A1

A2

A3

6kΩ

6kΩ

6

4

5

2

1

8

3

6kΩ

6kΩ

V

IN

–

RG

1

V

IN

+

RG

2

7

V–

V+

REF

INA217

G = 1 +

10kΩ

R

G

5kΩ

5kΩ

V

OUT

INA217

SBOS247C – JUNE 2002 – REVISED NOVEMBER 2015

www.ti.com

7 Detailed Description

7.1 Overview

The INA217 is a classical three-amp instrumentation amplifier designed for audio applications. Featuring low

noise and low distortion the INA217 is ideally suited for amplifying low level audio signals. With a wide supply

voltage, wide output voltage swing, and high output current drive the INA217 is also ideally suited for processing

high level audio signals. Specified from –40°C to 85°C the INA217 is well suited for industrial applications.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Basic Connections

Figure 13 shows the basic connections required for operation. Power supplies should be bypassed with 0.1-

μF

tantalum capacitors near the device pins. The output Reference (pin 5) should be a low-impedance connection.

Resistance of a few

Ωs in series with this connection will degrade the common-mode rejection of the INA217.

10

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