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ES51961 3 3/4 manu dmm 2002/11/28 1 features ? 3 3/4 digits manual and bargraph display ? multiple function system ? logic probe, logic high level 4.0v, 2.4v, 1.5v selectable, 20 mhz ? analog to digital converter ? frequency counter (400 mhz) ? op amplifier ? full scale range change by 2, 10, 20, 5, 10 ? peak hold, catch the p max and p min (<10 us) ? data hold, max/min hold, relative data function ? zoom function of bargraph ? overrange outputs, can be controlled by range pin ? ph1~ph4 for capacitor measurement ? rs232 ? low battery detect for 3v/9v battery ? crystal or on chip rc oscillator ? auto-power-off then hold the final data and re-power-on function ? reset function ? back light function ? voltage reference for resistor measurement ? point setting, bargraph disable ? on chip buzzer driver ? lcd segment check ? 3v dc power supply ? 100 pin flat-package description the ES51961 is a 3 3/4 digits and bargraph lcd display measurement system which combines integrated analog-to-digital converter (adc), frequency counter, logic level tester and op amplifier, which is operated with 3v dc power supply. the ES51961 is suited to voltage, current, resistance, diode, continuity, temperature, logic probe and frequency measurement to 400 mhz. the frequency counter can automatically adjust its range to match the input frequency or manual setting, over six ranges selectable. the logic level probe permits ES51961 to function as a logic probe and display logic high voltage level on the lcd display and turn on a piezoelectric buzzer. the other functions are provided for max and min holding, data holding, peak data holding, relative data, low battery detection, backlight, zoom, reset, range, auto-power-off , re-power-on circuit and rs232 data output.
ES51961 3 3/4 manu dmm 2002/11/28 2 absolute maximum ratings characteristics ratings supply voltage (v- to agnd) -4v analog input voltage v+ to v- digital input v- to dgnd power dissipation,flat package 500mw operating temperature 0 to 70 storage temperature -40 to 125 electrical characteristics ta=25 , v- = -3v symbol parameter test condition min. typ. max. unit v- power supply -3.5 -3.0 -2.2 v idd iss operating supply current normal power on auto-power-off - - 1.3 5 2.0 10 ma ua rev reb rollover error (voltage x 1 ) rollover error (bargraph) 1m input resistor - - - - 0.1 0.5 f.s. f.s. nlv nlb nonlinearity (voltage x 1 ) nonlinearity (bargraph) best case straight line - - - - 0.1 0.5 f.s. f.s. input leakage - 1 10 pa internal low battery flag voltage (for 3v battery) v- to agnd -2.5 -2.3 -2.1 v zero input reading 1m input resistor -000 000 +000 count v12 reference voltage 100k between v12 and agnd -1.3 -1.2 -1.1 v v05 reference voltage 100k between v05 and agnd -0.57 -0.50 -0.43 v lcd drive voltage, annunc -3.5 Q v- Q -2.2 2.9 3.2 3.5 v counter time base period fosc=4mhz - 1 - sec internal pull high to 0v current bklit,range,set, dp1,dp2,bdis, buzin,xtal,reset, fc1,fc2,fc3,m2, m10,d10,zoom, peak,rel,max/min hold (which is connected to v-) - 1.2 -ua
ES51961 3 3/4 manu dmm 2002/11/28 3 electrical characteristics (cont.) tcrf reference voltage temperature coefficient 100k between v12 and agnd 0 ta 70 - 50 - ppm/ buzzer frequency fosc = 4m hz 2.5 khz lcd drive frequency 78 hz v l l logic low reference voltage logic test dc 0.8 v v l h1 v l h2 v l h3 logic high reference voltage logic test dc 4.0 2.4 1.5 v v v maximum and minimum peak value accuracy (10 us) ? 10nf ? (polyester, mylar) 2% 10 f.s. count pin description pin symbol type description 1 agnd g analog ground. 2 agnd g analog ground. 3 v+ p positive supply voltage, output of on-chip dc-dc converter. 4 v+ p positive supply voltage, output of on-chip dc-dc converter. 5 zh o output to rc filter for zoom mode 6 zl i input from rc filter for zoom mode 7 ch+ i/o high speed positive conne ction for reference capacitor. 8 ch- i/o high speed negative c onnection for reference capacitor. 9 cih o high speed integrator output. connected to integration capacitor. 10 bufhd10 o integration resistor (1 m ) connection for high speed buffer 10 output. 11 bufh o integration resistor (100 k ) connection for high speed buffer output. 12 bufhm10 o integration resistor (10 k ) connection for high speed buffer 10 output. 13 cazh o high speed auto- zero capacitor connection 14 cl+ i/o high resolution positive connection for reference capacitor. 15 cl- i/o high resolution negative c onnection for reference capacitor. 16 cil o high resolution integrator output . connected to integration capacitor. 17 cazl o high resolution auto -zero capacitor connection. 18 bufld10 o integration resistor (1 m ) connection for high resolution buffer 10 output. 19 bufl o integration resistor (100 k ) connection for high resolution buffer output. 20 buflm10 o integration resistor (10 k ) connection for high resolution buffer 10 output.
ES51961 3 3/4 manu dmm 2002/11/28 4 pin symbol type description 21 v05 o reference voltage output -0.5v to agnd for resistor measurement. 22 v12 o reference voltage output -1.2v to agnd. 23 reflo i low differential re ference input connection 24 refhi i high differential reference input connection 25 vin+ i high analog input signal connection. 26 vin- i low analog input signal connection. 27 p max i/o maximum peak hold output. 28 p min i/o minimum peak hold output. 29 op+ i op + terminal input. 30 op- i op ? terminal input. 31 opo o op output. if this op is not used, let opo saturate to v+ can save power. for example, let op+=0v and op-=-3v. 32 or o overrange output. it could be controlled by range pin. 33 pkin i peak hold ( v.s. agnd ) or logic probe ( v.s. v- ) input pin . 34 bklit i back light control pin. puls e low to make this function active. 35 sleep o when auto-power-off happen, this pin output will change from v+ to v-. if re-power-on happen, the out put will change from v- to v+. 36 int o integration cycle output (100 ms). 37 range i semiauto/manual mode and manua l range selecting. pulse low to make this function active. 38 set i input to set serial data output. pulse low to make this function active. 39 mp i ranges setting for max/min or peak mode. 40 dp1 i decimal point control for voltage measurements. 41 dp2 i decimal point control for voltage measurements. 42 freq i frequency counter input, biased to 1/2 v- by ic internal circuit. 43 bdis i when connected to v-, bargraph will be disabled (voltage mode). 44 annunc o square-wave output at the backpl ane frequency, synchronized to bp1. annunc can be used to control display annunciator. connecting a lcd segment to annunc will turn it on; connecting a lcd segment to its backplane will turn it off. 45 | 67 seg23 | seg01 o o lcd segment line 23. | lcd segment line 01. 68 bp1 o lcd backplane 1. 69 bp2 o lcd backplane 2. 70 bp3 o lcd backplane 3. 71 bp4 o lcd backplane 4. 72 ph1 o phase1 output, for capacitor measurement. 73 ph2 o phase2 output, for capacitor measurement. 74 ph3 o phase3 output, for capacitor measurement. 75 ph4 o phase4 output, for capacitor measurement. 76 buzout o buzzer output. audio frequenc y (2.5 khz) output which drives a piezoelectric buzzer.
ES51961 3 3/4 manu dmm 2002/11/28 5 pin symbol type description 77 buzin i buzzer control input. when connected to v-, turns the buzzer on. (2.5 khz continuity signal) 78 osc2 o crystal oscillator (output) connection. 79 osc1 i crystal oscillator (input) connection. 80 xtal i when unconnected or connected to dgnd, the oscillator frequency is generated by external crystal. when connected to v-, the frequency is decided by internal rc oscillator. 81 reset i pulse low to clear the push function and counter. 82 fc1 i switch 1 for function selection. 83 fc2 i switch 2 for function selection. 84 fc3 i switch 3 for function selection. 85 m2 i when connected to v-, the integration full voltage will be 200mv instead of 400mv. 86 m10 i when connected to v-,the integration full voltage will be 40mv instead of 400mv. 87 d10 i when connected to v-, the integration full voltage will be 4v instead of 400mv, and the absolute value of input voltage must 2v. 88 zoom i zoom function select and logi c function setting (buzzer on state). 89 peak i peak hold control pin, pulse low can make this function active. 90 rel i relative control pin. pulse low to make this function active. 91 max/min i pulse low to make this function active. 92 hold i pulse low to make this function active. 93 bkout o if bklit pin is pushed, this pin output will change from v- to v+ for 60 sec then returned to v- again, the driving current is about 1 ma. 94 sdo o rs232 output pin. 95 c+ o positive capacitor connection for on-chip dc-dc converter. 96 c- o negative capacitor connecti on for on-chip dc-dc converter. 97 lbat9 i low battery voltage setting. if us ed 3v battery, connected this pin to agnd, the default low battery voltage will be -2.3v. for 9v battery power, if this pin input is sm aller than v12 (-1.2v), the lcd annunciator ?batt? will be displayed. 98 v- p negative supply voltage. connect ing to battery negative terminal. 99 v- p negative supply voltage. connect ing to battery negative terminal. 100 dgnd g digital ground, connected to battery positive terminal. *type: i=input, o=output, p=power, g=ground
ES51961 3 3/4 manu dmm 2002/11/28 6 pin configuration v+ s d o cil czal cih cazh bufld10 bufh vin+ vin- r a n g e p k i n b k l i t h o l d r e l a n n u n c f r e q m p bp1 bp2 bp3 seg1 seg2 seg3 seg4 seg5 seg6 seg7 seg8 seg9 seg10 seg11 seg12 seg13 seg14 s e g 1 8 s e g 1 9 s e g 2 0 osc1 osc2 buzout buzin v - c + c - cl+ cl- ch+ ch- v+ 35 30 50 55 100 90 85 agnd refhi reflo s l e e p agnd d g n d v - 5 10 15 20 25 40 45 60 65 70 75 80 95 m a x / m i n l b a t 9 p e a k xtal f c 2 m 1 0 d 1 0 o r bp4 f c 1 ph1 ph2 ph3 ph4 r e s e t b k o u t seg17 seg16 seg15 op+ op- o p o v12 v05 m 2 d p 1 d p 2 b d i s p bufhd10 zh i n t f c 3 z o o m zl bufl buflm10 p bufhm10 s e t s e g 2 3 s e g 2 2 s e g 2 1 max min cazl
ES51961 3 3/4 manu dmm 2002/11/28 7 operation mode switch description measurement mode are depend on the logic levels of fc1, fc2, fc3. fc1 fc2 fc3 mode overflow beep peak zoom bdis 1 1 1 volt1 (*1) o o o o 110volt2 o x o o 101volt3 x o o o 100volt4 x (*2) o o 0 1 1 continuity x x x x 0 1 0 frequency (*3) x x x x 0 0 0 logic (*4) x x (*5) x 001diode x x x x *1: the lcd will show "ol" if reading is over 2000 counts if turns d10 function on. *2: if peak connects to v-, the si gn annunciator "-" will not display. *3: the range can be changed by range pin. *4: the logic high level reference volta ge level can be changed by range pin. *5: this pin is used to change the voltage level of buzzer on. analog section the ES51961 design incorporates ?zi?, ?az?, ?int?, ?dint? four phases which is a dual slope a/d converter. the adc system including high speed and high resolution two parts. its timing setting is as follow: voltage: mode high resolution high speed zi az 100m sec 150m sec 20m sec 5m sec int 100m sec 10m sec dint 400m sec 40m sec voltage+m2: mode high resolution high speed zi az 100m sec 150m sec 20m sec 5m sec int 100m sec 10m sec dint 200m sec 20m sec
ES51961 3 3/4 manu dmm 2002/11/28 8 voltage+peak: mode high resolution high speed zi az 100m sec 150m sec 20m sec 5m sec int 100m sec 10m sec dint 500m sec 50m sec voltage+peak+m2: mode high resolution high speed zi az 100m sec 150m sec 20m sec 5m sec int 100m sec 10m sec dint 250m sec 25m sec the relation between the s cale range and bar meaning scale enabled pin input full range normal mode bar meaning zoom mode bar meaning 1 default or m10 & d10 400mv 10mv 1mv 10 m10 40mv 1mv 1mv 2 m2 200mv 5mv 0.5mv 20 m10 &m2 20mv 0.5mv 0.5mv 10 d10 2000mv 100mv 10mv 5 d10 & m2 2000mv 50mv 5mv * if m2, m10, d10 is changed unde r mp="h", the original enabled function (ex: hold, max/min, rel, peak) and the input data will be reset, but the or output will not be changed. on the contrary, when mp="l", see the explication of mp and or at page 15 please. * when m2, m10, or d10 is changed, we must recalibrate if we will use peak function again. logic probe (1)logic state & high voltage level & buzzer on level there are three kind of independen t logic high level, 4.0v, 2.4v and 1.5v (changed by range pin), and bu zzer on "h", "-" and "l" level (changed by zoom pin) can be selected individuall y. the logic low level is always 0.8v and the response frequency is 20mhz.
ES51961 3 3/4 manu dmm 2002/11/28 9 logic probe input high should conne ct to pkin pin, the logic probe input low should connect to v- pin ( not vin- pin), so the maximum voltage difference between logic high & low can be 6v. example: the above panel means now is logic high (the input > 4.0v) and the buzzer turn on. the above panel means now is logic unknown (the input between 0.8v~2.4v) and once the logic leve l change to high (>2.4v), the buzzer will turn on. logic high level setting buzzer on level present logic state the default logic mode panel
ES51961 3 3/4 manu dmm 2002/11/28 10 the above panel means now is logi c high (the input > 1.5v) and once the logic level change to low (<0.8v), the buzzer will turn on . the above panel means now is logi c low (the input<0.8v) and once the logic level change to unknown (0.8v~4.0v), the buzzer will turn on . (2) the relation between the input and lcd annunciator <1> pulse low input hi lo 300 ms 0.1 us <2> pulse high input hi lo 300 ms 0.1 us <3> period input 600 ms 600 ms 300 ms 300 ms hi lo
ES51961 3 3/4 manu dmm 2002/11/28 11 frequency counter the timebase of ES51961 is derived by a crystal or internal rc clock oscillator. the timebase of counter is : 4,000,000 tcount = fosc thus, the counter will operate with a 1 second timebase when a 4mhz crystal oscillator is used. for accurate freque ncy measurement, a cr ystal oscillator is recommended. the frequency counter can automatically select the proper range. autorange operation extends over five decades from 1 hz to 399.9 mhz. range full scale fr1 fr2 fr3 fr4 fr5 fr6 3.999 khz 39.99 khz 399.9 khz 3.999 mhz 39.99 mhz 399.9 mhz <4> period input(10m) 0.1 us hi lo <5> unknow vh(4.0,2.4,1.5v) vl(0.8v) input 300 ms 300 ms 0.5~1 ms
ES51961 3 3/4 manu dmm 2002/11/28 12 continuity if the input voltage (vin+~vi n-) make the bargraph number 3, a 2.5 khz signal will come out from buzout pin. diode if the input voltage (vin+~ vin-) high resolution counts 2000, the lcd will display ?ol? and no overflow beep exist. if the bargraph number 3, a 2.5 khz signal will come out from buzout pin. push mode the relation between hold, m ax/min, rel, peak function. enable mode active mode hold peak max/min rel (1)hold x x x (2)peak o x x (3)max/min o x x (4)rel o x x *1: if hold function is enabled, th en max/min, rel, peak function is disabled. *2: if peak function is enabled, then rel, max/min function is disabled, but hold function still can be actived. *3: if max/min function is enabled, th en rel, peak function is disabled, but hold function still can be actived. *4: if rel function is enabled, then peak, max/min function is disabled, but hold function still can be actived (1) hold and reset: reset (semiauto) data hold 1 push *1: if continue to press the hold pin (logic low) then power on the ES51961, and release it in 1.2 sec, the all segments will bright until pressing the hold pin again. *2: every time this reset pin pulse to low (0.8~1.6ms), the pushed function (hold, max/min, r el, peak, zoom except bklit), auto-power-off function and counter will be reset.
ES51961 3 3/4 manu dmm 2002/11/28 13 (2) rel+hold: reset (semiauto) "rel" blink the di(n) value 1 push<1 sec "rel" active the relative value 1 push <1 sec 1 push >1 sec "rel" & "h" active holded relative value "rel" blink & "h" active the di(n) value push hold push hold 1 push<1 sec note: 1.when rel function is enabled: display = di(n+k) di(n), k = 0, 1, 2, 3, ... di(n): the reference di(n+k): next k step input reading. 2. if the input value di(n) or di(n+k) R ( 4000), the relative value will display ?ol?. (3) max/min+hold: reset (semiauto) "max" active max. value 1 push > 1 sec 1 push < 1 sec "min" active min. value "max" & " min" blink current value "max" & "h" active holded max. "min" & "h" active holded min. "max" & "min" & "h" blink current value 1 push < 1sec push hold push hold push hold 1 push < 1sec
ES51961 3 3/4 manu dmm 2002/11/28 14 (4) peak: reset (semiauto) 1 push > 2 sec 1 push <1 sec 1 push < 1 sec 1 push > 1 sec calibration 1 push > 2 sec "pmax" active max. peak value "pmin" active min. peak value (manu) end(*5) (*1): push range > 1 sec (*1) end(*4) *2: under the reset (semiauto) or peak mode, if press peak > 2 sec, the peak function will enter to calibration mode, the lcd will show "cal." and the internal buffer will remember the internal op offset voltage then back to the manual mode. whenever the peak function is enabled again, the reading value will minus the offset voltage, the purpose is to get the real peak reading. *3: under peak mode, the bargraph always show current value. *4, *5: please see page 16 note 3. (5) range: the ranges of voltage, frequency and logic modes is selected by range pin. the following are the ope ration flow chart of them. voltage mode: frequence mode: logic mode: reset (semiauto) manu 1 push < 1 sec 1 push > 1 sec 1 push < 1 sec (change or's state) reset (automatic) manu 1 push < 1 sec 1 push > 1 sec 1 push < 1 sec (change measuring range) default (4.0v) 1 push can change the logic high reference voltage between 4.0, 2.4 and 1.5v.
ES51961 3 3/4 manu dmm 2002/11/28 15 mp the default state is h (0v). when mp="h", if turn max/min or peak on, or and range keep original state. if mp=?l?, whether the original state of or is ?h? or ?l?, if active max/min or pe ak, the or?s state will be set to ?h?. or this pin is used to set/indicate the measured ranges. the criterion of or pin changing are: (1) if under continuity, frequency, logic or diode mode, the or is always l. (2) under volt1~volt4 mode and mp="l", if max/min or peak active, the or="h". (3) except situation (1), (2) (i.e. volt1~ volt4 mode and mp=?h?), if turning hold, max/min, rel, peak on, the system will enter into manual mode and or keep its original state. (4) except situation (1)~(3), under semiauto mode, if (fc1,fc2,fc3)=(1,1,1) and d10 on, then (i) or ? "h", if high resolution 2000 counts (ii) or keeps its original state, if 380 high resolution <2000 counts (iii) or ? "l", if high resolution <380 counts (5) except situation (1)~(4), under semiauto mode the state of or is: (i) or ? "h", if high resolution 4000 counts (ii) or keeps its original state, if 380 high resolution <4000 counts (iii) or ? "l", if high resolution <380 counts note: 1. there are several situations between mp and or pins. as follow: (1) mp="h": the state of or pi n can be set by range pin. and if we push max/min or peak key under semiauto mode, the meter will enter into manual mode and the or pin keeps its original state. (2) mp="l": the state of or pin can be still set by range pin. but if we push max/min or peak key under semiauto or manual mode, the or pin will change to "h".
ES51961 3 3/4 manu dmm 2002/11/28 16 2. besides, if we have already turned max/min or peak function on, the relationship between mp and or can restate: (1) mp="h": if the states of m 2, m10 or d10 are changed by or or rotating mode , then max/min or peak function will be reset. though the state of or pin isn't ch anged again , it can be changed by range pin. (2) mp="l": if the states of m 2, m10 or d10 are changed by or's state, the max/min or peak functi on keep in its original state. 3. under peak calibration mode, (1) mp="h": when calibration is end, the meter will back to manual mode (2) mp="l": when calibration is e nd, the meter will back to its original mode (manual or semiauto) before the function happen. 4. whatever mp = "h" or "l", the hold, rel, max/min or peak complete, the meter will back to the original mode (manual or semiauto) before these functions happen. zoom (1) voltage mode the default status of the bargraph disp lay is from left to right. once this function is pushed, the bargraph display will change to zoom mode. (2) logic mode this pin is used to turn on th e buzzer whether is under high, low or unknown logic (the default is high beep). bklit when this pin bklit is pushed, th e bkout pin output will change from v- to v+ for 60 sec then returned to v- again, but if this pin is pushed again under 60 sec this function will be canceled
ES51961 3 3/4 manu dmm 2002/11/28 17 decimal point select (under voltage mode) dp2 dp1 decimal point h h none h l point1 l h point2 l l point3 auto-power-off function once power on the ES51961, the auto-pow er-off function will be enabled and if the functions are not changed in 30 minutes, the auto-power-off condition will be happened. when power-off happens, the final data is saved. if continue to push anyone of the push function (e xcept hold pin) then power on the ES51961, the auto-power-off function w ill be disabled, and lcd segment "apo" will be turn off. re-power-on once auto-power-off happens, push anyone of the push function or change the rotary mode can re-power-on the ES51961. when anyone of the push function is enabled, the storage value will display with hold mold (except logic state), if auto-power-off happened under max/min (or peak, rel) mode, the p max , p min , or relative and reference valu e will be keeped. but if re- power-on the ES51961 with rotary mode , the storage value will be clear. sleep when auto-power-off happens, this pi n output will change from v+ to v-, once re-power on happen, this pin out put will change from v- to v+. buzzer (1) the buzzer turns on in the following condition : ? 1 beep: measurement function changed ,power and re-power on ,hold max/min, rel, peak , bklit, set, range or zoom are
ES51961 3 3/4 manu dmm 2002/11/28 18 pushed. ? 3.3 beeps: input reading overrange. ? 2.5 khz continue: continuity mode, diode mode, logic mode. (2) buzzer output waveform: 2.5 khz (continued) 0.4 ms beeps (3.33 beeps/sec) 0.3 sec 0.15 sec serial data output the serial data is output two times from sdo pin on each a/d conversion cycle. the data format satisfy jis 7bit transmission code and the baud rate is 2400, it means the receiver terminal can use rs-232 interface to read data. single package 0 p 1 p 0v -3v lsb msb d0 ~d6 a single package include a start bit (0), d0~d6 (7 bit), a parity check bit (odd) and a stop bit (1). all th e data stream is consist of 110 2 bits. the high and low voltage levels corres pond to dgnd and v- respectively. sdo remains at 1 (high) when it is inactive. hence the start bit (0 ) could be used as the triggering signal to begin the reading process.
ES51961 3 3/4 manu dmm 2002/11/28 19 all package 0 p 1 status1 digit2 digit3 function1 range sataus2 cr lf digit0 digit1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 function2 0 p 1 digit0~3 data is exactly the receiver display number, but the range, function, status1, status2 data all need written program to judge what the data mean. note : lsb bit is sent first, then msb bit. the meter always outputs the current i nput value to the se rial port in spite of hold mode. each block is repeated twice in one conversion cycle. the detailed data format of each packet is listed below. (1) range: under frequency mode the output is as below: range frequency range frequency 0110100 4 khz 0110000 4 mhz 0110110 40 khz 0110001 40 mhz 0110010 400 khz 0110011 400 mhz under the other mode (logic, voltage), the output is 0110100 (2) digit0~3: di g it dis p la y di g it dis p la y 0110000 0 0110101 5 0110001 1 0110110 6 0110010 2 0110111 7 0110011 3 0111000 8 0110100 4 0111001 9 if the input value is overrange (ol), the reading data digit3=4, digit2=0, digit1=0, di git0=0, but under the frequency mode, digit0~ digit3 output the measured value.
ES51961 3 3/4 manu dmm 2002/11/28 20 (3) function: function1: 011 fc1 fc2 fc3 bit7 bit6 bit5 bit4 bit3 bit2 bit1 : "1" is for the negative (-). function2: 0 1 1 manu m2 m10 d10 bit7 bit6 bit5 bit4 bit3 bit2 bit1 manu: "1" is on " " mode, and "0" is on "auto" . (4) status: status1: 011p max p min batt ol bit7 bit6 bit5 bit4 bit3 bit2 bit1 batt: "1" is for the battery voltage is less than 2.3v 0.2v. ol: "1" is for the input overrange. status2: 0 1 1 p2 p1 apo or bit7 bit6 bit5 bit4 bit3 bit2 bit1 apo: "1" is for the auto-power-off function enabled or: "1" means the voltage of or pin is v+. note: 1. under diode mode, if reading is >= 2000 counts, lcd show "ol". 2. under volt1 (ie (fc1, fc2, fc3)=(1, 1, 1) ) & d10 mode, if reading is >= 2000 counts, lcd show "ol". 3. when the offset voltage of peak mode is >= 1000 counts, lcd show "ol". 4. except condition 1., 2. and 3., if input reading is 4000 counts, lcd show "ol". p2 p1 decimal point 0 0 none 0 1 point1 1 0 point2 1 1 point3 (5) cr (back): transmission code "0001101". (6) lf (line feed): transmission code ?0001010?.
ES51961 3 3/4 manu dmm 2002/11/28 21 7. test circuit note: light shielding for diode. reflo refhi vin+ vin- dc in + - 1m (1) dc test -100 mv 0.1u o p - vin+ vin- o p + o p o 88m d1 d2 0.1u 0.47u 10k 5k 22k 22k 1.0u 1.0u ac in (3) ac test reflo refhi -100 mv f r e q 2.2u 200 ptc 1.5k -3v freq in (2) freq input test c1815 npn (4) peak function test ac/dc rectifier pkin vin+ 1m 470 0.1u ptc 2.2k 400 mv input dc ac under voltage mode, if peak function is enabled, pkin input will be enable d 0v (5) logic test pki n 470 ptc 2.2k logic high (red) v- logic low (black) (6) low battery test(9v) ES51961 680k 270k battery lbat9 v- agnd 0.1u 0v 9v
ES51961 3 3/4 manu dmm 2002/11/28 22 8. application circuit cazl
ES51961 3 3/4 manu dmm 2002/11/28 23 9. the other (1) lcd pin assignment bp1 bp2 bp3 bp4 seg1 seg2 seg3 bp4 apo - bp3 bar0 bar- bp2 bar1 bar3 bar5 bp1 bar2 bar4 bar6 seg4 seg5 seg6 seg7 seg8 seg9 seg10 bp4 rel 4f 4a 4b max 3f 3a bp3 batt 4e 4g 4c dp3 3e 3g bp2 bar7 bar9 4d bar12 bar14 bar16 3d bp1 bar8 bar10 bar11 bar13 bar15 bar17 bar18 seg11 seg12 seg13 seg14 seg15 seg16 seg17 bp4 3b min p max 2f 2a 2b p min bp3 3c zoom dp2 2e 2g 2c bp2 bar19 bar21 bar23 bar25 2d bar28 bar30 bp1 bar20 bar22 bar24 bar26 bar27 bar29 bar31 seg18 seg19 seg20 seg21 seg22 seg23 bp4 hold 1f 1a 1b khz bp3 dp1 1e 1g 1c mhz y bp2 bar32 bar34 1d bar37 bar39 x bp1 bar33 bar35 bar36 bar38 bar40 note: x: always on. y: if bargraph is under normal mode (except zoom mode), the position is on for (0, 10, 20, 30, 40). zoom: if bargraph is under zoom mode, the positionis on for (-20, -10, 0, 10, 20). " ": logic high. " ": logic low. " ": manual mode.
ES51961 3 3/4 manu dmm 2002/11/28 24 example for digits under bargraph: case1: case2: example for lcd panel: (2) backplane waveform (frequency = 78 hz)
ES51961 3 3/4 manu dmm 2002/11/28 25 (3) lcd display on condition lcd annunciator condition "batt" low battery is detected. " " logic high function " " logic low function "-" dc voltage and current function and logic unknown mode. "p max " maximum peak function is used. "p min " minimum peak function is used. "rel" rel function is used. "hold" hold function is used. "max" max function is used. "min" min function is used. " " continuity-check and diode-check are used. " " diode-check is used. " " frequency manual mode or completing a calibration on peak mode are used. "khz" frequency counter is used. "mhz" frequency counter is used. "apo" auto-power-off function is used. bargraph bargraph annunciator is only depend on input reading . " -20, -10, 0, 10, 20" zoom function is used. (4) ph1, ph2, ph3, ph4 four phase output 25.6ms 102.4ms ph1 ph2 ph3 ph4
ES51961 3 3/4 manu dmm 2002/11/28 26 (5) package 1 100 pin qfp package w l bc a d a b d 2 dimension paramenters milimeter mill symbol min. typ. max. min. typ. max. w 19.90 20.00 20.10 783.5 787.4 791.3 l 13.90 14.00 14.10 547.2 551.2 551.2 a 0.425 16.7 b 0.20 0.30 0.40 7.9 11.8 11.8 c 0.65 25.6 d 1.05 1.20 1.35 41.3 47.2 47.2 a 2.57 2.72 2.87 101.2 107.1 107.1 d 2.50 98.4 0 o 10 o

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