Datasheet ES51961 Datasheet (CYRTK)

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Page 1

ES51961

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 P

•Data hold, MAX/MIN hold,

Relative data function

(<10 us)

MIN

MAX

and

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.

•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

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.

•LCD segment check

•3V DC power supply

•100 Pin flat-package

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ES51961

3 3/4 MANU DMM

Absolute Maximum Ratings

Characteristics Ratings Supply Voltage (V- to AGND) -4V Analog Input Voltage V+ to VDigital Input V- to DGND Power Dissipation,Flat Package 500mW Operating Temperature

Storage Temperature

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 REV

REB

NLV

NLB

V12 Reference Voltage

V05 Reference Voltage

Operating Supply Current Normal Power On

Rollover Error (Voltage x 1 ) Rollover Error (Bargraph) Nonlinearity (Voltage x 1 ) Nonlinearity (Bargraph) Input Leakage - 1 10 pA Internal Low Battery Flag Voltage (for 3V battery) Zero Input Reading

LCD Drive Voltage, ANNUNC Counter Time Base Period fosc=4MHz - 1 - Sec Internal Pull High to 0V Current

0℃ to 70℃

-40℃ to 125℃

1.352.010mA

Auto-power-off

1M input Resistor

Best Case Straight Line

V- to AGND -2.5 -2.3 -2.1 V

1MΩ Input Resistor 100KΩ Between

V12 and AGND 100KΩ Between V05 and AGND

-3.5≦V-≦-2.2

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-)

-000 000 +000 count

-1.3 -1.2 -1.1 V

-0.57 -0.50 -0.43 V

2.9 3.2 3.5 V

1.2

± 0.1

± 0.5

± 0.1

± 0.5

﹪F.S.

-uA

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3 3/4 MANU DMM

Electrical Characteristics (cont.)

ES51961

TCRF Reference Voltage

Temperature Coefficient

Buzzer frequency Fosc = 4M HZ 2.5 KHZ LCD drive frequency 78 HZ

VLL Logic low reference

voltage VLH1 VLH2 VLH3

Logic high reference

voltage

Maximum and minimum

peak value accuracy

(10 uS)

100KΩ Between V12 and AGND

0℃＜TA＜70℃

Logic test DC 0.8 V

Logic test DC 4.0

使用 10nF 聚㆚酯薄膜電容(polyester, Mylar)

- 50 -

2.4

1.5 ±2% ±10

ppm/

℃

V V V

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 connection for reference capacitor. 8 CH- I/O High speed negative connection for reference capacitor. 9 CIH O High speed integrator output. Connected to integration capacitor.

10 BUFHD10 O

11 BUFH O 12 BUFHM10 O

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 connection 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

19 BUFL O

20 BUFLM10 O

Integration resistor (1 MΩ) connection for high speed buffer ÷ 10 output. Integration resistor (100 kΩ) connection for high speed buffer output.

Integration resistor (10 kΩ) connection for high speed buffer ×10 output.

Integration resistor (1 MΩ) connection for high resolution buffer ÷ 10 output. Integration resistor (100 kΩ) connection for high resolution buffer output. Integration resistor (10 kΩ) connection for high resolution buffer ×10 output.

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ES51961

3 3/4 MANU DMM

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 reference 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

28 P

MIN

29 OP+ I OP + terminal input. 30 OP- I OP – terminal input.

OPO O OP output. If this OP is not used, let OPO saturate to V+ can save

32 OR O 33 PKIN I PEAK HOLD ( v.s. AGND ) or Logic Probe ( v.s. V- ) input pin . 34 BKLIT I Back light control pin. Pulse low to make this function active. 35 SLEEP O

36 INT O Integration cycle output (100 ms). 37 RANGE I Semiauto/manual mode and manual range selecting. Pulse low to make

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 backplane frequency, synchronized to BP1.

SEG23

SEG01 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 frequency (2.5 KHz) output which drives a

I/O Maximum peak hold output. I/O Minimum peak hold output.

power. For example, let OP+=0V and OP-=-3V.

Overrange output. It could be controlled by RANGE pin.

When auto-power-off happen, this pin output will change from V+ to

V-. If re-power-on happen, the output will change from V- to V+.

this function active.

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.

OOLCD Segment line 23.

| LCD Segment line 01.

piezoelectric buzzer.

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ES51961

3 3/4 MANU DMM

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 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 C- O 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 V- P Negative supply voltage. Connecting to battery negative terminal. 99 V- P 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

L D G N D

ES51961

3 3/4 MANU DMM

M A

R E

AGND

V+ V+

ZL CH+ CH-

BUFHD10

BUFHM10

CIH

BUFH

CAZH

CL+ CL-

CIL

CAZL

CZAL

BUFLD10

BUFL

BUFLM10

V05 V12

REFLO

REFHI

VIN+

VIN-

MAX

MIN

OP+

OP-

100

40 45

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

T G E

N C

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ES51961

3 3/4 MANU DMM

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 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 High Speed

INT 100m sec 10m sec

DINT 400m sec 40m sec

Voltage+M2:

Mode High Resolution High Speed

INT 100m sec 10m sec

DINT 200m sec 20m sec

100m sec 150m sec

20m sec

5m sec

20m sec

5m sec

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3 3/4 MANU DMM

Voltage+PEAK:

Mode High Resolution High Speed

INT 100m sec 10m sec

DINT 500m sec 50m sec

Voltage+PEAK+M2:

Mode High Resolution High Speed

INT 100m sec 10m sec

DINT 250m sec 25m sec

The relation between the scale range and Bar meaning

100m sec 150m sec

20m sec

5m sec

20m sec

5m sec

ES51961

Scale Enabled pin Input full range Normal mode

Bar meaning

Default or

×1

M10 & D10 M10 40mV 1mV 1mV

×10

M2 200mV 5mV 0.5mV

×2

M10 &M2 20mV 0.5mV 0.5mV

×20

D10 2000mV 100mV 10mV

÷ 10

D10 & M2 2000mV 50mV 5mV

÷ 5

* 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.

400mV 10mV 1mV

Zoom mode

Bar meaning

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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ES51961

3 3/4 MANU DMM

present LOGIC state

LOGIC high level setting

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:

buzzer on level

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

3 3/4 MANU DMM

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

300 ms

0.1 us

<2> Pulse high input

300 mS

600 ms 600 ms

<3> Period input

Hi Lo

300 ms 300 ms

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0.1 us

ES51961

3 3/4 MANU DMM

<4> Period input(10M)

<5> Unknow

Frequency Counter

Hi Lo

VH(4.0,2.4,1.5V)

VL(0.8V)

input

0.5~1 ms

300 ms

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 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 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

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ES51961

3 3/4 MANU DMM

Continuity

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 active mode

(1)HOLD X X X (2)PEAK O X X (3)MAX/MIN O X X (4)REL O X X

HOLD PEAK MAX/MIN REL

*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: 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.

1 push

Data Hold

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(2) REL+HOLD:

ES51961

3 3/4 MANU DMM

RESET

(Semiauto)

"REL" & "H" active holded relative value

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

"REL" active the relative value

1 push < 1 sec

1 push >1 sec

1 push<1 sec

RESET

(Semiauto)

"REL" blink the Di(N) value

push HOLDpush HOLD

"REL" blink & "H" active the Di(N) value

"MAX" active max. value

push HOLD push HOLD

"MAX" & "H" active holded max.

1 push > 1 sec

1 push < 1sec

"MIN" active min. value

"MIN" & "H" active holded min.

1 push < 1sec

"MAX" & " MIN" blink current value

push HOLD

"MAX" & "MIN" & "H" blink current value

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(4) PEAK:

CALIBRATION

1 push > 2 sec

RESE T (Semiauto)

1 push < 1 sec 1 push > 1 sec

end(*4)

(*1)

ES51961

3 3/4 MANU DMM

end(*5)

(MANU)

1 push > 2 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:

RANGE pin. The following are the operation flow chart of them.

"PMA X" active max. peak value

1 push <1 sec

"PMIN" active min. peak value

(*1): push RANGE > 1 sec

The ranges of voltage, frequency and logic modes is selected by

Voltage mode:

RESET (Semiauto)

Frequence mode:

RESET (Automatic)

Logic mode:

default (4.0V)

1 push < 1 sec

MANU

1 push > 1 sec

1 push < 1 sec

MANU

1 push > 1 sec

1 push can change the logic high reference voltage between 4.0,

2.4 and 1.5V.

1 push < 1 sec (change OR's state)

1 push < 1 sec (change measuring range)

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ES51961

3 3/4 MANU DMM

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”.

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) ORÎ"H", if high resolution ≥2000 counts

(ii) OR keeps its original state, if 380≤ high resolution <2000

counts

(iii) ORÎ"L", if high resolution <380 counts

(5) except situation (1)~(4), under semiauto mode the state of OR is:

(i) ORÎ"H", if high resolution ≥4000 counts

(ii) OR keeps its original state, if 380≤ high resolution <4000

counts

(iii) ORÎ"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

3 3/4 MANU DMM

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

ZOOM

(1) Voltage mode

function is pushed, the bargraph display will change to ZOOM mode.

(2) Logic mode

unknown Logic (the default is High beep).

BKLIT

When this pin BKLIT is pushed, the BKOUT pin output will change from

complete, the meter will back to the original mode (manual or

semiauto) before these functions happen.

The default status of the bargraph display is from left to right. Once this

This pin is used to turn on the buzzer whether is under High, Low or

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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ES51961

3 3/4 MANU DMM

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-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 P

power-on the ES51961 with rotary mode, the storage value will be clear.

MAX

, P

, or relative and reference value will be keeped. But if re-

MIN

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

3 3/4 MANU DMM

beeps (3.33 beeps/sec)

0.4 mS

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

-3V

D0 ~D6

LSB 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

yDig

ES51961

3 3/4 MANU DMM

range

function2

digit0digit1

status1

digit2digit3

function1

sataus2

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 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:

Digit Displa

it Displa 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, DIGIT0=0, but under the frequency mode, DIGIT0~

DIGIT3 output the measured value.

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(3) FUNCTION:

FUNCTION1:

ES51961

3 3/4 MANU DMM

BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 －: "1" is for the negative (-).

FUNCTION2:

BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1

MANU: "1" is on " " mode, and "0" is on "AUTO" .

(4) STATUS:

STATUS1:

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:

011

0 1 1 MANU M2 M10 D10

011P

0 1 1 P2 P1 APO OR

－

MAX

FC1 FC2 FC3

MIN

BATT OL

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”.

2002/11/28

Page 21

7. Test Circuit

ES51961

3 3/4 MANU DMM

(1) DC test

DC IN

(3) AC test

-100 mV

0.1u

REFLO

REFHI

VIN+

VIN-

REFLO

REFHI

VIN+

VIN-

O P +

(2) FREQ input test

F R E Q

200

2.2u

C1815 NPN

-3V

PTC

1.5K

FREQ IN

(4) Peak function test

PTC 2.2k

400 mV INPUT

0.1u

470

PKIN

VIN+

(5) LOGIC test

PTC 2.2k LOGIC HIGH (RED)

LOGIC LOW (BLACK)

10K

22K

AC IN

0.1u

22K

88M

1.0u

470

1.0u

0.47u

PKI

V-

AC/DC rectifier

Under voltage mode, if Peak function is enabled, PKIN input will be enable

(6) Low battery test(9V)

680K

270K

BATTERY

Note: Light shielding for diode.

ES51961

LBAT9

0.1u AGND

V-

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Page 22

8. Application Circuit

ES51961

3 3/4 MANU DMM

CAZL

2002/11/2822

Page 23

9. The Other

(1) LCD pin assignment

BP1 BP2 BP3 BP4 SEG1 SEG2 SEG3 BP4 APO BP3 Bar0 BarBP2 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

ES51961

3 3/4 MANU DMM





SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 BP4 3B MIN P 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.

MAX

2F 2A 2B P

MIN

2002/11/2823

Page 24

Example for digits under bargraph:

Case1:

Case2:

Example for LCD panel:

ES51961

3 3/4 MANU DMM

(2) Backplane Waveform (Frequency = 78 Hz)

2002/11/2824

Page 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.

" Maximum peak function is used.

MAX

" Minimum peak function is used.

MIN

"REL" REL function is used.

"HOLD" HOLD function is used.

"MAX" MAX function is used.

"MIN" MIN function is 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.

Continuity-check and Diode-check are used. Diode-check is used.

Frequency manual mode or completing a calibration on PEAK mode are used.

ES51961

3 3/4 MANU DMM

(4) PH1, PH2, PH3, PH4 four phase output

PH1

PH2

PH3

PH4

25.6ms

102.4ms

2002/11/2825

Page 26

(5)

Package

1 100 Pin QFP Package

ES51961

3 3/4 MANU DMM

2 Dimension Paramenters

Symbol

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

Milimeter Mill

Min. Typ. Max. Min. Typ. Max.

2002/11/2826