 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ver 2.9 1 10/06/25 es51926 3000 counts smart dmm features z 3000 counts lcd display z 3v dc power supply z conversion rate: 4 times/s (voltage mode) z full automatic measurement: *voltage/current: ac/dc auto scanning & auto range: 3.000v~1000v *resistance/diode/capacitance(rdc scan) ( taiwan patent no.: 326361) auto scanning & auto range: resistance: 300.0 ~3.000m capacitance: 3.000nf~300.0uf ( taiwan patent no.: 323347,453443 ) z push functions function selection by single key range change function hold function max/min function vahz function back light function z support non-contact voltage detection z high voltage (> 30v) indication of lcd display for voltage measurement ( taiwan patent no.: 234661 ) z built-in hcf(high crest factor detection) function in ac mode z ol level selection (600v/1000v/1500v) z band-gap reference voltage output z auto power off (3min. or 10min.) & re-power on z sleep output indication z on-chip buzzer driver z low battery detection application z smart digital multi-meter z smart clamp meter general description es51926 is an integrated adc with 3000 counts lcd display driver. it could support fully automatic dmm functi on measurement. in voltage or current mode, the ac or dc signals auto scanning. in r/d/c (passive component) mode, resistance (including continuity), capacitance or diode measurements are allowed by fully automatic detection. a single key and simple switch could select all measurements. expensive and bulky mechanical range switches are not required. a non- contact electric field detector (ef mode) is built-in for ac voltage measurement also. other features including range control, data hold, max/min hold, vahz and back light function are available. for power saving, an auto power off & re-power on scheme are built-in. a sleep output is the indication of entering auto power off mode.
ver 2.9 2 10/06/25 es51926 3000 counts smart dmm pin assignment seg12 seg13 seg14 seg15 clamp von aon fa fua fc3 fc2 fc1 hold sel vahz range max/min bklit efen bp1 bp2 bp3 bp4 annunc bkout seg11 seg10 nc nc seg09 seg08 seg07 seg06 seg05 seg04 seg03 seg02 seg01 osc2 osc1 bksel cesel c+ c- v- v- v+ v+ dgnd agnd pin description pin no symbol type description 1 agnd p analog ground. 2 lbat i low battery configuration. if 3v battery is used, connect it to dgnd. the default low-battery threshold volta ge is ?2.3v. if 9v battery is used, the low battery enunciator is displayed when the voltage of this pin is less than vrh (-1.2v) 3 cref+ i/o positive connection fo r reference capacitor. 4 cref- i/o negative connection for reference capacitor. 5 cint o integrator output. connect to integral capacitor 6 caz i auto-zero capacitor connection. 7 buff o buffer output pin. connect to integral resistor 8 raz o buffer output pin in high-speed mode. connect to high-speed integral resistor. 9 ivsh i high curren t measurement input. 10 ivsl i low current measurement input agnd lbat cref+ cref- cint caz buff raz ivsh ivsl ovx ovh ovsg or1 vr5 vr4 vr3 vr2 test5 acvl acvh adi ado ohmc4 ohmc3 nc nc nc nc nc acen buzout aposel buzin sleep r1k r9k- ca+ ca- nc vr1 va - va + adp sgnd vr vrh nc ohmc1 ohmc2 5 10 15 20 50 45 40 35 30 75 70 65 60 55 80 85 90 95 cyrustek. com.tw es51926 100 25 ver 2.9 3 10/06/25 es51926 3000 counts smart dmm 11 ovx i input high voltage fo r resistance/capacitor measurement 12 ovh i output connection for resistance/capacitor measurement 13 ovsg i sense low voltage for resistance measurement 14 or1 o reference resistor connection for 300.0 ? range 15 vr5 o voltage measurement 10000 attenuated (1000v) 16 vr4 o voltage measurement 1000 attenuated (300.0v) 17 vr3 o voltage measurement 100 attenuated (30.00v) 18 vr2 o voltage measurement 10 attenuated (3.000v) 19 test5 i/o test pin 20 acvl i dc signal low input in acv/aca mode. connect to negative output of external ac to dc converter. 21 acvh i dc signal high input in acv/aca mode. connect to positive output of external ac to dc converter. 22 adi i negative input of internal ac to dc op amp. 23 ado o output of internal ac to dc op amp. 24 ohmc4 o filter capacitor connection for resistance mode 25 ohmc3 o filter capacitor connection for resistance mode 26 ohmc2 o filter capacitor connection for resistance mode 27 ohmc1 o filter capacitor connection for resistance mode 28 nc - 29 vrh o output of band-gap voltage reference. typically ?1.2v 30 vr i reference input voltage connection. typically ?400mv 31 sgnd i signal ground. 32 adp i measurement input in adp mode 33 va+ i for adp mode. de-integrating voltage positive input. the input should be higher than va-. 34 va- i for adp mode. de-integrating voltage negative input. the input should b e lower than va+. 35 vr1 i measurement input. 36 nc - 37 ca- i/o negative auto-zero capacitor connection for capacitor measurement 38 ca+ i/o positive auto-zero capacitor connection for capacitor measurement 39 r9k o connect to a precise 9k ? resister for capacitor measurement. 40 r1k o connect to a precise 1k ? resister for capacitor measurement. 41 sleep o sleep mode indicator, asserts low in sleep mode. normal v+ output. 42 buzin i pull to v- to enable the buzout. 43 aposel i auto power off idle time selection. 44 buzout o outputs a 2khz audio frequen cy signal for driving piezoelectric buzzer 45 acen o output to v- when ac mode inactive and output to v+ in ac mode. 46 ? 50 nc - 51 bkout o if bklit function is enabled, this pin will change from ?3v to +3v for 60 sec, once press bklit pin again within 60 sec, this pin will chang e back to ?3v. 52 annunc o square wave output at the backplane frequency, synchronized to bp1. annunc can be used to control display annunciator. connect a lcd segment to annunc to turn it on; connect an lcd segment to its back plane to turn it off. 53 bp4 o lcd backplane 4 54 bp3 o lcd backplane 3 55 bp2 o lcd backplane 2 56 bp1 o lcd backplane 1 57 efen i pull-low to enable non-contact ac voltage detection 58 bklit i back light function. pulse low to set bkout pin output. 59 max/min i pulse to v- to enable max/min function. 60 range i pulse to v- to enable manual mode and manual range selection. 61 vahz i pulse to v- to enable vahz mode. ver 2.9 4 10/06/25 es51926 3000 counts smart dmm 62 sel i pulse to v- to select target measurement 63 hold i pulse to v- to enable hold function. 64 fc1 i switch 1 for function selection. 65 fc2 i switch 2 for function selection. 66 fc3 i switch 3 for function selection. 67 fua i switch 1 for current measurement selection. 68 fa i switch 2 for current measurement selection. 69 aon i pull to high to sense current m easurement priority in auto scan mode 70 von i pull to high to sense voltage measurement priority in auto scan mode 71 clamp i switch for clamp meter application function 72 ? 77 seg15 ? 10 o lcd segment line 10 ? 15 78 ? 79 nc - 80 ? 88 seg09 - 01 o lcd segment line 01 ? 09 89 osc2 i crystal oscillator input connection 90 osc1 o crystal oscillator output connection 91 bksel i when pulled to v-, an auto back light configuration is allowed. configure a low level applied to bklit larger than 1 second, the bkout will be active. if bklit is back to high level, the bkout would be inactive. 92 cesel i ol selection feature control pin. 93 c+ o positive capacitor connec tion for on-chip dc-dc converter. 94 c- o negative capacitor connection for on-chip dc-dc converter. 95 v- p negative supply voltage. connecting to battery negative terminal. 96 v- p negative supply voltage. connecting to battery negative terminal. 97 v+ p/o output of on-chip dc-dc converter. 98 v+ p/o output of on-chip dc-dc converter. 99 dgnd g digital ground. 100 agnd g analog ground. absolute maximum ratings characteristic rating supply voltage ( v - to agnd) -4v a nalog input voltage v- -0.6 to v+ +0.6 v + v+ (agnd/dgnd+0.5v) a gnd/dgnd agnd/dgnd (v- -0.5v) d igital inpu t v- -0.6 to dgnd +0.6 p ower dissipation. flat package 500mw operating temperature 0 to 70 storage temperature -25 to 125 ver 2.9 5 10/06/25 es51926 3000 counts smart dmm electrical characteristics ta=25 , v- = -3v parameter symbol test condition min. typ. max units power supply v- -3.5 -3.0 -2.5 v i dd normal operation 2.5 ma operating supply current in scan ac/dc mode i ss in sleep mode 0.6 2.5 a voltage roll-over error rev 10m ? input resistor 0.1 %f.s 1 voltage nonlinearity nlv best case straight line 0.1 %f.s input leakage -10 1 10 pa low battery flag voltage v- to agnd -2.4 -2.3 -2.2 v zero input reading 10m ? input resistor -000 000 +000 counts peak to peak backplane drive voltage -3.5v v -2.2v 3.0 3.15 3.3 v counter time base period f osc = 4mhz 1 sec reference voltage and open circuit voltage for 300 ? measurement v ref 100k ? resistor between vrh and agnd -1.33 -1.23 -1.13 v open circuit voltage for measurement (except 300 ) and continuity mode -0.86 -0.78 -0.70 v internal pull-high to 0v current between v- pin and hold, range, sel,fc1-3,fua, fa, von, aon, clamp, bklit, maxmin 1.2 a 1% 40-400 ac frequency response at 6.000v range 5% 400-2000 hz ac input response for scan mode 10 50000 hz ac/dc voltage scan mode sensitivity @1khz vr1(10m input impedance) 300 450 600 mv ac/dc current scan mode sensitivity@1khz adp, ivsl and ivsh 8 10 12 mv rdc scan mode res sensitivity parasitic capacitance allowed in 3.000m range 200 pf rdc scan mode diode sensitivity forward voltage 0.8 v rdc scan mode cap sensitivity 400 pf reference voltage temperature coefficient tc rf 100k ? resister between vrh 0 ver 2.9 7 10/06/25 es51926 3000 counts smart dmm 1.1.2 hcf detection es51926 provides detection of high-crest-f actor (hcf) signal in acv auto range mode. es51926 senses the signal and determ ines it as hcf if the vpp is large enough. once the signal is determined as hcf, es51926 will jump up one measuring range regardless of current meas urement value. it takes 60ms to jump one range up. the jumping up process will continue until the maximum range is reached. with hcf detection, a more accurate result could be obtained. for example, when a input signal with v pp=200v, vrms=40v(cf=5) was applied, traditional dmm might stay at 30v range but shows counts with the amount of error up to 10% or even bi gger. the error rises from limited input/output swing at internal adc. with hcf detection, dmm will stay at 300v range and exhibits more accurate results. 1.1.3 ef mode es51926 supports a non-contact ac voltage m easurement, which is called electric field measurement also. the ef mode is selected by sel key when ef_en is active. the adc input is configured from adp pin vs. sgnd . when no or less electric field is detected, the lcd shows ?ef?. if the detector senses electric field, the strength will be showed on lcd by ?-? not digits type. level 1(weak) is ?-? and the level 4(strong) is ?----? . additional beeper will be output from buzout pin. the buzzer frequency depends on th e strength of electric field also. the faster beeper means the stronger electric field (ac voltage) is sensed. ver 2.9 8 10/06/25 es51926 3000 counts smart dmm 1.2 current measurement 1.2.1 for multi-meter application es51926 has 2 automatic and 1 manual current measurement modes for multi-meter. the following table summarizes the full-scale range of each mode. when es51926 operates in the current measurement modes for multi-meter, it takes high input from pi n ivsh or ivsl, low input from pin sgnd and reference voltage from pin vr. mode full scale input terminal full scale automatic1 300.0a / 3000a ivsl/ivsh v.s. sgnd 150.0mv automatic2 30.00ma / 300.0ma ivsl/ivsh v.s. sgnd 150.0mv manual 30.00a ivsh v.s. sgnd 150.0mv 1.2.2 for clamp meter application es51926 has 2 automatic and 4 manual cu rrent measurement modes for clamp meter. the following table summarizes th e full-scale range of each mode. when es51926 operate in the automatic mode1&2, it takes high input from ivsh/ivsl (higher range/lower range), low input from sgnd and reference voltage from vr. when es51926 operate in the manual mode1~4, it takes high input from adp, low input from sgnd a nd reference voltage from va+ & va-. mode full scale input terminal full scale automatic1 300.0a / 3000a ivsl/ivsh v.s. sgnd 300.0mv automatic2 30.00a / 300.0a ivsl/ivsh v.s. sgnd 300.0mv manual1 3.000a adp v.s. sgnd 300.0mv manual2 30.00a adp v.s. sgnd 300.0mv manual3 300.0a adp v.s. sgnd 300.0mv manual4 3000a adp v.s. sgnd 300.0mv ver 2.9 9 10/06/25 es51926 3000 counts smart dmm 1.3 resistance measurement a re-configurable divider automatically provides a suitable full-scale range in resistance measurement mode. the follo wing table summarizes the full-scale ranges and the reference resi stors in each configuration. configuration full scale range relative resistor equivalent value or1 300.0 ? * or1 100 ? or2 3.000k ? vr5 1k ? or3 30.00k ? vr4 10k ? or4 300.0k ? vr3 vr1 100k ? or5 3.000m ? vr2 vr1 1m ? or6 30.00m ? ** vr1 10m ? note: * when auto scan mode is set, con tinuity check is implemented in this range ** when auto scan mode is set, the 30.00m range is omitted 1.3.1 continuity check continuity check shares the same configuration with 300.0 ? manual resistance measurement mode and has buzzer output to indicate continuity. the buzzer generates 2khz beep whenever the reading is less than 30 ? . 1.4 diode measurement diode measurement mode shares the same configuration with 3.000v manual voltage measurement mode and has buzzer output to indicate continuity. the buzzer generates a 2khz sound whenever the reading is less than 30mv. if the test circuit is open or the voltage drop be tween the two ports of the device (diode) under test is larger than 2v, th e lcd panel will show ?ol?. ver 2.9 10 10/06/25 es51926 3000 counts smart dmm 1.5 capacitance measurement the following table summarizes the eight ranges of capacitance measurement mode: configuration full scale ran g e relative resistor c1 3.000nf 20k vr+100k c2 30.00nf 20k vr+100k c3 300.0nf 101k c4 3.000uf 10k c5 30.00uf r9k / r1k c6 300.0uf r9k / r1k c7 3.000mf* r9k / r1k c8 30.00mf** r9k / r1k note: * & ** the c7-c8 both range is not available for auto scan mode in order to obtain an accurate reading, a capacitor must be discharged before measurement begins. the chip has a built -in discharge mode to automatically discharge the capacitor. in discharge mode, the lcd displays ? dis.c? discharging through the chip is quite slow. we recommend users to discharge the capacitor with some other apparatus. 1.6 auto power off mode (apo) 1.6.1 idle time selection es51926 has a default auto power off function. if the meter is idle for more than the given idle time, the chip automatically turns the power off. the idle time to trigger the auto power of f function is determined by pin ?aposel?. if pin aposel is connected to v-, the idle ti me will be set to 3 minutes. if pin aposel is connected to dgnd or floating, the idle time will be set to 10 minutes. when apo happens, the state of the meter is saved. if the apo is necessary to be cancelled, power on th e es51926 when any of the push key, except for hold, is pressed down simultaneously. ver 2.9 11 10/06/25 es51926 3000 counts smart dmm 1.6.2 sleep output the meter enters sleep mode after auto power-off or push sel key to last for 2s. the sleep pin asserts low (-3v) in the sl eep mode, and asserts high (+3v, not 0v) after re-power on. 1.6.3 re-power on after auto power-off is active, pushing any of the push function or changing the measurement function can turn on the meter again. if the meter is re-powered on by changing measurement function, the sa ved state is cleare d. if the meter is re-powered on by push functions, the chip restores the saved state and enters hold mode. the lcd displays the saved value except for the auto scan mode. ver 2.9 12 10/06/25 es51926 3000 counts smart dmm 2. functional modes table measurement mode depends on the logi c level of fc1, fc2, fc3, fua, fa, von, aon and clamp. fc1 fc2 fc3 fua fa von aon clamp functional mode(pushing sel key) input 1 x 0 x x x 0 0 v auto ? v ac ? v dc ? ef* ? v auto ? ? vr1,adp 1 x 0 1 0 x 1 0 i auto ? i ac ? i dc ? i auto ? ?(ua) ivsh/ivsl 1 x 0 0 0 x 1 0 i auto ? i ac ? i dc ? i auto ? ?(ma) ivsh/ivsl 1 x 0 0 1 x 1 0 i auto ? i ac ? i dc ? i auto ? ?(a) ivsh 1 x 0 x x 1 x 1 v auto ? v ac ? v dc ? v auto ? ? vr1 1 x 0 1 0 0 x 1 i ac (300.0a/3000a) ivsh/ivsl 1 x 0 0 0 0 x 1 i ac (30.00a/300.0a) ivsh/ivsl 0 1 0 x x x x x rdc auto ? r ? d ? c ? rdc auto ? ? vr1 0 0 1 x x 0 x 1 i auto ? i ac ? i dc ? i auto ? ?(3.000a) adp 0 1 1 x x 0 x 1 i auto ? i ac ? i dc ? i auto ? ?(30.00a) adp 1 0 1 x x 0 x 1 i auto ? i ac ? i dc ? i auto ? ?(300.0a) adp 1 1 1 x x 0 x 1 i auto ? i ac ? i dc ? i auto ? ?(3000a) adp note: * ef mode could be selected when ef_en is active. 3. push function all the enabled push functions will be reset when the measurement mode is changed by external switch. ch ange measurement mode by sel function will reset enabled range , hold , max/min , and vahz functions. the following table lists the available function versus every measurement mode. sel range hold max/min vahz bklit v scan o x x x o o v ac o o o o o o v dc o o o o o o ef o x x x x o i scan o x x x o o i ac o o* o o o o i dc o o* o o o o rdc scan o x x x x o resistance o o o o x o continuity o x o o x o diode o x o o x o capacitance o o o o x o note: for adp input, range is not available ver 2.9 13 10/06/25 es51926 3000 counts smart dmm 3.1 select function when power on or sel key is pressed longer than one second, es51926 will be power-on reset to auto scan mode, which scanning mode is determined by [fc1-fc3] function set. in auto scan mode, the es51926 automatically selects the appropriate measurement mode and range . pushing the sel key less than one second could select the target measuremen t function. pushing the key larger than two seconds, the es51926 will enter power down mode. if power down mode is entered, only press sel key to last for one second or apply the power to v- terminal could re-power on the es51926. the following figure shows the state transition. push sel key > 1s power on reset v/a ac/dc auto scan r/d/c auto scan ac mode measurement dc mode measurement ef* mode measurement resistance measurement diode measurement capacitance measurement push sel key < 1s push sel key < 1s continuity measurement push sel key > 2s ? enter power down mode push sel key > 1s power on reset v/a ac/dc auto scan r/d/c auto scan ac mode measurement dc mode measurement ef* mode measurement resistance measurement diode measurement capacitance measurement push sel key < 1s push sel key < 1s continuity measurement push sel key > 2s ? enter power down mode note: * available when ef_en is active only ver 2.9 14 10/06/25 es51926 3000 counts smart dmm 3.2 range function range pin switches to and from automatic and manual mode, and while in manual mode, changes the full-scale range . the following figure shows the state transition. automatic mode manual mode 1 push < 1 sec 1 push > 1 sec 1 p ush < 1 sec range up 3.3 hold and delay-hold function the data hold mode makes the meter stop updating the lcd panel. this mode can be nested in most of the specia l modes. in auto scanning mode, the hold key is not available. enabling hold func tion in automatic mode makes the meter switch to manual mode. hold functi on can be cancelled by changing the measurement mode, pressing range , or push hold again. the delay-hold function is enabled when hold key is pressed larger than 2 seconds. when delay-hold function is ente red successfully, the meter will stop to update the lcd data after six seconds delayed. during the six seconds waiting, the hold symbol on lcd panel will be blinking. normal mode (auto/manual) hold mode (manual) push < 2s delay state (auto/manual) push > 2s push < 2s push < 2s push > 2s 6sec past ver 2.9 15 10/06/25 es51926 3000 counts smart dmm 3.4 max/min + hold function the meter displays the maximum or mi nimum value of the input in max/min mode. when max/min is pressed for the first time, the meter displays the maximum value. the meter di splays the minimum value, when it is pressed again. when max/min is pressed for the third time, the meter displays current value. the meter returns to normal operation if max/min is pressed and held for longer than one second. pressing hold key in max/min mode makes the meter stop updating the maximum or the minimum value. original state (automatic/manual) ?max? active max value ?min? active min value ?max? ?h? active hold max value. ?min? ?h? active hold min value. push hold push hold 1push<1s 1 push>1 sec 1 push>1s 1 push<1s ?max? ?min? blink current value 1push<1s push hold ?max??min? ?h? blink hold current value. 1push<1s 1push<1s 1 push>1 sec 1push<1s 1push<1s 3.5 vahz function when voltage or current measurement m ode is selected, the vahz funtion is available. push vahz key to select this freq uency measurement mode. the frequency is measured by auto ranging. the maximum frequency range is 100khz. the sensitivity of signal input is 10% full scale of voltage or current mode typically. configuration range fr1 3.000khz fr2 30.00khz fr3 100.0khz ver 2.9 16 10/06/25 es51926 3000 counts smart dmm 3.6 back light function when bksel is set to dgnd or floating, push the bklit key to enable the back light output driving on/off. if the auto ba ck light configuration is active, the bklit becomes a control input for external li ght sensed circuit. set to low for one second to active the back light output drivi ng. set to high then th e driving output is inactive immediately. bksel configuration dgnd or floating normal back light function v- auto back light function 4. miscellaneous the conditions, which the meter turns on the buzzer, include: (1) changing measurement mode generates one beep. (2) pressing any of the push functions genera tes one beep, if the function is valid. (3) power on and re-power on generate one beep. (4) input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) continuity (diode) check generates a continuous 2khz beep whenever the measurement is less then 30 ? (30mv) (6) auto power off or power down by sel key generates a 2khz beeper that lasts for 1.5 seconds. the following figures show the output waveform from the buzout pin. 0.5 ms (a) continuous 2khz beep 0.3 sec 0.15 sec (b) 3.33 beep/sec ver 2.9 17 10/06/25 es51926 3000 counts smart dmm 4.1 lcd configuration seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 bp1 scan auto a4 manu a3 hold apo bp2 ac f4 b4 f3 b3 f2 a2 b2 bp3 - dc e4 g4 e3 g3 e2 g2 c2 bp4 batt dp3 d4 c4 d3 c3 dp2 d2 dp1 seg10 seg11 seg12 seg13 seg14 seg15 bp1 a1 2 m n max bp2 f1 b1 m 2 k 1 min bp3 e1 g1 v ? m 1 bp4 d1 c1 a f hz batt dc ac scan auto manu hold n m f a k hz 1 1 2 m 2 v m ? max min s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s15 s13 s14 s12 bp2 bp3 bp4 bp1 apo ver 2.9 18 10/06/25 es51926 3000 counts smart dmm lcd backplane waveform 4.2 lcd display on condition v- +3.2 lcd annunciates condition v in voltage measurement mode, and diode measurement mode. a in current measurement mode. ? in resistance measurement mode, and continuity mode. f in capacitance measurement mode. in continuity check mode. in diode mode. hz in vahz frequency mode. dc in dc voltage or dc current mode. ac in ac voltage or ac current mode. scan when auto scan mode is selected auto when automatic full scale range selection is enabled. manu in manual mode. when the reading is exceeding 30v in dc v or acv, the dnager symbol will be displayed on hold when hold function is enabled. when delay-hold is selected, the hold symbol will be blinking for 6 seconds. max / min when max or min function is enabled. m 1 in capacitor measurement mode and the fu ll scale range is in the order of mf. 1 in capacitor measurement mode and the fu ll scale range is in the order of uf. n in capacitor measurement mode and the fu ll scale range is in the order of nf. m 2 in voltage or current measurement mode and the full scale range is in the order of 10 -3 . 2 in current measurement mode and the fu ll scale range id in the order of ua. m in resistance measurement mode and th e full scale range is in the order of m ? k in resistance measurement mode and th e full scale range is in the order of k ? apo when auto power off function is enabled. v- +3.2 v- v- v- +3.2 v- v- +3.2 v- v- +3.2 v- ver 2.9 19 10/06/25 es51926 3000 counts smart dmm test circuit 6. low battery 68 0 k 2 70k ba tt l bat 9 v - ag n d 0. 1 u 0v 9v d1 15k ovsg or 1 vr5 vr4 vr 3 vr2 v r 1 10 0 1 k 10 k 10 1 k 10 m ado ad i a cv l acvh v r d2 10k 10 k 15k + 1. 0 u +4.7u 1 . 111 m - 40 0m v te s t 5 vol tag e i npu t agnd 1. voltage test 100 1. 5k ptc z1 6v ovsg 1 0 m 1. 1 1 1m ovh vr1 vr2 5 . diode test agnd z2 4. current test 100k 100k 450 50 4.5 0. 4 95 0. 00 5 ma ma ua u a ua ma ivsl ivsh agnd a sgnd 30 a r l vr 100k r adp sgnd 3. current test for clampmeter agnd 100 1. 5k pt c z 1 6v ovh 2. resistance test ovsg or1 vr5 vr4 vr3 vr2 1 00 1k 1 0 k 1 01k 1 . 111m ovx sgnd agnd z2 ohmc4 ohmc3 ohmc2 ohmc1 22n 220n 470n 47n adp 60m 7. ef test efin+ sgnd agnd efin- 100k va + va - 400mv ver 2.9 20 10/06/25 es51926 3000 counts smart dmm application circuit a.) ac average rectified circuit notes: 1. the esd protection circuits protect most of pins. however pins, v+, v-, agnd, dgnd and vr1 are not protected enough because the parasitic effect must be decrease. ther efore enough external protection is needed for assembling, carrying and keeping. in addition, components connecting to these unprotected pins have to be soldered on board before the ic is soldered. 2. all the zener diodes above are used for ic protection . these protections are needed and these zener diodes must be soldered on pcb first before soldering es51926 on. 3. the ovx pin resistance have to be kept below 120k for the capacitance mode accuracy (3/30nf range). for higher voltage prot ection, additional configuration of ptc protection is necessary. 1 2 3 4 56 a b c d 6 5 4 3 2 1 d c b a title number revision size b date: 30-aug-2007 sheet of file: d:\protel file\es51928 serial.ddb drawn by: r16 10k vr2 10k d1 1n4148 d2 in4148 + c17 1uf r21 15k r22 15k test5 adi acvh ado acvl average circuit es51926 3000 counts smart dmm application circuit ( average ) agnd 1 lbat 2 cref+ 3 cref- 4 cint 5 caz 6 buff 7 raz 8 ivsh 9 ivsl 10 ovx 11 ovh 12 ovsg 13 or1 14 vr5 15 vr4 16 vr3 17 vr2 18 test5 19 acvl 20 acvh 21 adi 22 ado 23 ohmc4 24 ohmc3 25 ohmc2 26 ohmc1 27 nc 28 vrh 29 vr 30 sgnd 31 adp 32 va+ 33 va- 34 nc 36 vr1 35 ca- 37 ca+ 38 r9k 39 r1k 40 sleep 41 buzin 42 aposel 43 buzout 44 acen 45 nc 46 nc 47 nc 48 nc 49 nc 50 bkout 51 annunc 52 bp4 53 bp3 54 bp2 55 bp1 56 efen 57 bklit 58 max/min 59 range 60 vahz 61 sel 62 hold 63 fc1 64 fc2 65 fc3 66 fua 67 fa 68 aon 69 von 70 clamp 71 seg15 72 seg14 73 seg13 74 seg12 75 seg11 76 seg10 77 nc 78 nc 79 seg09 80 seg08 81 seg07 82 seg06 83 seg05 84 seg04 85 seg03 86 seg02 87 seg01 88 osc2 89 osc1 90 bksel 91 cesel 92 c+ 93 c- 94 v- 95 v- 96 v+ 97 v+ 98 dgnd 99 agnd 100 u1 es51926 c9 0.1uf c7 220nf c8 220nf r7 220k r8 75k r9 100k r10 100k ivsh ivsl r6 100k c6 220pf r17 1.5k ptc r11 100 vr1 20k r12 100 r13 1k r14 10k r15 101k r18 1.11m acvl acvh ado c11 22nf c13 220nf c14 470nf c15 47nf vr3 10k r23 27k r19 56k va+ va- r20 10m vr1_10m c16 470nf c18 220nf r26 9k r25 1k bz1 buzzer sw9 sw_non lock sw18 sw_lock zr9 5.6v sleep aposel buzin v - sw10 sw_non lock sw11 sw_non lock sw12 sw_non lock sw13 sw_non lock sw8 sw_non lock bklit mzx/min range vahz sel hold bklit mzx/min range vahz sel hold annunc bp4 bp3 bp2 bp1 sw19 sw_lock sw20 sw_lock sw21 sw_lock sw22 sw_lock sw17 sw_lock sw16 sw_lock sw15 sw_lock sw14 sw_lock efen fc1 fc2 fc3 fua fa aon von clamp fc1 fc2 fc3 fua fa aon von clamp efen v - seg12 seg13 seg14 seg15 seg11 seg10 seg09 seg08 seg07 seg06 seg05 seg04 seg03 seg02 seg01 y1 4mhz bksel cesel c5 0.47uf + c12 1uf vr v - function switch seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 seg10 seg11 bp1 bp2 bp3 bp4 seg12 seg13 seg14 seg15 bt1 3v + c2 0.1uf zr3 5.6v + c1 10uf + c4 0.1uf + c3 10uf v- zr8 zr7 r24 100k 1 j5 adp zr4 7.5v r1 sw1 sw spdt r3 r4 1 j2 60a 1 j4 gnd 1 j3 r / c / d / cont. sw2 ua sw3 ua sw4 ma sw5 ma sw6 60a sw7 sw spst vr1_10m zr1 zr5 zr2 zr6 r2 r5 450 45 4.5 0.495 0.005 lcd panel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 j1 con19 + c10 4.7uf lbat test5 adi ver 2.9 21 10/06/25 es51926 3000 counts smart dmm b.) ac rms circuit notes: 1. the esd protection circuits protect most of pins. however pins, v+, v-, agnd, dgnd and vr1 are not protected enough because the parasitic effect must be decrease. ther efore enough external protection is needed for assembling, carrying and keeping. in addition, components connecting to these unprotected pins have to be soldered on board before the ic is soldered. 2. all the zener diodes above are used for ic protection . these protections are needed and these zener diodes must be soldered on pcb first before soldering es51926 on. 3. the ovx pin resistance have to be kept below 120k for the capacitance mode accuracy (3/30nf range). for higher voltage prot ection, additional configuration of ptc protection is necessary. 1 2 3 4 56 a b c d 6 5 4 3 2 1 d c b a title number revision size b date: 30-aug-2007 sheet of file: d:\protel file\es51928 serial.ddb drawn by: c9 0.1uf c7 220nf c8 220nf r8 220k r9 75k r10 100k r11 100k ivsh ivsl r6 100k c6 220pf r7 1.5k ptc r12 100 vr1 20k r13 100 r14 1k r15 10k r16 101k r17 1.11m acvl acvh ado c10 22nf c12 220nf c13 470nf c14 47nf vr3 10k r21 27k r22 56k va+ va- r23 10m vr1_10m c15 470nf c21 220nf r24 9k r26 1k bz1 buzzer zr9 5.6v sleep aposel buzin v - bklit mzx/min range vahz sel hold annunc bp4 bp3 bp2 bp1 efen fc1 fc2 fc3 fua fa aon von clamp seg12 seg13 seg14 seg15 seg11 seg10 seg09 seg08 seg07 seg06 seg05 seg04 seg03 seg02 seg01 y1 4mhz bksel cesel c5 0.47uf + c11 1uf vr es51926 3000 counts smart dmm application circuit ( trms ) sw17 sw_lock acv / rms bt1 3v + c2 0.1uf zr3 5.6v + c1 10uf + c4 0.1uf + c3 10uf v- zr8 zr7 r25 100k 1 j5 adp zr4 7.5v r1 sw1 sw spdt r3 r4 1 j2 60a 1 j3 gnd 1 j4 r / c / d / cont. sw2 ua sw3 ua sw4 ma sw8 ma sw9 60a sw10 sw spst vr1_10m zr1 zr5 zr2 zr6 r2 r5 450 45 4.5 0.495 0.005 trms circuit + c19 2.2uf vr2 500k +c20 2.2uf vr4 50k r20 47k r19 150 +vs_es7 -vs_es7 r18 10k rl 1 vin 2 pwrdown 3 - vs 4 cav 5 vout 6 + vs 7 com 8 u2 es7 ado acvh + c16 10uf + c17 10uf +vs_es7 -vs_es7 sw6 sw_non lock sw19 sw_lock sw7 sw_non lock sw11 sw_non lock sw12 sw_non lock sw13 sw_non lock sw5 sw_non lock bklit mzx/min range vahz sel hold sw20 sw_lock sw21 sw_lock sw22 sw_lock sw23 sw_lock sw18 sw_lock sw16 sw_lock sw15 sw_lock sw14 sw_lock fc1 fc2 fc3 fua fa aon von clamp efen v - v - function switch seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 seg10 seg11 bp1 bp2 bp3 bp4 seg12 seg13 seg14 seg15 lcd panel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 j1 con19 lbat c18 1uf es7_pwr es7_pwr agnd 1 lbat 2 cref+ 3 cref- 4 cint 5 caz 6 buff 7 raz 8 ivsh 9 ivsl 10 ovx 11 ovh 12 ovsg 13 or1 14 vr5 15 vr4 16 vr3 17 vr2 18 test5 19 acvl 20 acvh 21 adi 22 ado 23 ohmc4 24 ohmc3 25 ohmc2 26 ohmc1 27 nc 28 vrh 29 vr 30 sgnd 31 adp 32 va+ 33 va- 34 nc 36 vr1 35 ca- 37 ca+ 38 r9k 39 r1k 40 sleep 41 buzin 42 aposel 43 buzout 44 acen 45 nc 46 nc 47 nc 48 nc 49 nc 50 bkout 51 annunc 52 bp4 53 bp3 54 bp2 55 bp1 56 efen 57 bklit 58 max/min 59 range 60 vahz 61 sel 62 hold 63 fc1 64 fc2 65 fc3 66 fua 67 fa 68 aon 69 von 70 clamp 71 seg15 72 seg14 73 seg13 74 seg12 75 seg11 76 seg10 77 nc 78 nc 79 seg09 80 seg08 81 seg07 82 seg06 83 seg05 84 seg04 85 seg03 86 seg02 87 seg01 88 osc2 89 osc1 90 bksel 91 cesel 92 c+ 93 c- 94 v- 95 v- 96 v+ 97 v+ 98 dgnd 99 agnd 100 u1 es51926 ver 2.9 22 10/06/25 es51926 3000 counts smart dmm package information 7.1 100 pin lqfp package 7.2 dimension parameters |
Price & Availability of ES5192610
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |