................ ................................ ................................ ................................ ........ 7 p in compatibility ................................ ................................ ................................ ................................ .............................. 7 dycal / q uick release ................................ ................................ ................................ ................................ ...................... 7 u ser interface select ion ................................ ................................ ................................ ................................ ................... 7 m ovement detection ................................ ................................ ................................ ................................ ....................... 8 s ensitivity adjustmen t ................................ ................................ ................................ ................................ ...................... 8 f ailsafe heartbeat ................................ ................................ ................................ ................................ ............................ 8 h igh configurability ................................ ................................ ................................ ................................ ........................ 8 s witch i 2 c to standalone ................................ ................................ ................................ ................................ ................. 8 s elf / p rojected s ensing ................................ ................................ ................................ ................................ ................... 9 h and - held detection durin g power - on ................................ ................................ ................................ ............................. 9 s ync input ................................ ................................ ................................ ................................ ................................ ........ 9 a utomatic tuning (ati) ................................ ................................ ................................ ................................ .................... 9 r eference signal beha viour ................................ ................................ ................................ ................................ .............. 9 i mproved i 2 c interface ................................ ................................ ................................ ................................ ..................... 9 5 features: extended d etails ................................ ................................ ................................ ......................... 10 5.1 ati (a utomatic t uning i mplementation ) ................................ ................................ ................................ ........... 10 5.2 s ensitivity adjustmen t ................................ ................................ ................................ ................................ ...... 10 6 recommended sar conf igurations ................................ ................................ ................................ ........... 11 6.1 iqs128 replac ement configuration ................................ ................................ ................................ .................. 11 6.2 f ull feature configur ation ................................ ................................ ................................ ............................... 12 6.3 s hared electrode with rf antenna ................................ ................................ ................................ .................... 12 6.4 i 2 c setup with standalon e output in runtime ................................ ................................ ................................ ..... 13 7 i 2 c programming guide (summary) ................................ ................................ ................................ ........... 14 7.1 a dd i2c connection ................................ ................................ ................................ ................................ .......... 14 7.2 i2c command structure ................................ ................................ ................................ ................................ .... 15 7.3 c ontrol b yte ................................ ................................ ................................ ................................ .................... 15 7.4 t est mode ( address 0 x 45) ................................ ................................ ................................ ................................ .. 15 7.5 i2c typical setup ................................ ................................ ................................ ................................ ............... 16 7.6 i2c read (e vent register ) ................................ ................................ ................................ ................................ ... 16 8 configuration option s ................................ ................................ ................................ ................................ 17 8.1 otp d etails : b ank 0 ................................ ................................ ................................ ................................ .......... 18 m ovement time - out ................................ ................................ ................................ ................................ ....................... 18 m ovement threshold ................................ ................................ ................................ ................................ ..................... 18 q uick release thresho ld ................................ ................................ ................................ ................................ ................. 18 q uick release beta ................................ ................................ ................................ ................................ .......................... 18 8.2 otp d etails : b ank 1 ................................ ................................ ................................ ................................ .......... 19 f ilter halt threshold ................................ ................................ ................................ ................................ ..................... 19 p roximity t hreshold ( low / hig h ) ................................ ................................ ................................ ................................ .... 19 ac f ilter ................................ ................................ ................................ ................................ ................................ ........ 19 h and - held power on detect ion ................................ ................................ ................................ ................................ ...... 19 t ouch thresho ld ................................ ................................ ................................ ................................ ............................ 19 8.3 otp d etails : b ank 2 ................................ ................................ ................................ ................................ .......... 19 t arget ................................ ................................ ................................ ................................ ................................ ........... 20 b ase value ................................ ................................ ................................ ................................ ................................ ..... 20 f ailsafe ................................ ................................ ................................ ................................ ................................ .......... 20 q uick release ................................ ................................ ................................ ................................ ................................ . 21
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 3 of 37 all rights reserved check for latest datasheet march 2016 u ser interface ................................ ................................ ................................ ................................ ............................... 21 8.4 otp d etails : b ank 3 ................................ ................................ ................................ ................................ .......... 23 p rojected sensing ................................ ................................ ................................ ................................ .......................... 23 io2 function ................................ ................................ ................................ ................................ ................................ .. 23 ic mode ................................ ................................ ................................ ................................ ................................ .......... 23 s ample rate ................................ ................................ ................................ ................................ ................................ ... 23 9 full programming ref erence ................................ ................................ ................................ ..................... 24 10 specifications ................................ ................................ ................................ ................................ ................ 30 10.1 a bsolute maximum rati ngs ................................ ................................ ................................ ............................... 30 11 package information ................................ ................................ ................................ ................................ .. 33 11.1 tsot23 - 6 ................................ ................................ ................................ ................................ ......................... 33 11.2 d evice packaging conv ention ................................ ................................ ................................ ............................ 34 11.2.1 top ................................ ................................ ................................ ................................ .......................... 34 11.2.2 bottom ................................ ................................ ................................ ................................ .................... 34 11.3 msl l evel ................................ ................................ ................................ ................................ ......................... 34 12 ordering and part - number information ................................ ................................ ................................ 35 12.1 o rdering i nformation ................................ ................................ ................................ ................................ ...... 35 12.2 d evice n umbering c onvention ................................ ................................ ................................ .......................... 35 13 revision history ................................ ................................ ................................ ................................ ............ 36 appendix a contact information ................................ ................................ ................................ .................. 37
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 4 of 37 all rights reserved check for latest datasheet march 2016 1 summary: packaging and pin - out figure 1 . 1 iqs 231 pin - out (tsot23 - 6 package ) table 1 . 1 pin - out descri p tion iqs231 in tsot23 - 6 pin name type function 1 primary i/o digital input/output multifunction io1 / scl (i 2 c clock signal) 2 vss signal gnd 3 seco ndary i/o / tx digital input/output multifunction io 2 / sda (i 2 c data output) / tx 4 vreg regulator output requires external capacitor 5 vddhi supply input supply:1. 75 v C 3.6v 6 cx sense electrode connect to conductive area intended for sensor table 1 . 2 multifunction pin descriptions multifunction pin name multifunction pin option io1 proximity output / proximity output with heartbeat io2 sensitivity input / synchronization input / movement output / to uch output figure 1 . 2 iqs231 reference schematic iqs 231 io1 / scl vss io2 / sda / tx cx / rx vddhi vreg 1 2 3 6 5 4 gnd c1 220nf gnd c2 100pf c4 100pf c3 1uf gnd vddhi gnd cx vin vddhi gnd r1 470r gnd vddhi configure these resistors for iqs231 i2c operation. pin3: iqs231 sda pull-up pin1: iqs231 scl pull-up r2 4.7k r3 4.7k vddhi io2/sda gnd io1/scl io2/sda/tx optional: led and current limiting resistor pin1: output led and current limiting resistor on primary output vddhi r4 1.0k ds1 blue io1/scl io1/scl io1/scl io1/scl io2/sda/tx io2/sda/tx c5 4.7pf gnd lk1 2w-slink open io2/sda/tx 3 io1/scl 1 vreg 4 cx/rx 6 vss 2 vddhi 5 u1 iqs231 option: sensitivity input gnd for more sensitivity component min recommended max c1 180nf 220nf 330nf c5 dnp 4.7pf (max recommended) 60pf 200pf
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 5 of 37 all rights reserved check for latest datasheet march 2016 2 summary: o ne - time - programmable (otp) options otp bank 0 iqs231 000000 xx tsr bit7 6 5 4 3 2 1 bit 0 movement time - out movement thre shold quick release threshold quick release beta prox no mov ui 00 - 2s 01 - 5s 10 - 10s 11 - disabled ( 0s) prox&mov uis 00 - 10s 01 - 30s 10 - 60s 11 - 10min 00 C 4 counts 01 C 6 10 C 8 11 C 10 00 C moderate 100 counts 01 C strict 150 10 C relaxed 50 11 - very strict 250 00 C 2 (fast following) 01 - 3 10 - 4 11 C 5 (slow following) otp bank 1 i qs231 0000 xx 00 tsr bit7 6 5 4 3 2 1 bit 0 filter halt threshold proximity threshold (low/high) ac filter hand - held power on detection touch threshold 0 C 3 counts 1 C 6 filter halt time - out fixed at 5 seconds sensitivity input low / sync input active / mov output / touch output 0 C increased 1 C normal 0 C disabled 1 C enabled 00 C 32 counts 01 C 64 10 C 256 11 C 320 000 C 20 counts 001 C 28 010 C 36 011 C 44 100 C 5 2 101 C 68 110 C 68 111 C 132 sensitivity input high (internal 20k? pull - up) 000 C 40 counts 001 C 56 010 C 72 011 C 88 100 C 10 4 101 C 1 3 6 110 C 1 95 111 C 264 otp bank 2 iqs231 00 xx 0000 tsr bit7 6 5 4 3 2 1 bit 0 reserved target base value failsafe quick release user interface n/a 0 = 1200 / 1096 (movement) 1 = 768 00 C 100 counts 01 C 75 10 C 150 11 C 200 0 C disabled 1 C enabled 0 C enabled 1 C disabled 00 - prox / no movement 01 - prox with movement 10 - prox with movement / touch with no movement 11 - same as '10', touch output forced on io2 ot p bank 3 iqs231 xx 000000 tsr bit7 6 5 4 3 2 1 bit 0 reserved p rojected sensing io2 function ic mode reserved sample rate n/a 0 C self capacitance 1 C projected capacitance 00 - sensitivity input (proximity threshold adjust) 01 - sync input 10 - movement output 11 - ignore input, no output 0 C standalone 1 C i 2 c sample - to - sample tim e (r esponse time ) includes 6 sample debounce burst of 24ms 0 C 30 hz (57ms) 1 C 100 hz (34ms) recommended base configurations : iqs128 replacement: iqs231 00000000 tsr | full featured: iqs231 000a0 600 tsr | shared electrode: iqs231 08 0 00000 tsr | i 2 c mode (optional: jump to standalone): iqs231 04000000 tsr
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 6 of 37 all rights reserved check for latest datasheet march 2016 3 summary: programming reference ( i 2 c memory map ) i2c communications layout address/ command/ byte register name/s r/w default value bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 xxh main_events r n/a debug sensing disabled warm boot cold boot release touch prox each read instruction returns main_events byte as first byte, followed by the data at the specified addre ss 00h product_number r 0x40 0x40 01h software_version r 0x0 4 0x04 02h debug_events r n/a reserved ati_error ch0_ati reserved quick release exit mov detect enter mov detect movem ent 03h events_enabled r/w 0x03f reserved debug sensing disabled warm boot cold boot release touch prox 04h commands r/w 0x00 ati_ch0 disable sensing enable sensing toggle ac filter toggle movement algor ithm toggle ulp mode toggle event mode warm boot 05h otp bank 1 r/w 0x00 filter halt proximity threshold read only ac filter hand - held power on detection touch threshold read only 06h otp bank 2 r/w 0x00 reserved target base value failsafe quick release user interface selection 07h otp bank 3 r/w 0x00 reserved reserved projected sensing io2 function ic mode (standalone / i2c) reserved sample rate 08h quic k release r/w 0x00 quick release threshold lut quick release beta 0xc = 500 0xd = 750 0xe = 850 0xf = 1000 0x8 = 75 0x9 = 200 0xa = 300 0xb = 400 0x4 = 10 0x5 = 20 0x6 = 25 0x7 = 30 0x0 = 1 0 0 0x1 = 1 5 0 0x2 = 50 0x3 = 250 09h movement r/w 0x30 (2s, 4) filter halt time movement threshold = (value 2) + 4 available range: 4 C 34 0xc = 10min 0xd = 30min 0xe = 60min 0xf = 90min 0x8 = 30s 0x9 = 1min 0xa = 2min 0xb = 5min 0x4 = 4s 0x5 = 5s 0x6 = 10s 0x7 = 20s 0x0 = 0s 0x1 = 0.5s 0x2 = 1s 0x3 = 2s 0ah touch threshold r/w 0x07 (32) touch threshold = (value 4) + 4 available range: 4 C 1024 0bh proximity threshold r/w 0x0 0 reserved reserved proximity threshold = ( otp value +1 ) x 4 x2 if io2 is high in standalone available range: 20 C 1 3 2 (io2 low) ava ilable range: 40 C 264 (io2 high) 0ch reserved r/w n/a n/a 0dh ch0 multipliers r/w n/a reserved reserved ch0 sensitivity multiplier ch0 compensation m ultiplier 0 C 3 0 C 15 0eh ch0 compensation r/w n/a 0 C 255 0fh ch1 multipliers r/w n/a reserved reserved ch1 sensitivity multiplier ch1 compensation multiplier 0 C 3 0 C 15 10h ch1 compensation r/w n/a 0 C 255 11h system flags r n/a ac filter active reserved ch1_active reserved ch0_lta_halted ati_mode zoom mode 12h ui flags r n/a reserved ulp_mode reserved hand _held pwr on quick_release reserved output active 13h ati flags r n/a reserved 14h event flags r n/a ch1_ati error reserved ch1 movement ch0_ati error ch0 undebounced ch0_ touch ch0_prox 15h ch0 acf_h r n/a proximity channel: filtered count value 0 C 2000 16h ch0 acf_l r n/a 17h ch0 lta_h r n/a proximity channel: reference count value (long term average) 0 C 2000 18h ch0 lta_l r n/a 19h ch0 qr d_h r n/a proximity channel: quick release detect reference value 0 C 2000 1ah ch0 qrd_l r n/a 1bh ch1 acf_h r n/a movement channel: filtered count value 0 C 2000 1ch ch1 acf_l r n/a 1dh ch1 umo v_h r n/a movement channel: upper reference count value 0 C 2000 1eh ch1 umov_l r n/a 1fh ch1 lmov_h r n/a movement channel: lower reference count value 0 C 2000 20h ch1 lmov_l r n/a 21h halt_t imer_h r n/a countdown timer to give active feedback on the time - out. movement events will reset this timer (0 C 255) 100ms | timer range: 0 C 90min 22h halt_timer_l r n/a 23h timer.ati_ch0 r n/a countdown timer to give activ e feedback on the time until re - calibration is attempted after ati - error (0 C 255) 100ms | timer range: 0 C 25s 24h timer.ati_ch1 r n/a countdown timer to give active feedback on the time until re - calibration is attempted after ati - error (0 C 255) 100ms | timer range: 0 C 25s
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 7 of 37 all rights reserved check for latest datasheet march 2016 4 summary : features pin compatibility many older designs using the iqs128 will benefit from a drop - in replacement on a production device for evaluation. dycal / quick release a dycal - type implementati on (referring to dynamic threshold calibration) is recommended as main stability feature for the latest sar user interface. passing the device sar qualification with this type of interface has been proven successful. quick release detection is the impro ved dycal - type implementation and focusses on a release characteristic within a time window. movement features add a second level of protection against stuck conditions with the quick release detection. the quick release will be detected on the proximity channel (not the secondary movement channel) and the signal slope will be monitored to enable the quick release. a single action from a touch/proximity state will trigger the quick release event and the event will only remain as long the proximity state h olds. ui user interface selection the device offers 3 main uis intended for sar use. these are: ? proximity ui, no continuous movement sensing ? proximity ui, continuous movement sensing ? proximity & touch ui, continuous movement sensing during proximity, no movement sensing during touch (no time - out during long duration stationary sar tests) in all cases the use of the quick release feature is recommended to prevent typical non - human activations from remaining. in all cases no movement and movement sensing refers to the capacitive movement sensing during normal activation. hand held detection and quick release features will enable movement sensing with a no - movement time - out, irrespective of which ui is selected.
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 8 of 37 all rights reserved check for latest datasheet march 2016 summary: features (continued 1 ) m ovement detection movement detection is designed to function as human presence detection in a localized area. this device cant be used to fulfil an accelerometer function (g - sensor function). human presence detection requires an exception in sar testing because the qualification testing only uses stationary phantom bodies. optimized human detection is offered through an integrated separate channel, dedicated towards human detection. sensitivity adjustment default input use: internal pull - up (20k?) by default, tie directly to gnd for more sensitive option. apart from the simple external adjustment, an external capacitor is recommended for sensitivity adjustments. 1pf is considered a small change in sensitivity, while 10pf changes are considered large. a maximum of 60pf load is recommended for effective proximity sensing. failsafe heartbeat a single pulse of 500 s is integrated on io1. this pulse is the failsafe heartbeat , sent on each sensing event . this pulse will be sent during th e stabilize time as shown in figure 8 . 1 . the failsafe indicator signal will precede the conversions (sampling). the failsafe signal will be repeated during burst mode in order to offer synchronization output to t he master, indicating exactly when sensitive measurements are done. measurement times have a fixed maximum which the user can implement. the failsafe signal is disabled by default and may be enabled via otp option or i 2 c initialize with standalone setup. through i 2 c the iqs231 can be used in many different ways and the configuration can be updated during later stages of development than with the otp route. switch i 2 c to standalone configure the device via a dedicated i 2 c type connection and switch to any standalone mode for runtime operation. this minimises the processor load and spurious content from communication signals. the failsafe heartbeat is integral to detecting an unexpected reset event. when the heartbeat disappears, default state is assume d and the master device should reconfigure the device through i 2 c. high configurability iqs 231 1 2 3 6 5 4 io2 vddhi more sensitive cx io1 vreg iqs 231 1 2 3 6 5 4 io2 vddhi vss less sensitive iqs 231 1 2 3 6 5 4 io2 vss vddhi vss more sensitive cx cx io1 io1 vreg vreg io1 cx iqs 231 1 2 3 6 5 4 io2 vddhi cx io1 vreg iqs 231 1 2 3 6 5 4 sda vddhi cx scl vreg
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 9 of 37 all rights reserved check for latest datasheet march 2016 summary: features (continued 2 ) self / projected sensing projected is offered for future implementations with advantages in proximity detection for sar and on - ear. electrode design is a major design element in such application. projected sensing is permanently disabled when i 2 c mode is chosen . hand - held detection during power - on movement detection information will be used for power - on safety detection . during the start - up period, the thr eshold detection cannot be accurately used due to calibration at this time. human movement characteristic s are used as an alternative. a touch event is considered a more substantial indication of actual threshold trigger and therefore this will clear the h and - held detection state when a proximity & touch ui is selected . sync input in order to ensure a stable sensing environment, sensing may be done in strategic time windows controlled by a master device. automatic tuning (ati) the automatic tuning impleme ntation (ati) ensures optimal sensitivity during runtime for various sensor environments. two channels are calibrated (prox imity channel and movement channel). both run on the same cx pin in different time slots . an ati - block time is defined to prevent re - ati loops during touch release events. the ati - bl ock is fixed for the movement channel, and fixed for the standard touch/prox imity channel reference signal behaviour long - term - average (lta: signal reference) behavior is optimized for sar where trigger te sts are important in product qualification. the lta will therefore be slow while still able to prevent typical temperature drift from causing activations. improved i 2 c interface standard i 2 c polling for: ? debugging & normal use ? device polling optimized f or guaranteed response (within t clk_stretch C clock stretching will be applied to the bus scl line)
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 10 of 37 all rights reserved check for latest datasheet march 2016 5 features: extended details 5.1 ati (automatic tuning implementation) external sensor connections are calibrated in the following ways: ? power on reset (proxi mity channel is calibrated at each por) ? movement channel is only calibrated with por when hand - held detection is enabled ? proximity & movement channel is calibrated when the reference is out of bounds (1/8 of target counts). the reference of the proximity c hannel is rapidly adapted when capacitance moves away from the trigger threshold or when an automatic reseed is done (reseed: reference = actual sensor value). the reference of the movement channel is rapidly adapted in any direction of capacitive change s. ? redo - ati of the proximity channel can be initiated by the user in i 2 c mode using an i 2 c command. during each proximity channel ati event, the proximity output is activated to indicate the event and ensure a safe output during the event and in the case o f an ati - error. known issues: when 125 khz charge transfer frequency selected for large capacitive and resistive loads, the calibration has instability around the ati boundaries. 5.2 sensitivity adjustment apart from the simple external adjustment, an externa l capacitor is recommended for sensitivity adjustments. 1pf is considered a small change in sensitivity, while 10pf changes are considered large. a maximum of 60pf load is recommended for effective proximity sensing.
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 11 of 37 all rights reserved check for latest datasheet march 2016 6 recommended sar configurations config uration n ame configuration details iqs128 replacement iqs231 000000 00 tsr backwards compatible / with quick release full - feature (base) iqs231 000a06 00 tsr touch threshold, hand - held power on detect, quick - release , f ailsafe, prox&touch ui, full - feature (no failsafe heartbeat) iqs231 000206 00 tsr touch threshold, hand - held power on detect, quick - release, prox&touch ui shared electrode iqs231 08 0 00000 tsr s ynchronization input i 2 c mode iqs231 04000000 tsr i 2 c enabled see below sections for details on r ecommended configurations. 6.1 iqs128 replacement configuration the iqs128 replacement mode i s the default otp configuration: ? dycal release is replaced with the quick release (enabled by default) ? the available input (io2) may be used floating ( has internal pu ll - up) o float / pull high: less sensitive proximity threshold of 8 counts o s horting this pin to gnd : m ore sensitive proximity threshold of 4 counts. ? the default base value of the iqs231 is decreased (100 compared to iqs128 @ 200) to give more sensitivity for a lower target count o add a larger cx capacitance if this sensitivity boost is applied in an environment with a low signal - to - noise ratio . ? the default quick release settings make the feature function to wards the safe side. a design with 20mm trigger distan ce should activate the feature if a quick release action is done from a deep touch on the electrode. ? reference part number: iqs231 00000000 tsr
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 12 of 37 all rights reserved check for latest datasheet march 2016 6.2 full feature configuration with the standalone mode using movement, all important features of the iqs231 are r ecommended to enable: ? enable hand held detection: this feature offers improved user protecting when powering up the device in - hand. ? enable failsafe output: this feature will place short pulses on the output which can easily be ignored by a debounce algorit hm and detected by an interrupt. when failsafe pulses disappear, the output iqs231 output should be ignored and the device should enter a safe state. ? enable the proximity & touch ui with movement. this ui will effectively time - out when a proximity state is activated, but with no user interaction (device placed on table / in bag etc.). when in a touch state, no time - out will occur . this time - out blocking is beneficial for the long term sar qualification testing. ? when the touch ui is enabled the touch level b ecomes active. select a touch threshold ? keep quick release enabled. the feature will improve user experience with a quick 2 second no - movement time - out. the time - out is fixed (2 sec) when any proximity & movement ui is chosen. ? reference part number: iqs231 000a06 00 tsr (or iqs231 000206 00 tsr no failsafe heartbeat ) 6.3 shared electrode with rf antenna when using the device in an advanced implementation using the rf antenna as sensing electrode, the following settings are recommended: ? e nable the synchronization input to take control of when sensing is allowed (pull io2 low) and when sensing is paused (io2 high with internal pull - up). this feature may be used to multiplex rf transmit, receive and capacitive sensing. sensing requires a minimum io2 low time of 10ms to do a proper charge transfer. the proximity threshold will default to the low option. ? use the mode described next: i 2 c setup with standalone output in runtime. this mode will ensure full control of settings while offering a connection to the rf module without the frequency harmonics produced by i 2 c communications. ? reference part number: iqs231 08 0 00000 tsr
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 13 of 37 all rights reserved check for latest datasheet march 2016 6.4 i 2 c setup with standalone output in runtime for full control of the settings, an i 2 c device may be used (i 2 c enabled with otp) to do the ic setup, while runtime offers a standalone output. the advantage is that detailed settings can be flexible and determined separately from the procurement phase (otps are required to be fixed early enough to satisfy the lead - time for an otp - specific solution). detai ls about this mode are as follows: ? from about 20ms from power - up, the device may be polled by address. ? the device will acknowledge the correct address within about 5ms from any r/w event (expect clock stretching during iqs231 wake - up) ? send write commands v ia i 2 c until all the required settings are written ? send the mode switch bit ic mode - > standalone only after all settings are written. after writing this setting, the next i 2 c stop sent will automatically instruct a soft reset to put the ic in standalo ne mode, keeping all the settings written through i 2 c. a soft reset will also ensure that a recalibration is done. ? quick reference to switch modes: clear register 0x07 (otp bank 3) bit 2 to enter standalone mode. ? reference part number: iqs231 04000000 tsr
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 14 of 37 all rights reserved check for latest datasheet march 2016 7 i 2 c programming guide (summary) the iqs231 device interfaces to a master controller via a 2 - wire (sda and scl) serial interface bus that is i 2 c tm compatible , with a maximum communication speed of 400kbit/s. the protocol acknowledges an address request in dependently. the i 2 c hardware module is awake for address recognition while the iqs231 is in sleep mode, giving the ability to wake the device at any time and effectively communicate via serial interface. this is different compared to other ultra - low power azoteq solutions where the communications module also sleeps during standard ic sleep times. repeated polling requests where required in such case. 7.1 add i2c connection when using i 2 c mode, ensure the connections as shown in figure 1 . 1 . internal pull - up resistors are sufficient for communication speeds up to 100kbits/s with low capacitance on the lines (<15pf). for 400kbit/s , be sure to place pull - up resistors (4.7 k ? recommended)
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 15 of 37 all rights reserved check for latest datasheet march 2016 7.2 i2c command structure by writing to address 0x04, commands can be sent to the device. the commands are as follows: table 7 . 1 i 2 c command structure reg 0x04 bit name description toggle (yes/no ) 0 warm boot soft reset, all registers remain as written, ui resets no 1 reserved n/a n/a 2 ulp mode ultra low power mode enable (512ms) yes 3 reserved n/a n/a 4 ac filter toggle between option available in otp yes 5 disable sensing disables all con versions no 6 enable sensing enable capacitive sensing no 7 ati ch0 perform re - calibration on proximity channel no 7.3 control byte the control byte indicates the 7 - bit device address (44h default) and the read/write indicator bit. the structure of the con trol byte is shown in figure 7 . 1 . figure 7 . 1 iqs231 control byte the i 2 c device has a 7 bit slave address (default 0x 4 4h) in the control byte as shown in figure 7 . 1 . to confirm the address, the software compares the received address with the device address. sub - address values can be set by otp programming options . the iqs231 has no alternate slave address options. 7.4 test mode ( addr ess 0x45 ) during the power - on period (approx. 20ms), the device will respond to polling requests on address 0x45 (test - mode address). test - mode is used during ic production and otp configuration. with another device on the i 2 c bus with address 0x45, power - up sequence and communication timing should be considered. r / w 1 0 0 0 1 m s b l s b 7 b i t a d d r e s s i 2 c g r o u p s u b - a d d r e s s e s 0 0
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 16 of 37 all rights reserved check for latest datasheet march 2016 7.5 i2c typical setup the typical i 2 c setup would adjust the following registers: ? quick release beta ? quick release threshold ? movement threshold ? touch threshold ? proximity threshold ? filter halt time ? us er interface ? ic mode the rest of the settings will only require adjustment with specific requirement. 7.6 i2c read (event register) each i2c read will always return the event register as the first byte. when reading from a specific register (write address befo re read), 2x reads should be done. see memory map first line for detail on the event register .
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 17 of 37 all rights reserved check for latest datasheet march 2016 8 configuration options the iqs231 offers various user selectable options. these options may be defined via i 2 c setup or one - time programmable ( otp) configuratio n. otp configured devices may be ordered pre - programmed for bulk orders or in - circuit programming techniques may be implemented during the product testing phase. i 2 c setup allows access to all device settings while enteri ng direct output mode when selected by the mcu. azoteq offers a c onfiguration tool (ct2 1 0 or later) and associated software that can be used to program the otp user options for prototyping purposes. for further information regarding this subject, please contact your local distributor or sub mit enquiries to azoteq at: proxsensesupport@azoteq.com
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 18 of 37 all rights reserved check for latest datasheet march 2016 8.1 otp details : bank 0 movement time - out ( bit 7:6) when no movement is detected within a time period, a movement time - out occurs . the reference is halte d until the timer clears. after the timer clears, the reference signal is made equal to the actual signal, nullifying any signal delta that may have caused a proximity or touch event. the timer is reloaded with every movement event detected. movement thre shold ( bit 5:4) a low count threshold region is defined for a movement signal internally stored. movement characteristics accumulate and triggers as soon as it reaches the threshold. the accumulated effect is nullified and accumulation is restarted in orde r to detect the next possible movement event. quick release threshold ( bit 3:2) the quick release feature will operate according to the parameters as specified in: ? dycal / quick release definition ? quick release beta ? quick release threshold the quick release threshold defines the trigger point for the feature where the counts deviate from a quick release moving average in a certain direction. the direction is determined by the pro jected sensing enabled/disabled bit: ? with projected disabled (default) the direction is with increasing counts ? with projected enabled the direction is with decreasing counts quick release beta ( bit 1:0) the quick release beta forms part of the quick relea se feature and is the filter intensity of the reference value which follows the actual counts. the quick release is triggered according to the difference between this reference value and the actual counts. when this value is large, the quick release will t rigger for a variety of release types from slow to fast releases. when this value is small, the quick release will only trigger for fast releases.
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 19 of 37 all rights reserved check for latest datasheet march 2016 8.2 otp details : bank 1 filter halt threshold (bit 7) the filter halt is a separate threshold that is intended to be more sensitive than the proximity threshold. while in no proximity detected state, the reference of the iqs231 will follow the actual signal to prevent environmental effects such a temperature drift. a filter halt feature is implemented to freeze t he reference and allow slow proximity trigger approaches to still be effective without adapting. the time - out is t filter_halt when a filter halt does not result in a proximity event. proximity threshold (low/high) (bit 6:4) by default this is the only tr igger threshold in the system (touch also threshold available) . the threshold is adjustable in actual counts values (count values can be seen when streaming i2c value through the iqs231 gui). the threshold is the amou nt of counts the actual signal falls be low (projected disabled) | rises above (projected enabled) the reference signal (long - term average) in the default configuration th e input pin io2 will be active. io2 = vss will enable the chosen option in the otp ( 20 - 1 32 counts) io2 = vddhi ( 40 - 264 count s) the system will default to the io2 = vss option when sync input or movement output is enabled. ac filter (bit 3) incoming samples are filtered by default. this option gives the ability to significantly decrease the filter strength. default is an iir (i nfinite impulse response) filter of 2 (2 3 ). th is increased option enables an iir filter of 8 (2 3 ). the filter can be changed to 2 1 by setting this bit. hand - held power on detection (bit 2) standalone operation involves the detection of user interaction (movement) during power - on. when enabled, the slightest interaction detected during t pwr check will result in a safe output along with resetting the timer that times out at t pwr check . this allows for a safe period during power - up before starting with normal threshold based sensing. the movement parameters used for this feature will be as follows: ? t pwr check = movement time - out when ui is set to any proximity with movement selection ? t pwrcheck = 5 seconds when ui is set to proximity with no move me nt e nabled ? movement trigger threshold = movement thre shold register ? filtering = ac filter bit touch threshold (bit 1:0) threshold in counts that defines the level below the proximity threshold that cancels a quick release event and disables any active movement detection. 8.3 otp details : bank 2
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 20 of 37 all rights reserved check for latest datasheet march 2016 target (bit 6) the target count is an offset value of the actual system capacitance. the actual signal (expressed in counts) will be calibrated as close as possible to this val ue. a larger target optimizes sensitivity at the cost of charge transfer time. a lower target offers more stability, but less sensitivity. base value (bit 5:4) the base value is a lower target value for the actual signal and implies the system gain. a bas e value of 100 and target of 1000 implies a x10 gain, while base value of 200 and target of 1000 implies a x5 gain. failsafe (bit 3) this bit is only has an effect when user interface is set to standalone. default is to always ha ve 500us pulses on output, separated by the sampling period. a pulse will be on output every time a capacitive conversion is done. conversion rate and debounce events may be debugged through this output. figure 8 . 1 conversion signal on cx timing description figure 8 . 2 conversion diagram with failsafe output signal scan time sample time response (standalone) sleep time crx1 (touch & prox) crx1 (movement) stabilize time normal conversion rate burst mode to debounce proximity event no prox prox detected io1 cx
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 21 of 37 all rights reserved check for latest datasheet march 2016 otp details: bank 2 (...continued) quick release (bit 2) the quick release feature can be dis abled here. it is enabled by default. the quick release feature offers improved user experience and does not influence trigger testing. the feature is mainly directed at sar applications, but also has significant benefits for on - ear detection applications . the touch depth and speed of release is used to detect the instance where the user interaction implies a release condition. this is required for cases where the normal threshold release is not triggered for any of the following reasons: ? device placed on table while releasing the hand (the capacitive influence of the table remains) ? place device inside a bag while releasing the hand (the capacitive influence of the bag remains) ? fit a protective cover during use (the capacitive influence of the cover remains ) ? extreme temperature (cool down) shift causes a shift in capacitive environment ? capacitance impulse recovery (drop test, transient bursts etc) user interface (bit 1:0) when movement u i s are enabled, the timeout is only active in the proximity region. whe n in touch, only quick release can get the ic out of a stuck condition. in such case no movement time - out for quick release is fixed at 2sec and no - movement time - out for proximity is as defined in otps figure 8 . 3 proximity ui no movement por hand held detect proximity active quick release active & proximity active filter halt idle prox clear redo ati prox active ati error prox active hh proximity active qr detect prox detect 5sec !mov 2sec !mov normal prox release 5sec no prox hh detect enabled reference (lta) out-of-bounds por auto-ati calibration complete no calibration convergence 10 sec time-out mov detect 5sec !mov disable hh detect
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 22 of 37 all rights reserved check for latest datasheet march 2016 otp d etails : bank 2 (...continued) user interface (bit 1:0) (continued..) figure 8 . 4 proximity ui with movement user interface (bit 1:0) (continued..) figure 8 . 5 proximity & touch ui ( with movement enabled in proximity & movement disabled in touch ) por hand held detect proximity active quick release active & proximity active filter halt idle prox clear redo ati prox active ati error prox active hh proximity active qr detect prox detect 5sec !mov 2sec !mov normal prox release 5sec no prox x sec !mov hh detect enabled reference (lta) out-of-bounds por auto-ati calibration complete no calibration convergence 10 sec time-out mov detect 5sec !mov disable hh detect por hand held detect proximity active touch active quick release active & proximity active filter halt idle prox clear redo ati prox active ati error prox active hh proximity active touch detect normal touch release qr detect touch detect qr cancelled prox detect 5sec !mov 2sec !mov normal prox release 5sec no prox x sec !mov hh detect enabled reference (lta) out-of-bounds por auto-ati calibration complete no calibration convergence 10 sec time-out mov detect 5sec !mov disable hh detect touch detect disable hh detect
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 23 of 37 all rights reserved check for latest datasheet march 2016 8.4 otp details : bank 3 p rojected sensing ( bit 5) when disabled (default) self - capacitance technology is used. when enabled, proje cted capacitance technology is used. in this case input (io2) becomes a transmit signal and the cx pin (pin 6) becomes the receive pin. in this mode any other i/o function defined on io2 will be cancelled automatically. io2 function ( bit 4:3) by default io2 will be a sensitivity adjustment input. an internal pull - up (r internal ) will by default select a less sensitive option ( io2 = vddhi ). by strapping then pin directly to vss, a more sensitive option is selected ( io2 = vs s ). when the movement output is enabled, the input defaults to the more sensitive option as shown with io2 = vss with the output enabled the movement events are shown on io2. the output is in an active low, open drain configuration. the output will remai n low for t awake when movement is detected and this will occur during the sample time after the movement trigger occurs (the movement trigger is delayed with the sample rate ) sync input: the input (pin io2) may be used to detect when to sense and when to h alt the sensing. figure 8 . 6 sync input of the iqs231 ic mode ( bit 2) standalone (default), or i2c the advantage of this option is explained in the switch i 2 c to standalone section of the features summary. sample rate ( bit 1:0) the various sample rates offered are mainly given for the user to determine an ideal balance between power consumption and response time. overall response times of the iqs231 are improved with sar trigger te sting in mind. iqs 231 io1 vss io2 cx vddhi vreg 1 2 3 6 5 4 vddhi 0v sync pulse sync pulse mcu gpio sync pulse sync pulse startup time
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 24 of 37 all rights reserved check for latest datasheet march 2016 9 full programming reference a detailed list of the i 2 c registers follows and follows the structure of the memory map summary on page 6 . addr register name bit description xxh main_events 7 n/a 6 debug C debug events are disabled by default. in order to report debug events, enable debug events in register 0x03 and read debug event in register 0x02 when this bit is set. 5 sensing disabled C an indication o f forced or implied times when no sensing signals are applied to the sense pin. when this bit is set and bit 2 is cleared, sensing is disabled. when this bit and bit 2 is set, sensing is enabled again. 4 warm boot C a software reset command in register 0x04 will lead to a warm boot. this will imply a reset for the user interface, re - calibration, and hand - held power on detection will be forced if enabled. 3 cold boot C a hard reset (power supply cycle) will cause all registers to return to a default va lue. this indicator will imply the need to re - initialize the device. 2 release C a touch, prox or sensing event may be paired with a release indication to show an exit of the flagged event. 1 touch C disabled by default, this bit will be active when a touch and prox user interface is chosen. 0 prox - the main feedback bit to indicate an activation 00h product_ number n/a the product number is fixed at 0x40 01h software_ version n/a the only software version released is 0x04 02h debug_ events 7 n /a 6 ati_error C when a recalibration cannot converge, due to external tampering or instability, this bit will indicate the error and implies that the calibration does not offer optimal sensitivity. the prox event in the main events register will be set along with this bit in such case. 5 ch0_ati C an indication that a recalibration of the proximity sensing channel has occurred. with calibration, the prox output in main events will be set and after calibration, the prox output will release. 4 n/a 3 quick release C the quick release feature is a single event that is indicated here. this event will always imply an enter mov detect, but is not the only event that causes movement detection to be activated. 2 exit mov detect C the user interface dictates when the movement channel is deactivated. the deactivation of movement sensing will be reported in this bit. 1 enter mov detect C movement detection is user interface dependant and not continually active. movement detection implies that a sepa rate movement channel is activated. this activation will be reported in this bit.
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 25 of 37 all rights reserved check for latest datasheet march 2016 addr register name bit description 0 movement C C C C sensing disabled and release bit being set C C
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 26 of 37 all rights reserved check for latest datasheet march 2016 addr register name bit description 6 reserved 5 p rojected sensing (see otp bank definition) 4 io2 function (see ot p bank definition) 3 2 ic mode C 2 c or standalone. this powerful feature enables the designer to configure the device in i 2 c mode and thereafter reduce the i 2 c overhead and related emi by switching to stand alone for runtime. the actual mode switch occurs as soon as the communications window is closed with a stop command. it is recommended to enable the failsafe heartbeat when going from i 2 c mode to standalone. the absence of the heartbeat should be used to i ndicate an unexpected reset event, implying the need for i 2 c reconfiguration. 1 sample rate (see otp bank definition) 0 08h quick release 7 the otp options for quick release (see quick release threshold in otp bank 0) is extended in i 2 c mode to enable a very specific release characteristic. quick release threshold l ook - up table: 0x0 = 1 5 0 counts 0x1 = 1 0 0 0x2 = 50 0x3 = 250 0x4 = 10 0x5 = 20 0x6 = 25 0x7 = 30 0 x8 = 75 0x9 = 200 0xa = 300 0xb = 400 0xc = 245 0xd = 230 0xe = 335 0xf = 5 00 6 5 4 3 quick release beta C C
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 27 of 37 all rights reserved check for latest datasheet march 2016 addr register name bit description no movement time - out value: 0x0 = 0s 0x1 = 0.5s 0x2 = 1s 0x3 = 2 s 0x4 = 4s 0x5 = 5s 0x6 = 10s 0x7 = 20s 0x8 = 30s 0x9 = 1min 0xa = 2min 0xb = 5min 0xc = 10min 0xd = 30min 0xe = 60min 0xf = 90min 3 movement threshold. movement threshold = (value 2) + 4 available range: 4 C C C C C C
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 28 of 37 all rights reserved check for latest datasheet march 2016 addr register name bit description 2 1 0 0eh ch0 compensation n/a 0 C C C C C C C filter_halt 1 ati mode C C (proximity & touch threshold), a signal debounce is done C C C C C redoati . the count - down time until next attempt can be read in register 0x25 and 0x26. 6 reserved 5
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 29 of 37 all rights reserved check for latest datasheet march 2016 addr register name bit description 4 ch1 movement 3 ch0_ati error C C redoati . the count - down time until next attempt can be read in register 0x23 and 0x24. 2 ch0 undebounced C C C C C C C C C C C C C C C
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 30 of 37 all rights reserved check for latest datasheet march 2016 10 specifications 10.1 absolute m aximu m ratings the following absolute maximum parameters are specified for the device: exceeding these maximum specifications may cause dam age to the device . ? operating temperature - 40c to 85c ? supply voltage (vddhi C vss) 3.6 v ? maximum pin voltage vddhi + 0.5v (may not exceed vddhi max) ? maximum continuous current (for specific pins) 10ma ? minimum pin voltage vss C 0.5v ? minimum power - on slope 100v/s ? esd protection 8 kv ( human body model ) ? package moisture sensitivity level (msl) 1
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 31 of 37 all rights reserved check for latest datasheet march 2016 table 10 . 1 iqs2 3 1 general operating conditions description conditions par ame ter min typ max unit supply v oltage v ddhi 1. 75 n/a 3.6 v internal regulator o utput 1.75 v ddhi 3.6 v reg 1.62 1.65 1.72 v default o perating c urr ent 3.3v, scan time = 30ms i iqs2 31lp30 33 a full power setting 3.3v , scan time =9 ms i iqs2 3 1 fp 80 a halt charge 1 ua table 10 . 2 start - up and shut - down slope characteristics description conditions parameter min max unit power on reset v ddhi slope 100v/s @25 c por 1.2 1.6 v brown out detect v ddhi slope 100v/s @25 c bod 1.15 1.6 v table 10 . 3 various iqs231 characteristics description min typ max unit t comms_timeout - 20 - ms t clk_stretch 5 ms t filter_halt 5 s t pwr check 5 s t redoati 10 s t awake 9 ms r internal 20 k? f sampling 500 khz
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 32 of 37 all rights reserved check for latest datasheet march 2016 table 10 . 4 digital input trigger levels description conditions parameter min typical max unit all digital inputs vddhi = 3.3v input low level voltage 1.19 1.3 1.3 v all digital inputs vddhi = 1.8v input low level voltage 0.54 0.6 0.76 v all digital inputs vddhi = 1.8v input high level voltage 0.9 1.0 1.2 v all digital inputs vddhi = 3.3v input high level voltage 1.90 2.1 2.20 v table 10 . 5 digital output levels description conditions param eter @1ma* @10ma* unit output voltage low vddhi = 3.3v v ol 0.01 0.1 v output voltage high vddhi = 3.3v v oh n/a** n/a** v * current sinked into output pin ** only open drain output offered. pull - up resistor to vddhi recommended
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 33 of 37 all rights reserved check for latest datasheet march 2016 11 package information 11.1 ts ot23 - 6 figure 11 . 1 tsot23 - 6 packaging i table 11 . 1 tsot23 - 6 dimensions dimension min (mm) max (mm) a 2.60 3.00 b 1.50 1.70 c 2.8 0 3.00 d 0.30 0.50 e 0.95 basic f 0.84 1.00 g 0.00 0.10 h 0.30 0.50 i 0 8 j 0.03 0.20 i drawing not on scal e d a c e f g h i b j
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 34 of 37 all rights reserved check for latest datasheet march 2016 11.2 device packaging convention 11.2.1 top 23 1 xx ic name batch code ic name 231 batch xx 11.2.2 bottom no bottom marking present 11.3 msl level moisture sensitivity level (msl) relates to the packaging and handling precautions for some semiconductors. the msl is an electronic standard for the time period in which a moisture sensitive device can be exposed to ambient room conditions (approximately 30c/ 85 %rh see j - std0 33c for more info ) before reflow occur. package level (duration) tsot23 - 6 msl 1 (unlimited at 30 c/85% rh ) reflow profile peak temperature < 260 c for < 30 seconds
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 35 of 37 all rights reserved check for latest datasheet march 2016 12 ordering and part - number information 12.1 ordering information please check stock availa bility with your local distributor. configuration zzzzzzzz = ic configuration (hexadecimal) default 00000000 (o ther configurations available on request ) package type ts = tsot23 - 6 package bulk packaging r = reel (3000pcs/reel) C moq = 3000pcs moq = 1 reel (orders shipped as full reels) example ordering code for default device: iqs231 00000000 ts r 12.2 device numbering convention revision x = ic revision number tem perature range t = - 40 c to 85 c ( industrial ) date code p = internal use ww yy = batch number figure 12 . 1 tsot23 - 6 tape specification
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 36 of 37 all rights reserved check for latest datasheet march 2016 13 revision history revision number description date of issue v 1.0 ic release version 12 august 2015 v1.1 figure 1 . 2 updated C load capacitor moved ac filter is increased by default large quick release thresholds adapted known issues and workarounds: proximity threshold low frequency sensin g mode omission 9 october 2015 v1.2 typing error on proximity threshold otp in bank1 should be 110 C 195 not 136 v1.3 device package marking detail added 13 november 2015 v1.4 output voltage levels added 8 march 2016 v1.5 example schematic updated wit h c1 capacitor guide added low power references removed 4 may 2016
proxsense ? series copyright ? azoteq 2016 iqs231 datasheet v1.5 page 37 of 37 all rights reserved check for latest datasheet march 2016 appendix a contact information usa asia south africa physical address 6507 jester blvd bldg 5, suite 510g austin tx 78750 usa rm 2125 , glittery city shennan rd futian dis trict shenzhen, 518033 china 109 main street paarl 7646 south africa postal address 6507 jester blvd bldg 5, suite 510g austin tx 78750 usa rm 2125 , glittery city shennan rd futian district shenzhen, 518033 china po box 3534 paarl 7620 south africa tel +1 512 538 1995 +86 755 8303 5294 ext 808 +27 21 863 0033 fax +1 512 672 8442 +27 21 863 1512 email info@azoteq.com linayu@azoteq.com.cn info@azoteq.com please visit www.azoteq.com for a list of distributors and worldwide representation . the following patents relate to the device or usage of the device: us 6,249,089 b1; us 6,621,225 b2; us 6,650,0 66 b2; us 6,952,084 b2; us 6,984,900 b1; us 7,084,526 b2; us 7,084,531 b2; us 7,265,494 b2; us 7,291,940 b2; us 7,329,970 b2; us 7,336,037 b2; us 7,443,101 b2; us 7,466,040 b2 ; us 7,498,749 b2; us 7,528,508 b2; us 7,755,219 b2; us 7,772,781 b2; us 7,781,9 80 b2; us 7,915,765 b2; us 7,994,726 b2; us 8,035,623 b2; us re43,606 e; us 8,288,952 b2; us 8,395,395 b2; us 8,531,120 b2; us 8,659,306 b2; us 8,823,273 b2; ep 1 120 018 b2; ep 1 206 168 b1; ep 1 308 913 b1; ep 1 530 178 a1; ep 2 351 220 b1; ep 2 559 164 b1; cn 1330853; cn 1783573; aus 761094; hk 104 1401 iq switch ? , swipeswitch?, proxsense ? , lightsense?, airbutton tm , proxfusion?, crystal driver? and the logo are trademarks of azoteq. the information in this datasheet is believed to be accurate at the time of publication. azoteq uses reasonable effort to maintain the information up - to - date and accurate, but does not warrant the accuracy, completeness or reliability of the information contained herein. all content and information are provided on a n as is basis only, without any representations or warranties, express or implied, of any kind, including representations about the suitability of these products or information for any purpos e. azoteq disclaims all warranties and conditions with regard to these products and information, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non - infringement of any thi rd party intellectual property rights. azoteq assumes no liability for any damages or injury arising from any use of the information o r the product or caused by, without limitation, failure of performance, error, omission, interruption, defect, delay in op eration or transmission, even if azoteq has been advised of the possibility of such damages. the applications mentioned herei n are used solely for the purpose of illustration and azoteq makes no warranty or representation that such applications will be sui table without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. azoteq products are not authorized for use as critical components in life support devices or s ystems. no licenses to patents are granted, implicitly, express or implied, by estoppel or otherwise, under any intellectual property ri ghts. in the event that any of the abovementioned limitations or exclusions does not apply, it is agreed that azoteqs total liability for all losses, damages and causes of action (in contract, tort (including without limitation, negligence) or otherwise) will not exceed the amount already paid by the customer for the products. azoteq reserves the right to alter its produ cts, to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and information, its products, programs and services at any time or to move or discontinue a ny contents, products, programs or services without prior notification. for the most up - to - date information and binding terms and conditions please refer to www.azoteq.com . www.azoteq.com/ip info@azoteq.com

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