AD8231-EP

Data Sheet

Rev. A | Page 8 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NC

–INA (IN-AMP –IN)

+INA (IN-AMP +IN)

NC

–VS

+VS

OUTA (IN-AMP OUT)

REF

NOTES

1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.

2. THE EXPOSED PAD CAN BE CONNECTED TO THE

NEGATIVE SUPPLY (–VS) OR LEFT FLOATING.

12

11

10

1

3

49

2

AD8231-EP

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 6. Pin Function Descriptions

Pin Number

Mnemonic

Description

1

NC

No Connect. Do not connect to this pin.

2

−INA (IN-AMP −IN)

Instrumentation Amplifier Negative Input.

3

+INA (IN-AMP +IN)

Instrumentation Amplifier Positive Input.

4

NC

No Connect. Do not connect to this pin.

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

−VS

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

12

+VS

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

Exposed Pad. Can be connected to the negative supply (−VS) or left floating.