Datasheet
AD688
Rev. B | Page 5 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
+10V OUT FORCE
1
+V
S
2
+10V OUT SENSE
3
A3 IN
4
–V
S
16
–10V OUT FORCE
15
–10V OUT SENSE
14
A4 IN
13
GAIN ADJ
5
BAL ADJ
12
V
HIGH
6
NC
11
NOISE REDUCTION
7
NC
10
V
LOW
8
GND SENSE +IN
9
NC = NO CONNECT
AD688
TOP VIEW
(Not to Scale)
00815-002
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 +10 V OUT FORCE +10 V Output with Kelvin Force. Connect to Pin 3.
2 +V
S
Positive Power Supply.
3 +10 V OUT SENSE +10 V Output with Kelvin Sense. Connect to Pin 1.
4 A3 IN + Input to A3. Connect to V
HIGH
, Pin 6.
5 GAIN ADJ Reference Gain Adjustment for Calibration. See the Calibration section.
6 V
HIGH
Unbuffered Reference High Output.
7 NOISE REDUCTION
Noise Filtering Pin. Connect external 1 µF capacitor to ground to reduce output noise, see the
Noise Performance and Reduction section. May be left open.
8 V
LOW
Unbuffered Reference Low Output.
9 GND SENSE +IN Gound with Kelvin Sense.
10 NC No Connection. Leave floating.
11 NC No Connection. Leave floating.
12 BAL ADJ Reference Centering Adjustment for Calibration. See the Calibration section.
13 A4 IN + Input to A4. Connect to V
LOW
, Pin 8.
14 −10 V OUT SENSE −10 V Output with Kelvin Sense. Connect to Pin 15.
15 −10 V OUT FORCE −10 V Output with Kelvin Force. Connect to Pin 14.
16 −V
S
Negative Power Supply.