AD8231

Data Sheet

Rev. E | Page 8 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

NC

(IN-AMP –IN) –INA

(IN-AMP +IN) +INA

NC

OUTA (IN-AMP OUT)

REF

NOTES

1. NC = NO CONNECT.

2. THE EXPOSED PAD CAN BE CONNECTED TO THE NEGATIVE

12

11

10

1

3

4

9

2

AD8231

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 6. Pin Function Descriptions

Pin Number

Mnemonic

Description

1

NC

No Connect.

2

−INA (IN-AMP −IN)

Instrumentation Amplifier Negative Input.

3

+INA (IN-AMP +IN)

Instrumentation Amplifier Positive Input.

4

NC

No Connect.

5

SDN

Shutdown.

6

+INB

Operational Amplifier Positive Input.

7

−INB

Operational Amplifier Negative Input.

8

OUTB (OP AMP OUT)

Operational Amplifier Output.

9

REF

Instrumentation Amplifier Reference Pin. It should be driven with a low impedance. Output is

referred to this pin.

10

OUTA (IN-AMP OUT)

Instrumentation Amplifier Output.

11

Negative Power Supply. Connect to ground in single-supply applications.

12

Positive Power Supply.

13

CS

Chip Select. Enables digital logic interface.

14

A0

Gain Setting Bit (LSB).

15

A1

Gain Setting Bit.

16

A2

Gain Setting Bit (MSB).

EPAD