AD688

Rev. B | Page 5 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

+10V OUT FORCE

1

+10V OUT SENSE

3

A3 IN

4

16

–10V OUT FORCE

15

–10V OUT SENSE

14

A4 IN

13

GAIN ADJ

5

BAL ADJ

12

NC

11

NOISE REDUCTION

7

NC

10

GND SENSE +IN

9

NC = NO CONNECT

AD688

TOP VIEW

(Not to Scale)

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

Positive Power Supply.

3

+10 V OUT SENSE

+10 V Output with Kelvin Sense. Connect to Pin 1.

4

A3 IN

5

GAIN ADJ

Reference Gain Adjustment for Calibration. See the Calibration section.

6

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

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

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

Negative Power Supply.