Cyrustek ES51977 3 3/4 auto easy Datasheet

ES51977
3 3/4 AUTO EASY
Features:
•Full Automatic measurement
•3 3/4 digits display
•Frequency measurement (40M HZ)
•Rotary or push setting mode
•Auto-power-off then hold the final data
•Rotary or push re-power on function
•Data hold function
•Low battery detect (3V & 9V)
•On chip buzzer driver
•3V DC power supply
•Internal AC to DC conversion OP AMP
If non_AC mode , OP will become unit
gain buffer.
•Serial Data Output(RS232 format)
•LCD segment check
•100 Pin flat-package
Description:
The ES51977 is an integrated analogto-digital converter (ADC)with 3 3/4 digits
and 42-segment bargraph LCD display,
automatic range, and 3V battery power
supply.
Automatic range selection is provided
for voltage (AC/DC) measurement, ohm
measurement, current(uA and mA)
measurement, and frequency counter. The
ES51977 also provides serial data output
function.
Expensive and bulky mechanical range
switches are not required. The other
functions are provided for data holding,
low battery detection, auto-power-off,
diode measurement, continuity checking.
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
800mW
0℃ to 70℃
-25℃ to 125℃
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92年8月4日
ES51977
3 3/4 AUTO EASY
Electrical Characteristics
TA=25℃,V- = -3V
Symbol
Parameter
Test Condition
VPower Supply
Idd
Operating Supply Current
Normal Power On
Iss
Auto-power-off
REV
Rollover Error
(Voltage)
10M input
REB
Rollover Error
Resistor
(Bargraph)
NLV
Nonlinearity
Best Case
(Voltage)
Straight Line
NLB
Nonlinearity
(Bargraph)
Input Leakage
Low Battery Flag Voltage
V- to AGND
Zero Input Reading
10MΩInput Resistor
VREF Reference Voltage and 400Ω 100KΩ Between
measurement
VRH and AGND
Peak to Peak Backplane Drive -3.2≦V-≦-2.2
Voltage
Counter Time Base Period
fosc=4MHz
Open Circuit Voltage for Ω Ω and Continuity
Measurement(except 400Ω) Function
Pull High to 0V Resistance
FC1,FC2,FC3,FC4
FC5,RANGE,HOLD
Pull High to 0V Resistance
KEY, SET
AC Frequency Response
± 0.5﹪Error
(4V range)
± 2.5﹪Error
TCRF
Reference Voltage
Temperature Coefficient
100KΩBetween VRH
and AGND
0℃＜TA＜70℃
2
Min. Typ. Max. Count
-3.5 -3.0 -2.2 Volt
1.0 1.5
mA
0.1
5
uA
- ± 0.1 ﹪F.S.
-
-
± 0.5 ﹪F.S.
-
-
± 0.1 ﹪F.S.
-
-
± 0.5 ﹪F.S.
1
10
pA
-2.5 -2.3 -2.1
V
-000 000 +000 Count
-1.3 -1.2 -1.1
V
2.85
3.0
3.15
1
-0.5 -0.45 -0.4
V
Sec
V
-
2.5
-
MΩ
-
250
40 to
500
40 to
2000
-
KΩ
HZ
50
-
-
-
92年8月4日
ppm/℃
ES51977
3 3/4 AUTO EASY
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Symbol
V+
V+
CH+
CHCIH
BUFH
CAZH
CL+
CLCIL
CAZL
BUFL
IVSH
IVSL
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
NC
NC
NC
SGND
VR1
NC
VR
VRH
ACVR
NC
Description
Positive supply voltage,output of on-chip DC-DC converter.
Positive supply voltage,output of on-chip DC-DC converter.
High speed positive connection for reference capacitor.
High speed negative connection for reference capacitor.
High speed integrator output. Connected to integration capacitor.
Integration resistor connection for high speed buffer output.
High speed auto-zero capacitor connection
High resolution positive connection for reference capacitor.
High resolution negative connection for reference capacitor.
High resolution integrator output. Connected to integration capacitor.
High resolution auto-zero capacitor connection.
Integration resistor connection for high resolution buffer output.
High level current measurement input.
Low level current measurement input
Input high voltage for resistance measurement.
Output connection for resistance measurement.
Sense low voltage for resistance measurement.
Reference resistor connection for 399.9Ωrange.
Voltage measurement ÷ 10000 attenuator (3999V).
Voltage measurement ÷ 1000 attenuator (399.9V).
Voltage measurement ÷ 100 attenuator (39.99V).
Voltage measurement ÷ 10 attenuator (3.999V).
Test pin 5.
Negative output of AC to DC converter.
Positive output of AC to DC converter.
Negative input of internal AC to DC OP AMP.
Output of internal AC to DC OP AMP.
Signal ground.
Unknown voltage input .
Reference input voltage connection. Typically -100 mv.
Output of band-gap voltage reference. Typically -1.2 V.
Optional pin. When connected to -3V,ACV without 400mV range.
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92年8月4日
ES51977
3 3/4 AUTO EASY
Pin. No Symbol.
38 SLEEP
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
TEST1
NC
FREQ
SET
F100
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
ANNUNC
69
70
71
72
BP4
BP3
BP2
BP1
Description
When auto-power-off happen, this pin output will change from +3V
to –3V. When re-power on happens, this pin output will change back to
+3V.
Test pin 1.
Frequency counter input, offset to 1/2(V-).
Input to set serial data output. Pulse low to make this function active.
100 HZ square wave output.
LCD Segment line 24.
LCD Segment line 23.
LCD Segment line 22.
LCD Segment line 21
LCD Segment line 20.
LCD Segment line 19.
LCD Segment line 18.
LCD Segment line 17.
LCD Segment line 16.
LCD Segment line 15.
LCD Segment line 14.
LCD Segment line 13.
LCD Segment line 12.
LCD Segment line 11.
LCD Segment line 10.
LCD Segment line 9.
LCD Segment line 8.
LCD Segment line 7.
LCD Segment line 6.
LCD Segment line 5.
LCD Segment line 4.
LCD Segment line 3.
LCD Segment line 2.
LCD Segment line 1.
Square-wave output at the backplane frequency, synchronized to BP1.
ANNUNC can be used to control display annunciator. Connecting an
LCD segment to ANNUNC and turns it on; connecting an LCD
segment to its backplane and turns it off.
LCD Backplane 4.
LCD Backplane 3.
LCD Backplane 2.
LCD Backplane 1.
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92年8月4日
ES51977
3 3/4 AUTO EASY
Pin. No Symbol.
73 NC
74 BUZOUT
75
76
77
78
79
80
81
82
83
84
85
86
NC
NC
NC
NC
OSC1
OSC2
NC
KEY
NC
NC
HOLD
RANGE
87
88
89
90
91
92
FC5
FC4
FC3
FC2
FC1
LBAT9
93
94
95
96
97
98
99
100
SDO
C+
CVVDGND
AGND
AGND
Description.
Buzzer output. Audio frequency (2.0KHz) output which drives a
piezoelectric buzzer.
Crystal oscillator (input) connection.
Crystal oscillator (output) connection.
Mode change pin.
Input to hold display. Pulse low to make this function active.
Input to set automatic/manual mode and manual range selection. Pulse
low to make this function active.
Switch 5 for function selection.
Switch 4 for function selection.
Switch 3 for function selection.
Switch 2 for function selection.
Switch 1 for function selection.
Low battery voltage setting. If used 3V battery, connected this pin to
AGND, the default low battery voltage will be –2.3V. If used 9V
battery, when the input voltage is small than VRH(-1.2V), the low
battery annunciator will be display.
Serial data output.
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
Negative supply voltage.Connecting to battery negative terminal.
Negative supply voltage.Connecting to battery negative terminal.
Digital ground,connected to battery positive terminal.
Analog ground.
Analog ground.
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92年8月4日
ES51977
3 3/4 AUTO EASY
Pin Configuration
A
G
N
D
100
A
G
N
D
D
S
G
N V V C C D
D - - - + O
90
95
100
V+
V+
CH+
CHCIH
BUFH
CAZH
CL+
CLCIL
CZAL
BUFL
IVSH
IVSL
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
NC
NC
NC
R
L
A
B
A F F F F F N
T C C C C C G
9 1 2 3 4 5 E
H
O
K
L N N E N
D C C Y C
85
80
5
75
10
70
15
65
20
60
25
30
55
35
S V N VV A
G R C R R C
H V
N 1
R
D
40
50
45
N S T N F S F
C L E C R E 1
E T 0
E S
0
Q
E T
P 1
6
S
E
G
2
4
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
S
E
G
1
8
92年8月4日
OSC2
OSC1
NC
NC
NC
NC
BUZOUT
NC
BP1
BP2
BP3
BP4
ANNUNC
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
ES51977
3 3/4 AUTO EASY
Operation Mode
(1) Measurement Description
Voltage Measurement
Resistive divider is automatically changed to provide in range reading
for 399.9mV to 3999V full scale reading. The following table shows
the various full scale range.
Range
VR1
VR2
VR3
VR4
VR5
Full scale
399.9 mV
3.999 V
39.99 V
399.9 V
3999 V
Resistive Ratio
1
, 1/1
R2/(R1+R2) , 1/10
R3/(R1+R3) , 1/100
R4/(R1+R4) , 1/1000
R5/(R1+R5) , 1/10000
Resistance Measurement
Resistive divider is automatically changed to provide the proper range.
The following table shows the various full scale range.
Range
OR1
OR2
OR3
OR4
OR5
OR6
Full Scale
399.9 Ω
3.999 KΩ
39.99 KΩ
399.9 KΩ
3.999 MΩ
39.99 MΩ
Reference Resistor
R6(100Ω)
R5(1KΩ)
R4(10KΩ)
R1||R3(=100KΩ)
R1||R2(=1MΩ)
R1(10MΩ)
Current Measurement
In the current measurement mode , there are three range selections :
Mode
Automatic Mode 1
Range Selection Full Scale
uA
399.9 uA
3999 uA
Automatic Mode 2
mA
39.99 mA
399.9 mA
Manual Mode
A
39.99 A
When the mode changes among (uA, mA, A), the original AC/DC
state will keep.
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92年8月4日
ES51977
3 3/4 AUTO EASY
Continuity Check
The continuity check is the same as the 399.9Ω range of the resistance
measurement mode (manual mode). If the bargraph number <=3 ,there will
2.0 KHz signal comes out from BUZOUT pin, if the bargraph number >=4,
there will be no beep exist.
Diode Measurement
Use the DCV 3.999V range of voltage measurement mode (manual mode ).
If the test circuit is open or the device (diode) under test is larger than 2V,
the LCD display will show "OL",but the bargraph will show the real
detected voltage.
Frequency Counter
The timebase of ES51977 is derived by a clock oscillator.
The timebase of counter is :
Tcounter =
4,000,000
Fosc
Thus , the counter will operate with a 1 second timebase when a
4MHz oscillator is used. For accurate frequency measurement,a
crystal oscillator is recommended. The frequency counter can
automatically or manually select the proper range. Autorange
operation extends over five decades from 1 Hz to 39.99MHz.
Range
FR1
FR2
FR3
FR4
FR5
Full Scale
3.999 KHZ
39.99 KHZ
399.9 KHZ
3.999 MHZ
39.99 MHZ
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92年8月4日
ES51977
3 3/4 AUTO EASY
uA
mA
uA
450
10A
45
uA
100K IVSL 14
mA
100K IVSH 13
4.5
10A
0.495
0.005
mA
AGND
Z1
6V
Z2
V.A.R
R6
R5
R4
R3
R2
R1
D2
2.2u
100 OVH
16
OVSG
17
OR1
VR5
VR4
VR3
VR2
VR1
SGND
18
19
20
21
22
32
31
0.1u
15K
ES51977
ADO 27
66M
2.2u
15K
10K
15
100
1K
10K
101K
1.11M
10M
0.22u
D1
100K OVX
1.5K
PTC
R
100
AGND
10A
ADI
26
ACVH
25
ACVL
TEST5
24
23
INH
OVSG
INL
5K
Analog Switch Selection
Note : Light shielding for Z1, Z2, D1, D2.
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92年8月4日
ES51977
3 3/4 AUTO EASY
(2) Switch Description
Rotary mode : FC1,FC2,FC3,FC4,FC5
Measurement mode depends on the logic levels of FC1,FC2,FC3,FC4
FC5 and KEY :
When FC5=1
FC1 FC2 FC3 FC4 Mode
1
1
0
0 DC V
1
1
1
0 DC uA
1
1
0
1 DC mA
1
1
1
1 DC A
0
1
1
1 Ω
0
1
1
0 Continuity
1
0
1
1 Ω
1
0
1
0 Frequency
Push mode(KEY)
DC V — AC V
DC uA — AC uA
DC mA — AC mA
DC A — AC A
Ω— Continuity
Continuity — Diode
Ω— Continuity — Diode
When FC5=0, KEY is disabled.
FC1 FC2 FC3 FC4 Mode
1
1
0
0 ACV
1
1
1
0 AC uA
1
1
0
1 AC mA
1
1
1
1 ACA
0
1
1
1 Ω
0
1
1
0 Continuity
1
0
1
1 Diode
1
0
1
0 Frequency
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92年8月4日
ES51977
3 3/4 AUTO EASY
Push mode
RANGE
The mode selection of Auto-mode and Manual-mode is determined
by RANGE pin. The following is the operating flow chart of Auto-mode
and Manual-mode.
1 push < 1 sec
Automatic
Mode
Manual
Mode
1 push > 1 sec
Range up
1 push < 1 sec
* If HOLD function is enabled，when RANGE function is
pressed，the HOLD function will be clear.
* The bargraph is not affected by HOLD function.
Function
Voltage
(AC/DC)
Auto
R1－R5
Manual
Ri → Ri+1
(R5→R1)
A(AC/DC)
Ω
Fix
R1－R6
Fix
Ri → Ri+1
(R6→R1)
Continuity
Fix
Fix
Control Range
399.9mV
｜
3999V
399.9uA
｜
3999uA
39.99mA
｜
399.9mA
39.99A
399.9Ω
｜
39.99MΩ
399.9Ω
uA(AC/DC)
R1－R2
R1 → R2
R2 → R1
Diode
Fix
Fix
3.999V
Frequency
FR1－FR5
FRi→FRi+1
(FR5→FR1)
3.999KHZ
｜
39.99MHZ
mA(AC/DC)
R1－R2
R1 → R2
R2 → R1
11
Initial Range
399.9mV(DC)
3.999V (AC)
399.9uA
39.99mA
39.99A
"OL"
399.9Ω
"OL"
399.9Ω
"OL"
3.999V
3.999KHZ
92年8月4日
ES51977
3 3/4 AUTO EASY
HOLD :
1 push
RESET
(Automatic)
Data
Hold
(1) Under auto mode，press the HOLD function，the mode will change to
manual mode and stay at the same scale range.
(2) If continue to press the HOLD pin(logic low)then power on the
ES51977, all the segments will blight until release the HOLD pin.
Auto-Power-off function
Once power on the ES51977, the auto-power-off function will be enabled
and if the functions are not changed in 30 minutes, the auto-power-off condition
will happen and SLEEP pin output will change from +3V to –3V. When poweroff happens, the final data is saved.. If continue to press RANGE or SET or KEY pin
then power on the ES51977, the auto-power -off function will be disabled , and LCD
segment "APO" will be turned off.
(3) Buzzer
The BUZZER turns on in the following condition :
•1 beep : Measurement function changed ,power and re-power on ,
RANGE , HOLD, SET or KEY are pushed.
• 3.3 beeps : Input reading overrange. (except diode, ohm, continuity,
frequency function used)
• 2.0 KHZ continue: Continue check (Bargraph number<=3).
• 2.0 KHZ continue 1.5 sec : Auto-power-off.
BUZZER output waveform :
2.0 KHz ( continued )
0.5 mS
beeps (3.33 beeps/sec)
0.15 sec
0.3 sec
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92年8月4日
ES51977
3 3/4 AUTO EASY
(4) 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
D0 ~D6
0
LSB
p
P 1
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
corresopnd 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 begain the reading process.
all
package
p 1 0
0
range
p 1 0
digit3
digit2
p 1 0
0
digit1
p 1 0
p 1 0
option1
status
CR
p 1
option2
p 1 0
0
p 1
function
digit0
p 1 0
0
p 1
p 1
LF
Digit0 ~ 3 data is exactly the receiver display number,but the status, function,range,
option1,option2 data all need written program to judge what the data mean.
Note : LSB bit is sent first,then MSB bit.
The meter always output 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.
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92年8月4日
ES51977
3 3/4 AUTO EASY
RANGE :
Range
0110000
0110001
0110010
0110011
0110100
0110101
V
400mV
4V
40V
400V
4000V
mA
40mA
400mA
UA
400uA
4000uA
Ohm
400 Ohm
4K Ohm
40K Ohm
400K Ohm
4M Ohm
40M Ohm
Frequency
4K HZ
40K HZ
400K HZ
4M HZ
40M HZ
Because Continuity,Diode, and Curreet(A) measurement range
are all fixed,so they are all the first code 0110000.
DIGIT0 ~ 3 :
Digit
0110000
0110001
0110010
0110011
0110100
0110101
0110110
0110111
0111000
0111001
Display data
0
1
2
3
4
5
6
7
8
9
If the input value is over-range(OL),the reading data DIGIT3=4,DIGIT2=0,
DIGIT1=0,DIGIT0=0,but under the frequency mode,DIGIT0~3 output the
measured value.
FUNCTION : The definition code is not the same as FC1 ~ FC4.
Function
0111111
0111110
0111101
0111100
0110111
0110110
0111011
0111010
Measurement mode
A
uA
mA
Voltage
Ω
Continuity
Diode
Frequency
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92年8月4日
ES51977
3 3/4 AUTO EASY
STATUS :
0
BIT7
1
BIT6
1
BIT5
BIT4
BATT
BIT3
0
BIT2
OL
BIT1
－ : "1" is for the negative(-).
BATT : "1" is for the battery voltage is less than 2.3V±
OL : "1" is for the input voltage over-range.
0.2V.
OPTION1 :
0
BIT7
1
BIT6
1
BIT5
1
BIT6
1
BIT5
0
BIT4
0
BIT3
0
BIT2
0
BIT1
DC/AC AUTO MAN
BIT4
BIT3
BIT2
APO
BIT1
OPTION2 :
0
BIT7
DC/AC : "1" is for the DC mode and Ω, Diode, Continuity, ADP, Frequency
Function, "0" is for the AC mode.
AUTO : "1" is for auto range.
MAN : "1" is for the manual range.
APO : "1" is for the auto-power-off function enabled.
CR(BACK) : Transmission code "0001101".
LF(LINE FEED) : Transmission code "0001010".
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92年8月4日
ES51977
3 3/4 AUTO EASY
TEST CIRCUIT
1 Voltage
4 Current
AGND
OVSG
100
1K
10K
101K
1.11M
D1
D2
1.0u
1.0u
0.47u
VR2
88M
10A
ADI
ACVH
ACVL
TEST5
15K
10K
SGND
ADO
0.1u
15K
AGND
OR1
VR5
VR4
VR3
5K
0.005
10A
0.495
mA
mA
4.5
45
mA
V
R
1
uA
100K
uA
100K
450
uA
V
R
10M
-100mV
Voltage
5 Frequency
2 Resistor
F
R
E
Q
OVX
PTC
1.5K
200
2.2u
100
Z1
6V
OVH
OVSG
100
1K
10K
101K
1.11M
1.5K
PTC
OR1
VR5
VR4
VR3
VR2
VFin
SGND
AGND
3 Diode
6 Low battery
AGND
100
Z1
6V
OVH
9V
PTC
1.5K
10M
1.11M
ES51977
BA
TT
ER
Y
VR1
VR2
680K
LBAT9
0.1u
270K
AGND
V-
0V
OVSG
16
92年8月4日
IVSH
IVSL
ES51977
3 3/4 AUTO EASY
APPLICATION CIRCUIT
7.5V ZI
5.6V ZI
3V
0.1u
10u +
0.1u
+
-3V
0.1u
10u
AGND
0.01u
0.022u
200K
0.047u
10A
0.005
10A
0.495
mA
4.5
mA
10A
45
mA
uA
0.1u
0.22u
0.47u
200K
uA
100K
uA
100K
450
100K
100
1.5K
R
PTC
A
V+
G
V+
N
CH+ D
CHCIH
BUFH
CAZH
CL+
CLCIL
CZAL
BUFL
A
G
N
D
F F F F F R H K
C C C C C A O E
1 2 3 4 5 N L Y
G D
E
D V V C C
G - - - +
N
D
D1
D2
1.0u
1.0u
100
1K
10K
101K
1.11M
0.47u
0.1u
22K
22K
10K
5K
88M
OSC1
BUZOUT
-3V
BP1
BP2
IVSH
L
C
D
IVSL
OVX
D
I
S
P
L
A
Y
OVH
OVSG
Z1
6V
4 M HZ
OSC2
OR1
VR5
VR4
VR3
VR2
ADO
ADI
ACVH
ACVL
TEST5
S
G V
N R
D 1
V
V R
R H
10M
10k
91k
S
L
E
E
P
F
R
E
Q
S
E
T
S
E
G
2
4
S
E
G
2
3
200
2.2u
C1815
+ 1u
NPN
PTC
1.5K
-3V
Fin
-3V
Note: In order to prevent IC from damaging by inappropriate operation, the
Zener diodes MUST be required as protection.
17
92年8月4日
ES51977
3 3/4 AUTO EASY
The Other
(1) LCD pin assignment
BP1
BP2
BP3
BP4
BP1
BP2
BP3
BP4
BP1
BP2
BP3
BP4
BP1
BP2
BP3
BP4
SEG1 SEG2 SEG3 SEG4 SEG5
RS232 bar2
bar4
bar6
bar8
bar0
bar1
bar3
bar5
bar7
barAUTO MANU
e3
－
DC
BATT
f3
AC
AP0
SEG8
bar13
bar12
p3
SEG9 SEG10 SEG11
bar15 bar16 bar18
bar14
d2
bar17
e2
g2
c2
f2
a2
b2
SEG6
bar9
d3
g3
a3
SEG7
bar11
bar10
c3
b3
SEG12 SEG13 SEG14
bar20 bar22 bar24
bar19 bar21 bar23
px
p2
e1
HOLD
f1
SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21
bar25 bar27 bar29 bar31 bar32 bar34 bar36
d1
bar26 bar28 bar30
d0
bar33 bar35
g1
c1
p1
e0
g0
c0
M
a1
b1
f0
a0
b0
u
SEG22 SEG23 SEG24
bar38 bar40 HZ
bar37 bar39 Ω
K
V
A
m
NOTE :
1 : "bar0" is normally ON.
2 : "px" is always OFF(not used).
18
92年8月4日
ES51977
3 3/4 AUTO EASY
BATT APO
REL HOLD
MAX
MIN
RS232
DC AC
umVA
MKΩHZ
AUTO
MANU
LCD Display Panel
Backplane Waveform (Frequency = 62.5 HZ)
(V-)+3V
ANNUNC
V(V-)+3V
BP1
V(V-)+3V
BP2
V(V-)+3V
BP3
V(V-)+3V
BP4
V-
19
92年8月4日
ES51977
3 3/4 AUTO EASY
(2) LCD Display ON Condition
LCD Annunciator
"BATT"
"DC"
"AC"
"-"
"AUTO"
"MANU"
"HOLD"
" "＆"Ω"
" "＆"V"
"mV"
"umA"
"MKΩ"
"MKHZ"
"APO"
Bargraph
Low battery is detected.
DC voltage and DC current functions are
used.
AC voltage and AC current functions are
used.
DC voltage and current function.
Automatic mode is used.
Manual mode is used.
HOLD function is used.
Continuity-check is used.
Diode measurement is used.
AC/DC voltage function is used.
AC/DC current function is used.
Ω measurement function is used.
Frequency counter is used.
Auto-power-off function is used.
Bargraph annunciator is only depend on input
reading .
(3) .High Resolution and High Speed(Bargraph) time
Mode
ZI
AZ
INT
DEINT
High
Current(I)
Measurement
100m sec
150m sec
100m sec
200m sec
Resolution
High
Speed
Other Measurement Current(I) Other Measurement
(V,R)
Measurement
(V,R)
100m sec
10m sec
10m sec
150m sec
15m sec
15m sec
100m sec
10m sec
10m sec
400m sec
20m sec
40m sec
20
92年8月4日
ES51977
3 3/4 AUTO EASY
Package
1
100 Pin QFP Package
W
A
L
b
a
θ
B
2
D
C
d
Dimension Paramenters
Symbol
W
L
A
B
C
d
a
D
θ
Min.
Milimeter
Typ. Max.
Min.
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
21
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
92年8月4日