Text preview for : Datasheet_ES51961.pdf part of TES Extech TES-1335 Extech EA30 TES-1335 Digital Illuminance Meter Instruction Manual. Also known as Extech EA30 Light Meter User's Guide. Service Manual and Calibration.
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3 3/4 MANU DMM
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 PMAX and PMIN (<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
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ES51961
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.
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Absolute Maximum Ratings
Characteristics Supply Voltage (V- to AGND) Analog Input Voltage Digital Input Power Dissipation,Flat Package Operating Temperature Storage Temperature Ratings -4V V+ to VV- to DGND 500mW 0 to 70 -40 to 125
ES51961
Electrical Characteristics
TA=25, V- = -3V
Symbol Parameter VPower Supply Idd Operating Supply Current Iss REV Rollover Error (Voltage x 1 ) REB Rollover Error (Bargraph) NLV Nonlinearity (Voltage x 1 ) NLB Nonlinearity (Bargraph) Input Leakage Internal Low Battery Flag Voltage (for 3V battery) Zero Input Reading V12 Reference Voltage V05 Reference Voltage
Test Condition Normal Power On Auto-power-off 1M input Resistor
Min. -3.5 -
Typ. Max. unit -3.0 -2.2 V 1.3 2.0 mA 5 10 uA ± 0.1 F.S. 1 -2.3 000 -1.2 ± 0.5 F.S. ± 0.1 F.S. ± 0.5 F.S. 10 -2.1 pA V
Best Case Straight Line V- to AGND 1M Input Resistor 100K Between V12 and AGND 100K Between V05 and AGND -3.5V--2.2
-2.5 -000 -1.3
+000 count -1.1 V V V Sec uA
-0.57 -0.50 -0.43 3.2 1
1.2
LCD Drive Voltage, 2.9 ANNUNC Counter Time Base Period fosc=4MHz Internal Pull High to 0V BKLIT,RANGE,SET, Current DP1,DP2,BDIS, BUZIN,XTAL,RESET, FC1,FC2,FC3,M2, M10,D10,ZOOM, PEAK,REL,MAX/MIN HOLD (which is connected to V-)
2
3.5 -
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Electrical Characteristics (cont.)
TCRF Reference Voltage Temperature Coefficient Buzzer frequency LCD drive frequency Logic low reference voltage Logic high reference voltage 100K Between V12 and AGND 0TA70 Fosc = 4M HZ Logic test DC Logic test DC 50
ES51961
- ppm/ KHZ HZ V V V V F.S. count
VLL VLH1 VLH2 VLH3
2.5 78 0.8 4.0 2.4 1.5 ±2% ±10
Maximum and minimum 10nF peak value accuracy (polyester, Mylar) (10 uS)
Pin Description
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol Type Description AGND G Analog ground. AGND G Analog ground. V+ P Positive supply voltage, output of on-chip DC-DC converter. V+ P Positive supply voltage, output of on-chip DC-DC converter. ZH O Output to RC filter for ZOOM mode ZL I Input from RC filter for ZOOM mode CH+ I/O High speed positive connection for reference capacitor. CHI/O High speed negative connection for reference capacitor. CIH O High speed integrator output. Connected to integration capacitor. BUFHD10 O Integration resistor (1 M) connection for high speed buffer ÷ 10 output. BUFH O Integration resistor (100 k) connection for high speed buffer output. BUFHM10 O Integration resistor (10 k) connection for high speed buffer ×10 output. CAZH O High speed auto-zero capacitor connection CL+ I/O High resolution positive connection for reference capacitor. CLI/O High resolution negative connection for reference capacitor. CIL O High resolution integrator output. Connected to integration capacitor. CAZL O High resolution auto-zero capacitor connection. BUFLD10 O Integration resistor (1 M) connection for high resolution buffer ÷ 10 output. BUFL O Integration resistor (100 k) connection for high resolution buffer output. BUFLM10 O Integration resistor (10 k) connection for high resolution buffer ×10 output.
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Pin 21 22 23 24 25 26 27 28 29 30 32 33 34 35 Symbol V05 V12 REFLO REFHI VIN+ VINPMAX PMIN OP+ OP31 OPO OR PKIN BKLIT SLEEP Type O O I I I I I/O I/O I I O O I I O O I I I I I I I O
ES51961
Description Reference voltage output -0.5V to AGND for resistor measurement. Reference voltage output -1.2V to AGND. Low differential reference input connection High differential reference input connection High analog input signal connection. Low analog input signal connection. Maximum peak hold output. Minimum peak hold output. OP + terminal input. OP terminal input. OP output. If this OP is not used, let OPO saturate to V+ can save power. For example, let OP+=0V and OP-=-3V.
Overrange output. It could be controlled by RANGE pin.
PEAK HOLD ( v.s. AGND ) or Logic Probe ( v.s. V- ) input pin . Back light control pin. Pulse low to make this function active.
When auto-power-off happen, this pin output will change from V+ to
36 INT 37 RANGE 38 39 40 41 42 43 44 SET MP DP1 DP2 FREQ BDIS ANNUNC
45 | 67 68 69 70 71 72 73 74 75 76
SEG23 | SEG01 BP1 BP2 BP3 BP4 PH1 PH2 PH3 PH4 BUZOUT
O O O O O O O O O O O
V-. If re-power-on happen, the output will change from V- to V+. Integration cycle output (100 ms). Semiauto/manual mode and manual range selecting. Pulse low to make this function active. Input to set serial data output. Pulse low to make this function active. Ranges setting for MAX/MIN or PEAK mode. Decimal point control for voltage measurements. Decimal point control for voltage measurements. Frequency counter input, biased to 1/2 V- by IC internal circuit. When connected to V-, bargraph will be disabled (voltage mode). Square-wave output at the backplane 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. LCD Segment line 23. | LCD Segment line 01. LCD Backplane 1. LCD Backplane 2. LCD Backplane 3. LCD Backplane 4. Phase1 output, for capacitor measurement. Phase2 output, for capacitor measurement. Phase3 output, for capacitor measurement. Phase4 output, for capacitor measurement. Buzzer output. Audio frequency (2.5 KHz) output which drives a piezoelectric buzzer.
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Pin Symbol 77 BUZIN
ES51961
Type Description 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 Logic 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 CO Negative capacitor connection for on-chip DC-DC converter. 97 LBAT9 I Low battery voltage setting. If used 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 smaller than V12 (-1.2V), the LCD annunciator "BATT" will be displayed. 98 VP Negative supply voltage. Connecting to battery negative terminal. 99 VP Negative supply voltage. Connecting to battery negative terminal. 100 DGND G Digital ground, connected to battery positive terminal.
*Type: I=Input, O=Output, P=Power, G=Ground
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Pin Configuration
B L K H B D S O O A G N V VT C C D U L D - - 9 - + O T D 100 AGND AGND V+ V+ ZH ZL CH+ CHCIH BUFHD10 BUFH BUFHM10 CAZH CL+ CLCIL CAZL CZAL BUFLD10 BUFL BUFLM10 V05 V12 REFLO REFHI VIN+ VINP P OP+ OPMAX MIN
ES51961
M A R X P Z E / F F F S MR E O D M I E AO 1 1 MC C C E N L KM 0 0 2 3 2 1 T 90 85 80 XTAL OSC1 OSC2 BUZIN BUZOUT PH4 PH3 PH2 PH1 BP4 BP3 BP2 BP1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17
95
5 75
10 70
15 65
20
60
25
55
30 OO P B P R K K I L O N I T
35 S I L N E T E P
40 R S M DD A E P P P N T 1 2 G E F R E Q B D I S A N N U N C
45 S E G 2 3 S E G 2 2 S E G 2 1 S E G 2 0 S E G 1 9
50 S E G 1 8
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Operation Mode
Switch Description
Measurement mode are depend on the logic levels of FC1, FC2, FC3.
ES51961
FC1 FC2 FC3 Mode Overflow Beep PEAK ZOOM BDIS 1 1 1 Volt1 (*1) O O O O 1 1 0 Volt2 O X O O 1 0 1 Volt3 X O O O 1 0 0 Volt4 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 0 0 1 Diode 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 sign annunciator "-" will not display. *3: The range can be changed by RANGE pin. *4: The logic high level reference voltage 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 ZI 100m sec AZ 150m sec INT 100m sec DINT 400m sec Voltage+M2: Mode High Resolution ZI 100m sec AZ 150m sec INT 100m sec DINT 200m sec High Speed 20m sec 5m sec 10m sec 40m sec
High Speed 20m sec 5m sec 10m sec 20m sec
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Voltage+PEAK: Mode ZI AZ INT DINT High Resolution 100m sec 150m sec 100m sec 500m sec High Speed 20m sec 5m sec 10m sec 50m sec
ES51961
Voltage+PEAK+M2: Mode ZI AZ INT DINT High Resolution 100m sec 150m sec 100m sec 250m sec High Speed 20m sec 5m sec 10m sec 25m sec
The relation between the scale range and Bar meaning Scale Enabled pin Input full range Normal mode Bar meaning 400mV 10mV ×1 Default or M10 & D10 40mV 1mV ×10 M10 M2 200mV 5mV ×2 20mV 0.5mV ×20 M10 &M2 2000mV 100mV ÷ 10 D10 2000mV 50mV ÷ 5 D10 & M2 Zoom mode Bar meaning 1mV 1mV 0.5mV 0.5mV 10mV 5mV
* If M2, M10, D10 is changed under 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 independent LOGIC high level, 4.0V, 2.4V and 1.5V (changed by RANGE pin), and buzzer on "H", "-" and "L" level (changed by ZOOM pin) can be selected individually. The Logic low level is always 0.8V and the response frequency is 20MHz.
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present LOGIC state LOGIC high level setting buzzer on level
ES51961
The default LOGIC mode panel
LOGIC probe input high should connect 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 level change to high (>2.4V), the buzzer will turn on.
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ES51961
The above panel means now is logic 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 logic 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
0.1 us <1> Pulse low input Hi Lo
300 ms 0.1 us <2> Pulse high input 300 mS 600 ms <3> Period input 600 ms Hi Lo
Hi Lo
300 ms
300 ms
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0.1 us <4> Period input(10M) Hi Lo
ES51961
<5> Unknow input 0.5~1 ms
VH(4.0,2.4,1.5V) VL(0.8V)
300 ms 300 ms
Frequency Counter
The timebase of ES51961 is derived by a crystal or internal RC clock oscillator. The timebase of counter is : Tcount = 4,000,000 Fosc
Thus, the counter will operate with a 1 second timebase when a 4MHz crystal oscillator is used. For accurate frequency measurement, a crystal 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 FR1 FR2 FR3 FR4 FR5 FR6 Full Scale 3.999 KHZ 39.99 KHZ 399.9 KHZ 3.999 MHZ 39.99 MHZ 399.9 MHZ
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Continuity
ES51961
If the input voltage (VIN+~VIN-) 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, MAX/MIN, REL, PEAK function. enable mode HOLD PEAK MAX/MIN REL active mode (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, then 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, then 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)
1 push
Data Hold
*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, REL, PEAK, ZOOM except BKLIT), auto-power-off function and counter will be reset.
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(2) REL+HOLD:
RESET (Semiauto) 1 push <1 sec "REL" active the relative value push HOLD "REL" & "H" active holded relative value 1 push<1 sec 1 push >1 sec "REL" blink the Di(N) value push HOLD "REL" blink & "H" active the Di(N) value
ES51961
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) (± 4000), the relative value will display "OL". (3) MAX/MIN+HOLD:
1 push < 1 sec RESET (Semiauto)
1 push > 1 sec
1 push < 1sec
"MAX" active max. value
push HOLD
"MIN" active min. value
push HOLD
"MAX" & " MIN" blink current value
push HOLD
"MAX" & "H" active holded max.
"MIN" & "H" active holded min. 1 push < 1sec
"MAX" & "MIN" & "H" blink current value
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(4) PEAK:
CA LIBR A TIO N 1 pu sh > 2 sec en d (* 4 ) en d(* 5) RES E T (*1 ) (M A N U ) (S em iau to ) 1 p ush < 1 sec 1 push > 1 sec
ES51961
1 p ush > 2 sec
"PM A X " active " PM IN " activ e m ax . p eak value m in. p eak v alu e 1 p u sh < 1 sec (* 1): p ush R A N G E > 1 sec
*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 operation flow chart of them. Voltage mode:
RESET (Semiauto) 1 push < 1 sec 1 push > 1 sec MANU 1 push < 1 sec (change OR's state)
Frequence mode:
RESET (Automatic) 1 push < 1 sec 1 push > 1 sec MANU 1 push < 1 sec (change measuring range)
Logic mode:
default (4.0V)
1 push can change the logic high reference voltage between 4.0, 2.4 and 1.5V.
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MP
ES51961
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 PEAK, 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 pin 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".
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ES51961
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 M2, 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 changed again , it can be changed by RANGE pin. (2) MP="L": If the states of M2, M10 or D10 are changed by OR's state, the MAX/MIN or PEAK function 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 end, 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 display 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 the buzzer whether is under High, Low or unknown Logic (the default is High beep).
BKLIT
When this pin BKLIT is pushed, the 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
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Decimal point select (Under voltage mode)
DP2 DP1 Decimal point H H None H L Point1 L H Point2 L L Point3
ES51961
Auto-Power-Off function
Once power on the ES51961, the auto-power-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 (except HOLD pin) then power on the ES51961, the auto-power-off function will 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 PMAX , PMIN , or relative and reference value will be keeped. But if repower-on the ES51961 with rotary mode, the storage value will be clear.
SLEEP
When auto-power-off happens, this pin output will change from V+ to V-, once re-power on happen, this pin output 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
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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)
ES51961
0.4 mS
beeps (3.33 beeps/sec)
0.15 sec
0.3 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
0V -3V
0
LSB
D0 ~D6
p 1 P
MSB
A single package include a start bit (0), D0~D6 (7 bit), a parity check bit (odd) and a stop bit (1). All the data stream is consist of 110× 2 bits. The high and low voltage levels correspond 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.
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All package
0 range
0 p 1 0 p 1 0 p 1
ES51961
digit3 p 1 0 p 1 0 digit0
p 1 0 p 1 0
digit2 p 1 function1
p 1
digit1 0 function2
status1
sataus2
0 CR
p 1 0 LF
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 input value to the serial 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 0110100 4 KHz 0110110 40 KHz 0110010 400 KHz Range Frequency 0110000 4 MHz 0110001 40 MHz 0110011 400 MHz
Under the other mode (Logic, Voltage), the output is 0110100 (2) DIGIT0~3: Digit Display 0110000 0 0110001 1 0110010 2 0110011 3 0110100 4 Digit Display 0110101 5 0110110 6 0110111 7 0111000 8 0111001 9
If the input value is overrange (OL), the reading data DIGIT3=4, DIGIT2=0, DIGIT1=0, DIGIT0=0, but under the frequency mode, DIGIT0~ DIGIT3 output the measured value.
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(3) FUNCTION: FUNCTION1: 0 1 1 FC1 BIT3 FC2 BIT2 FC3 BIT1 BIT7 BIT6 BIT5 BIT4 : "1" is for the negative (-). FUNCTION2: 0 BIT7 1 BIT6 1 MANU M2 BIT5 BIT4 BIT3 M10 BIT2 D10 BIT1
ES51961
MANU: "1" is on " " mode, and "0" is on "AUTO" . (4) STATUS: STATUS1: 0 BIT7 1 BIT6 1 BIT5 PMAX BIT4 PMIN BIT3 BATT BIT2 OL 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 0 0 1 1 P1 0 1 0 1 Decimal point None Point1 Point2 Point3
(5) CR (BACK): Transmission code "0001101". (6) LF (LINE FEED): Transmission code "0001010".
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7. Test Circuit
(1) DC test (2) FREQ input test
F R E Q -100 mV + DC IN 1M 0.1u REFLO REFHI VIN+ VINC1815 NPN 200 2.2u PTC 1.5K FREQ IN
ES51961
-3V
(3) AC test
-100 mV REFLO REFHI VIN+ VINO O P P + AC IN 88M 0.1u 1.0u D2 1.0u 5K 10K 22K D1 0.47u O P O
(4) Peak function test
PTC 2.2k 470 PKIN
DC 400 mV INPUT 0V AC
1M 0.1u
VIN+
AC/DC rectifier
Under voltage mode, if Peak function is enabled, PKIN input will be enabled
22K
(5) LOGIC test
PTC 2.2k LOGIC HIGH (RED) LOGIC LOW (BLACK) 470 PKIN
(6) Low battery test(9V)
9V
ES51961
BATTERY
680K LBAT9 0.1u 270K AGND V-
V0V
Note: Light shielding for diode.
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3 3/4 MANU DMM
8. Application Circuit
ES51961
CAZL
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3 3/4 MANU DMM
9. The Other
(1) LCD pin assignment
BP1 BP4 BP3 BP2 BP1 SEG4 REL BATT Bar7 Bar8 SEG11 3B 3C Bar19 Bar20 SEG5 4F 4E Bar9 Bar10 SEG6 4A 4G 4D Bar11 SEG7 4B 4C Bar12 Bar13 BP2 BP3 BP4 SEG1 APO Bar0 Bar1 Bar2 SEG8 MAX DP3 Bar14 Bar15 SEG2 BarBar3 Bar4 SEG3 Bar5 Bar6
ES51961
BP4 BP3 BP2 BP1
SEG9 SEG10 3F 3A 3E 3G Bar16 3D Bar17 Bar18
BP4 BP3 BP2 BP1
SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 MIN PMAX 2F 2A 2B PMIN ZOOM DP2 2E 2G 2C Bar21 Bar23 Bar25 2D Bar28 Bar30 Bar22 Bar24 Bar26 Bar27 Bar29 Bar31
BP4 BP3 BP2 BP1
SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 HOLD 1F 1A 1B KHZ DP1 1E 1G 1C MHZ Y Bar32 Bar34 1D Bar37 Bar39 X 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.
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3 3/4 MANU DMM
Example for digits under bargraph: Case1:
ES51961
Case2:
Example for LCD panel:
(2) Backplane Waveform (Frequency = 78 Hz)
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3 3/4 MANU DMM
(3) LCD Display ON Condition
LCD Annunciator "BATT" " " " " "-" "PMAX" "PMIN" "REL" "HOLD" "MAX" "MIN" " " " " " " Condition
ES51961
Low battery is detected. Logic high function Logic low function DC voltage and current function and Logic unknown mode. Maximum peak function is used. Minimum peak function is used. REL function is used. HOLD function is used. MAX function is used. 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
PH1
25.6ms
PH2
PH3
PH4
102.4ms
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(5) Package
ES51961
1
100 Pin QFP Package
W A
L
b
a
B C D
d
2
Dimension Paramenters
Symbol W L A B C d a D
Min.
Milimeter Typ. Max.
Min.
Mill Typ. 787.4 551.2 16.7 11.8 25.6 47.2 107.1 98.4
Max. 791.3 551.2 11.8 47.2 107.1
19.90 20.00 20.10 783.5 13.90 14.00 14.10 547.2 0.425 0.20 0.30 0.40 7.9 0.65 1.05 1.20 1.35 41.3 2.57 2.72 2.87 101.2 2.50 o 0 10o
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