ES51970(6000counts)
DMM Analog front end with Inrush
Pin Description
Pin No
Symbol
BUFH
CAZH
NC
Type
Description
1
2
3
O
O
-
High-speed buffer output pin. Connect to integral resistor.
High-speed auto-zero capacitor connection.
Not connected
4
5
CL+
CL-
IO Positive connection for reference capacitor of high-resolution A/D.
IO Negative connection for reference capacitor of high- resolution A/D.
6
7
8
9
10
11
12
13
14
CIL
O
O
O
O
O
O
O
O
I
High-resolution integrator output. Connect to integral capacitor.
High-resolution auto-zero capacitor connection.
High-resolution Buffer output pin. Connect to integral resistor
Buffer output pin in AZ and ZI phase.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Output of band-gap voltage reference. Typically –1.23V
De-integrating voltage positive input. The input should be higher than
VA-.
CAZL
BUFL
RAZ
OHMC3
OHMC2
OHMC1
VRH
VA+
15
VA-
I
De-integrating voltage negative input. The input should be lower than
VA+.
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
EXTSRC
NC
NC
OR1
VR5
VR4
VR3
VR2
OVSG
VR1
OVX
OVH
OVH1
NC
NC
NC
NC
NC
I
-
-
O
O
O
O
O
O
I
External source input available for Res/Diode/ADP mode
Not connected
Not connected
Reference resistor connection for 600.0Ω range
Voltage measurement ÷10000 attenuator(1000V)
Voltage measurement ÷1000 attenuator(600.0V)
Voltage measurement ÷100 attenuator(60.00V)
Voltage measurement ÷10 attenuator(6.000V)
Sense low voltage for resistance/voltage measurement
Measurement Input. Connect to a precise 10MΩ resistor.
Sense input for resistance/capacitance measurement
Output connection for resistance measurement
Output connection1 for resistance measurement (optional)
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
Not connected
Signal Ground.
Current measurement input for 6000μA, 600mA and 60A modes.
Current measurement input for 600μA, 60mA.
Measurement input in ADP mode.
Independent operational amplifier negative input
Independent operational amplifier positive input
Independent operational amplifier output
DC signal low input in ACV/ACA mode. Connect to negative output
of external AC to DC converter.
I
O
O
-
-
-
-
-
-
-
G
I
I
I
I
I
O
O
NC
NC
SGND
IVSH
IVSL
ADP
OPIN-
OPIN+
OPOUT
ACVL
44
ACVH
O
DC signal high input in ACV/ACA mode. Connect to positive output
of external AC to DC converter.
45
46
47
48
49
ADI
ADO
TEST5
CA-
I
O
O
Negative input of internal AC-to-DC OPAMP.
Output of internal AC-to-DC OPAMP.
Buffer output of OVSG
IO Negative auto-zero capacitor connection for capacitor measurement
IO Positive auto-zero capacitor connection for capacitor measurement
CA+
ver. 2.8
3
12/01/12
CYRUSTEK [ Cyrustek corporation ]
