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wide dynamic range microphone with pdm digita l output data sheet admp621 features 1 3 3 db spl acoustic overload point small and thin 4 mm 3 mm 1 mm surface - mount package omnidirectional response very h igh signal - to - noise ratio ( snr ) : 6 5 dba s ensitivity of ? 4 6 dbfs extended frequency response from 45 hz to >20 khz low current consumption : 1.2 m a sleep mode for extended battery life : 5.5 a consumption high power supply r ejection ( ps r ): ? 10 0 dbfs fourth - order - modulator digital pulse density modulation ( pdm ) output compatible with sn/pb and pb - free solder processes rohs/wee e compliant applications smartphones and feature phones tablet computers teleconferencing systems digital still and video cameras bluetooth h eadsets notebook pcs security and surveillance functional block dia gram admp621 ad c power management clk data v dd gnd pdm modulator channel select l/r select 1 1609-001 figure 1. bottom top 1 1609-0 1 1 figure 2 . isometric views of admp621 microphone package general description the admp621 1 is a high sound pressure level ( spl ) , ultra low noise , low power , digital output , bottom ported omnidirectional mems microphone. this microphone clips at 13 3 db spl , which is useful for c learly capturing audio in loud environments . the admp621 consists of a mems microphone element a n d an impedance converter amplifier followed by a fourth - order - modulator. the digital interface allows the pulse density modulated ( pdm ) output of two microphones to be time multiplexed on a single data line using a single clock. the admp621 is pin compa tible with the admp421 and admp521 microp hone s, providing an easy upgrade path. the admp621 has a high snr of 6 5 db a and sensitivity of ? 4 6 dbfs . the admp621 has a n extended wideband frequency response , resulting in natural sound with high intelligibility. low current consumption and a sleep mode with less than 5.5 a of current consumption enable s long battery life for portable applications. the admp621 is available in a thin 4 mm 3 mm 1 mm surface - mount package. it is reflow solder compatible with no sensitivity d egradation. 1 protected by u.s. patents 7,449,356; 7,825,484; 7,885,423; and 7,961,897. other patents are pending. rev. 0 document feedbac k information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. spe cifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p. o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 ? 2013 analog devices, inc. all rights reserved. technical support www.analog.com
admp621 data sheet table of contents features .............................................................................................. 1 applications ....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 timing characteristics ................................................................ 4 absolute maximum ratings ............................................................ 5 esd caution .................................................................................. 5 pin configuration and function descriptions ............................. 6 typical performance characteristics ............................................. 7 theory of operati on ........................................................................ 8 pdm data format ........................................................................ 8 pdm microphone sensitivity ..................................................... 8 dynamic range considerations ................................................. 9 connecting pdm microphones ..................................................9 sleep mode .................................................................................. 10 start - up time ............................................................................. 10 applications information .............................................................. 11 interfacing with analog devices codecs ................................ 11 supporting docu ments ............................................................. 11 pcb design and layout ................................................................. 12 alternative pcb land patterns ................................................. 13 pcb material and thickness .................................................... 13 handling instructions .................................................................... 14 pick - and - place equipment ....................................................... 14 reflow solder .............................................................................. 14 board wash ................................................................................. 14 outline dimensions ....................................................................... 15 ordering guide .......................................................................... 15 revision hi story 7 /13 revision 0: initial revision rev. 0 | page 2 of 16
data sheet admp621 specifications t a = 25 c, v dd = 1.8 v , clk = 3.072 mhz, c load = 30 pf , unless otherwise noted. all minimum a nd maximum specifications are guaranteed. typical specifications are not guaranteed. table 1 . parameter test conditions/comments min typ max unit performance directionality omni output polarity input acoustic pressure v s. output data inverted sensitivity 1 , 2 1 khz, 94 db spl ? 4 8 ? 4 6 ? 4 4 dbfs signal -to - noise ratio (snr) 20 hz to 20 khz , a - weighted 6 5 dba equivalent input noise (ein) 20 hz to 20 khz , a - weighted 29 dba spl acoustic dynamic range derived from ein and acoustic overload point 104 db digital dynamic range derived from ein and full - scale acoustic level 111 db frequency response 3 low frequency ?3 db point 45 hz high frequency ?3 db point >20 khz total harmonic distortion (thd) 105 db spl 0.35 1 % power supply rejection (psr) 217 hz, 100 mv p - p square wave superimposed on v dd = 1.8 v , a - weighted ? 1 0 0 dbfs power supply rejection swept sine 1 khz sine wave ?113 db acoustic overload point 10% thd 1 3 3 db spl full - scale acoustic le vel 0 dbfs output 140 db spl power supply supply voltage (v dd ) 1. 62 3. 63 v supply current (i s ) normal mode v dd = 1.8 v 1.2 1. 5 ma v dd = 3.3 v 1.3 1.6 ma sleep mode 4 v dd = 1.8 v 5.5 a v dd = 3.3 v 8 a digital input/output cha racteristics input voltage high (v ih ) 0.65 v dd v input voltage low (v il ) 0.35 v dd v output voltage high (v oh ) i load = 0.5 ma 0.7 v dd v dd v output voltage low (v ol ) i load = 0.5 ma 0 0.3 v dd v output dc offset percent of full scale 3 % latency <30 s noise floor 20 hz to 20 khz, a - weighted ? 111 dbfs 1 sensitivity is r elative to the rms level of a sine wave with positive amplitude equal to 100% 1s density and negative amplitude equal to 0% 1s density. 2 the 2 db sensitivity specification is valid for clk = 3.072 mhz. at lower clock frequencies, the min imum and max imum specification s are ?49 dbfs and ? 43 dbfs , respectively . 3 see figure 6 and figure 7 . 4 the microphone enters sleep mode when the clock frequency is less than 1 khz. rev. 0 | page 3 of 16
admp621 data sheet timing characteristi cs table 2 . parameter description min typ max unit sleep mode sleep time time from clk falling < 1 khz 1 ms wake - up time time from clk rising > 1 khz to output within 3 db of final sensitivity, power on 25 ms input t clkin input clock period 270 1 000 n s clock frequency (clk) 1.0 3.072 1 3.6 mhz clock duty ratio 40 60 % output t 1outen data1 (right) driven after falling clock edge 31 ns t 1outdis data1 (right) disabled after rising clock edge 5 23 ns t 2outen data2 (left) driven after rising clock edge 31 ns t 2outdis data2 (left) disabled after falling clock edge 5 26 ns 1 the microphone operate s at any clock frequency between 1.0 mhz and 3. 6 mhz. some specifications may not be guarante ed at frequencies other than 3.072 mhz. timing diagram t clkin clk data2 data1 t 2outdis t 1outdis t 2outen t 1outen 1 1609-002 figure 3 . pulse density modulated output timing rev. 0 | page 4 of 16
data sheet admp621 a bsolute m aximum r atings table 3 . parameter rating supply voltage ?0.3 v to + 3.6 3 v digital pin input voltage ?0.3 v to v dd + 0.3 v or + 3.6 3 v, whichever is less sound pressure level 160 db mechanical shock 1 0,000 g vibration per mil - std -883 m ethod 2007, test condition b operating temperature range ? 40c to + 85c storage temperature range ?55c to +150c stresses above those listed under absolute maximum ra tings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute ma ximum rating conditions for extended periods may affect device reliability. esd caution t p t l t s prehe a t critica l zone t l t o t p temper a ture time ramp-down ramp-u p t smin t smax t p t l t 25c to peak temperature 1 1609-003 figure 4. recommended soldering profile limits table 4 . recommended soldering profile limits profile feature sn63/pb37 pb - free average ramp rate (t l to t p ) 1.25c/sec max imum 1.25c/sec maximum preheat minimum temperature (t smin ) 100c 100c maximum temperature (t smax ) 150c 200c time (t smin to t smax ), t s 60 sec to 75 sec 60 sec to 75 sec ramp - up rate (t smax to t l ) 1.25c/sec 1.25c/sec time maintained above liquidous (t l ) 45 sec to 75 sec ~50 sec liquidous temperature (t l ) 183c 217c peak temperature (t p ) 215c +3 c/?3c 260c + 0c/?5c time within 5c of actual peak temperature (t p ) 20 sec to 30 sec 20 sec to 30 sec ramp - down rate 3c/sec maximum 3c/sec maximum time 25c (t 25c ) to peak temperature 5 minute maximum 5 minute maximum rev. 0 | page 5 of 16
admp621 data sheet pin configuration an d func tion descriptions 3 clk l/r select gnd data v dd 4 5 2 1 1 1609-004 figure 5. pin configuration (bottom view) table 5 . pin function descriptions pin no. mnemonic description 1 clk clock input to microphone . 2 l/r select left channel or right channel s elect . data1 ( r ight ) : l/r select tied to gnd. data2 ( l eft ) : l/r select t ied to v dd . 3 gnd ground . 4 v dd power supply . to avoid potential parasitic artifacts and for best performance, p lac ing a 0.1 f (100 nf) ceramic type , x7r capacitor betwee n pin 4 (v dd ) and ground is strongly recommended . place t he capacitor as close to pin 4 as possible. 5 data digital output signal (data1, data2) . rev. 0 | page 6 of 16
data sheet admp621 typical performance characteristics 20 ?20 ?15 ?10 ?5 0 5 10 15 10 100 1k 10k normalized amplitude (db) frequency (hz) 11609-106 figure 6 . frequency response mask 20 ?20 ?15 ?10 ?5 0 5 10 15 10 100 1k 10k normalized amplitude (db) frequency (hz) 1 1609-107 figu re 7 . typical frequency response (measured) 0 ?140 ?120 ?100 ?80 ?60 ?40 ?20 100 1k 10k psr (dbfs) frequency (hz) 1 1609-108 figure 8. ps r vs. frequency , 100 mv p - p swept sine wave 0.1 1 10 90 95 100 105 110 115 120 125 130 135 140 thd + n (%) input level (db spl) 1 1609-109 figure 9. total harmonic distortion + noise (thd + n) vs. input spl ?50 ?45 ?40 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 90 100 110 130 120 140 output level (dbfs) input level (db spl) 1 1609- 1 10 figure 10 . linearity ?0.8 ?0.6 ?0.4 ?0.2 0 0.2 0.6 0.8 0.4 1.0 0 0.0002 0.0004 0.0008 0.0006 0.0010 output level (d) time (seconds) 1 1609- 11 1 130db spl 132db spl 134db spl 136db spl 138db spl figure 11 . clipping characteristics rev. 0 | page 7 of 16
admp621 data sheet theory o f operation pdm data format the output from the data pin of the admp6 21 is in pulse density modulated (pdm) format. this data is the 1 - bit output of a fourth - order - modulator. the data is encoded so that the left channel is clocked on the falling edge of clk , and the right channel is clocked on the rising edge of clk. after driving the data signal high or low in the appropriate half frame of the clk signal, the da ta driver of the microphone tristate s . in this way, two microphones, one set to the left channel and the other to the right, can drive a single data line. see figure 3 for a timing diagram of the pdm data format; the data1 and dat a2 lines shown in this figure are two halves of the single physical data signal. figure 12 shows a diagram of the two stereo channels sharing a common data line. data2 (l) data2 (l) data1 (r) data1 (r) clk data 1 1609-013 figure 12 . stereo pdm format if only on e microphone is connected to the data signal, the output is only clocked on a single edge ( see figure 13) . for example, a left channel microphone is never clocked on the rising edge of clk . in a single microphone application, eac h bit of the data signal is typically held for the full clk period until the next transition because the leakage of the data line is not enough to discharge the line while the driver is tristated. d a t a 1 ( r ) d a t a 1 ( r ) d a t a 1 ( r ) c l k d a ta 1 1609-012 figure 13 . mono pdm format see table 6 for the channel assignments according to the logic level on the l/r select pin . table 6 . channel setting l/r select s etting channel low ( t ie to g round) data1 (right) high ( tie to v dd ) data2 (left) for pdm data, the density of the pulses indicates the signal amplitude. a high density of high pulses indica tes a signal near positive full scale , and a high density of low pulses indicates a signal near negative full scale. a perfect zero (dc) audio signal show s an alternating pattern of high and low pulses. the output pdm data signal has a small dc offset of about 3 % of full scale. a high - pass filter in the codec that is connected to the digital microphone and does not affect the performance of the microphone typically remove s this dc signal . pdm microphone sensi tivity the sensitivity of a pdm output microphone is specified with the unit db fs (decibels re lative to digital full scale). a 0 db fs sine wave is defined as a signal whose peak just touches the full - scale code of the digital word ( see figure 14 ) . this measurement convention also means that signals with a different crest factor may have an rms level higher than 0 dbf s. for example, a full - scale squar e wave has an rms level of 3 db fs. this definition of a 0 dbfs signal must be understood when measuring the sensitivity of the admp621 . a 1 khz sine wave at a 9 4 db spl acoustic input to the admp621 result s in an output signal with a ? 46 db fs level . t h e output digital word peaks at ?46 db below the digital full - scale level. a common misunderstanding is that the output has an rms level of ?49 dbfs; however, this is not true because of the definition of the 0 dbfs sine wave. 1.0 ?1.0 ?0.8 ?0.6 ?0.4 ?0.2 0 0.2 0.4 0.6 0.8 0 0.9 1.0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 digital amplitude (d) time (ms) 1 1609- 1 14 figure 14 . 1 khz, 0 dbfs sine wave there is not a commonly accepted unit of measurement to express the in stantaneous level, as opposed to the rms level of the signal, of a digital signal output from the microphone. some measurement systems express the instantaneous level of an individual sample in units of d, where 1.0 d is d igital full scale. in this case, a ? 46 db fs sine wave has peaks at 0.005 d. rev. 0 | page 8 of 16
data sheet admp621 dynamic range consid erations the full - scale digital output (0 dbfs) of the admp621 is mapped to an acoustic input of 140 db spl. the micropho ne clip s (thd = 10%) at 13 3 db spl ( see figure 9 ) ; however, it continue s to output an increasingly distorted signal above that point. the peak output level, which is controlled by the modulator , limit s at about ?3 dbfs (see figure 10). to f ul ly u s e the 111 db digital dynamic range of the output data of the admp621 in a design, the digital signal processor ( dsp ) , analog - to - digital converter ( adc ), or codec circuit following it must be chosen carefu lly. the decimation filter that inputs the pdm signal from the admp621 must have a dynamic range sufficiently better than the dynamic range of the microphone so that the overall noise performance of the system is not degrade d . if the decimation filter has a dynamic range of 10 db better than the microphone (12 1 db), the overall system noise only degrades by 0.4 db. connecting pdm micro phones a p dm output microphone is typically connected to a codec with a dedicated pdm input. this codec separately decode s the left and right channels and filter s the high sample rate modulated data back to the audio frequency band. this codec also generate s the clo ck for the pdm microphones or is synchronous with the source that is generating the clock. see the applications information section for additional details on connecting the admp621 to analog devices , inc., audio codecs with a pdm input. figure 15 and figure 16 show mono and stereo connections of the admp621 to a codec. t he mono connection shows an admp621 set to output data on the right channel. to output on the left channel, tie the l/r select pin to v dd instead of tying i t to gnd. clock output codec 0.1f 1.8v to 3.3v gnd l/r select data admp621 clk v dd data input 1 1609-014 figure 15 . mono pdm microphone (right channel) connection to codec clock output codec 0.1f 1.8v to 3.3v gnd l/r select data admp621 clk v dd data input 0.1f 1.8v to 3.3v gnd l/r select data admp621 clk v dd 1 1609-015 figure 16 . stereo pdm microphone connection to codec decouple t he v dd pin of the admp621 to gnd with a 0.1 f capacitor. place t his capacitor as close to v dd as the printed circuit board (pcb) layout allows. do not u se a pull - up or pull - down resistor on the pdm data signal line because it c an pull the signal to an inc orrect state during the period that the signal line is tristated. the data signal does not need to be buffered in normal use when t he admp621 microphone(s) is placed close to the codec on the pc b . if the data signal must be driven over a long cable (>15 cm) or other large capacitive load, a digital buffer may be require d. only use a signal buffer on the data line when one microphone is in use or after the point where two microphones are connected ( see figure 17) . the data output of each microphone in a stereo configuration cannot be individually buffered because the two buffer outputs cannot drive a single signal line. if a buffer is used, take care to select one with low propagation delay so that the timing of the data connected to the codec is not corrupted. clock output codec data admp621 admp621 clk data input data clk 1 1609-016 figure 17 . buffered connection between stereo admp621 s and a codec rev. 0 | page 9 of 16
admp621 data sheet when long wires are used to connect the codec to the admp621 , a source termination resistor can be used on the clock output of the codec instead of a buffer to mini mize signal overshoot or ringing . match t he value of this resistor to the characteristic impedance of the clk trace on the pcb. depending on the drive capability of the codec clock output, a buffer may still be needed, as shown in figure 17. sleep mode the microphone e nters sleep mode when the clock frequency falls below 1 khz. in this mode , the microphone data output is in a high impedance state. the current consumpt ion in sleep mode is less than 5.5 a. the admp621 enters sleep mode within 1 ms of the clock frequency falling below 1 khz. the microphone wakes up from sleep mode and begin s to output data 32,768 cycles after the clock becomes active. for a 3.072 mhz clock, the microphone start s to output data i n 10.7 ms. for a 2.4 mhz clock, the microphone start s to output data in 13.7 ms. the wake - up time, as specified in table 2 , indicates the time from when the clock is enabled to when the admp621 outputs data within 3 db of its settled sensitivity. start - u p time the start - up time of the admp621 from when the clock is active is the same as the wak e - up time . the mic rophone starts up 32,768 cycles after the clock is active. rev. 0 | page 10 of 16
data sheet admp621 applications informa tion interfacing w ith analog devices c odecs the pdm output of the admp621 interfaces directly with the digital microphone inputs on the analog devices adau1361 , adau1761 , adau1781 , and adau1772 codecs. see the connection diagram shown in figure 18 , and refer to the an - 1003 application note and the respective data sheets of the codecs for more details on the digital microphone interface. the cn - 0078 circuit n ote describes the connection b etween these codecs and a digital microphone. all hardware configuration information is the same for the admp621 as it is for the admp4 21. supporting documents for additional information, see the following user guide, circuit note, and application notes . evaluation board user guides ug - 326 , pdm digital output mems microphone ev aluation board circuit note cn - 0078, high performance digital mems microphone simple interface to a sigmadsp audio codec application notes an - 1003, recommendations for mounting and connecting analog devices, inc., bottom - ported mems microphones an - 1068, reflow soldering of the mems microphone an - 1112, microphone specifications explained an - 1124, recommendations for sealing analog devices, inc., b ottom - port mems microphones from dust and liquid ingress an - 1140, microphone array beamforming avdd agnd dgnd micbias adau1361 or adau1761 0.1f 0 . 1 f 1.8v to 3.3v jackdet/micin gnd l/r select data v dd clk admp621 admp621 gnd l/r select data v dd clk bclk/gpio2 1 1609-008 figure 18 . adau1361 or adau1761 stereo interface block diagram rev. 0 | page 11 of 16
admp621 data sheet pcb design and layout the recommended pcb land pattern for the admp621 must be laid out to a 1:1 ratio to the solder pads on the micropho ne package, as shown in figure 19. a void applying solder paste to the sound hole in the pcb. a suggested solder paste stencil pattern layout is shown in figure 20. the response of the admp621 is not affected by the pcb hole size as long as the hole is not smaller than the sound port of the microphone (0.25 mm, or 0.010 inch , in diameter). a 0.5 mm to 1 mm (0.020 inch to 0.040 inch) diameter fo r the hole is recommended. take care to a lign the hole in the microphone package with the hole in the pcb. the exact degree of the alignment does not affect the microphone performance as long as the holes are not partially or completely blocked. 0.40 0.60 (4) (0.30) 0.90 (0.30) ?1.70 3.80 (0.30) 0.35 2.80 2 r0.10 (0.30) 0.35 2.05 0.70 ?1.10 (1.000) (0.550) center line 11609-009 figure 19 . recommend ed pcb land pattern layout 1.45 0.9 2.45 0.7 1.525 1.000 0.35 1.849 1.849 1.498 0.205 wide 0.248 0.498 (2) 0.248 1.148 (2) 0.248 0.948 (2) 1.498 0.248 0.398 0.298 (4) 0.362 cut (3) 1.17 24 24 0.375 center line 1 1609-010 figure 20 . suggested solder paste stencil pattern layout rev. 0 | page 12 of 16
data sheet admp621 alternat ive pcb lan d patterns the standard pcb land pattern of the admp621 has a solid ring around the edge of the footprint that can make routing the microphone signals more difficult in some board designs. this r ing is used to improve the radio frequency ( rf ) immunity performance of the admp621 ; however, it is not necessary to have this full ring connected for electrical functionality. if a design can to lerate reduced r f immunity , this ring can either be broken or removed c ompletely from the pcb footprint. figure 21 shows an example pcb land pattern with no enclosing ring around the edge of the part, and figure 22 shows an example pcb land pattern with the ring broken on two sides so that the inner pads can be more easily routed on the pcb . 1 1609-017 figure 21 . example pcb land pattern with no enclosing ring 1 1609-018 figure 22 . example pcb land pattern with broken enclosing ring note that in both of these patterns, the solid ring around the sound port is still present; this ring is needed to ground the microphone and for acoustic performance. the pad on t he package connected to this ring is ground and still needs a solid electrical connection to the pcb ground. if a pattern like one of these two examples is used on a pcb, take care that the unconnected ring on the bottom of the admp621 is not placed directly over any exposed copper. this ring on the microphone is still at ground , and any pcb traces routed underneath it must be properly masked to avoid short circuits. pcb material and thi ckness the performance of the admp621 is not affected by pcb thickness and can be mounted on either a rigid or flex ible pcb. a flexible pcb with the microphone can be attached directly to the device housing with an adhesive layer. this mounting method offers a reliable seal around the sound port, while providing the shortest acoustic path for good sound quality . rev. 0 | page 13 of 16
admp621 data sheet handling instruction s pick - and - place equipment the mems microphone can be handled using standard pick - and - place and chip shooting equipment. take c are to avoid damage to the mems microphone structure as follows: ? use a standard pickup tool to handle the microphone. because the microphone hole is on the bottom of the package, the pickup tool can make contact with any part of the lid surface. ? do not pick up the microphone with a vacuum tool that makes contact with the bottom side of the microp hone. do not pull air out of or blow air into the microphone port. ? do not use excessive force to place the microphone on the pcb . reflow solder for best results, the soldering profile must be in accordance with the recommendations of the manufacturer of the solder paste used to attach the mems microphone to the pcb . it is recommended that the solder reflow profile not exceed the limit conditions specified in figure 4 and table 4 . board wash when washin g the pcb, ensure that water does not make contact with the microphone port. do not use b low off procedures or ultrasonic cleaning. rev. 0 | page 14 of 16
data sheet admp621 outline dimensions 04-19-2012-g 1.50 2.80 bot t om view top view side view reference corner 4.10 4.00 3.90 3.10 3.00 2.90 1 2 3 4 5 0.90 2.48 ref 0.72 ref 3.54 ref 1.05 ref 2.05 3.80 0.70 0.30 ref 0.25 dia. (thru hole) 1.10 dia. r 0.10 (2 ) 1.70 dia. 0.95 ref 0.35 0.35 0.30 ref 0.30 ref 1.10 1.00 0.90 0.24 ref 0.40 0.60 (pins 1, 2, 4, 5) 0.30 ref pin 1 figure 23 . 5- terminal chip array small outline no lead cavity [lga_cav] 4 mm 3 mm body (ce - 5- 1) dimensions shown in millimeters ordering guide model 1 temperature range package description package option 2 ordering quantity admp621 acez - rl ?40c to + 85c 5 - terminal lga_cav , 13 tape and reel ce -5 -1 5 ,000 admp621 acez - rl7 ?40c to + 85c 5 - terminal lga_cav, 7 tape and reel ce -5 -1 1,000 eva l - admp621 z - fle x flex ible evaluation board 1 z = rohs complia nt part. 2 this package option is halide free . rev. 0 | page 15 of 16
admp621 data sheet notes ? 2013 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d11609 - 0 - 7/13(0) rev. 0 | page 16 of 16

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