3 1/2 AUTO DMM
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
38
39
40
41
42
43
44
45
46
47
48
ES51981
Symbol
NC
V+
V+
NC
CL+
CL-
CIL
CAZL
BUFL
IVSH
IVSL
OVX
OVH
OVSG
NC
OR1
VR5
VR4
VR3
VR2
TEST 5
ACVL
ACVH
NC
ADI
NC
ADO
NC
VRH
VR
VA+
VA-
ADP
SGND
VR1
NC
VBAR
NC
NC
NC
NC
SLEEP
NC
NC
RS232
BKLIT
SEG15
NC
Type
P
P
IO
IO
O
O
O
I
I
I
I
I
O
O
O
O
O
I/O
O
O
I
O
O
I
I
Description
Positive supply voltage, output of on-chip DC-DC converter.
Positive supply voltage, output of on-chip DC-DC converter.
High resolution positive connection for reference capacitor.
High resolution negative connection for reference capacitor.
High resolution integrator output. Connected to integral capacitor
High resolution auto-zero capacitor connection.
Integral resistor connection for high resolution buffer output
High current measurement input.
Low current measurement input
Input high voltage for resistance measurement
Output connection for resistance measurement
Sense low voltage for resistance measurement
Reference resistor connection for 200.0Ω
range
Voltage measurement ÷10000 attenuator(2000V)
Voltage measurement ÷1000 attenuator(200.0V)
Voltage measurement ÷100 attenuator(20.00V)
Voltage measurement ÷10 attenuator(2.000V)
Test pin
Negative output of AC to DC converter
Positive output of AC to DC converter.
Negative input of internal AC to DC Opamp.
Output of internal AC to DC Opamp.
Output of band-gap voltage reference .Typically –1.2V
Reference input voltage connection. Typically –100mV
For ADP. Deintegrating voltage positive input. The input should
be higher than VA-.
For ADP. Deintegrating voltage negative input. The input should
be lower than VA+.
ADP input
Signal Ground
Measurement input
Decimal point control for temperature measurement in ADP mode.
I
G
I
I
O
I
I
O
Asserts low in the sleep mode. See page 8, function description
Pulse low to enable serial data output.
Back light function. Pulse low to set BKOUT pin output
LCD segment line 15
3
11/01/05
CYRUSTEK [ Cyrustek corporation ]
