INA597 High-Precision, Wide-Bandwidth e-trim™ Difference Amplifier

1 Features

• Low offset voltage: 200 μV (maximum)

• Low offset voltage drift: ±5 μV/°C (maximum)

• Low noise: 18 nV/√Hz at 1 kHz

• Low gain error: ±0.03% (maximum)

• High common-mode rejection: 88 dB (minimum)

• Wide bandwidth: 2-MHz GBW

• Low quiescent current: 1.1 mA per amplifier

• High slew rate: 18 V/μs

• High capacitive load drive capability: 500 pF

• Wide supply range:

– Single-supply: 4.5 V to 36 V

– Dual-supply: ±2.25 V to ±18 V

• Specified temperature range:

–40°C to +125°C

• Packages: 8-pin SOIC and VSSOP, 10-pin VSON

2 Applications

• Data acquisition (DAQ)

• Sensor modules and tags for asset tracking

• Flow transmitter

• Optical module

• Power supply module

• AC drive position feedback

• Servo drive position feedback

• Voltage conditioning module

3 Description

The

INA597

is

a

low-power,

wide-bandwidth,

difference amplifier for cost-sensitive applications.

The INA597 consists of a precision operational

amplifier (op amp) and a precision resistor network.

Excellent tracking of resistors maintains gain accuracy

and common-mode rejection over temperature.

Unique features such as low offset (200 μV,

maximum), low offset drift (5 μV/°C maximum) high

slew rate (18 V/μs), and high capacitive load drive

of up to 500 pF make the INA597 a robust,

high-performance difference amplifier for high-voltage

industrial applications.

The common-mode range of the internal op amp

extends to the negative supply, and enables the

device to operate in single-supply applications. The

device operates on single (4.5 V to 36 V) or dual

supplies (±2.25 V to ±18 V).

The difference amplifier is the foundation of many

commonly used circuits. The INA597 provides this

circuit function without using an expensive precision

resistor network.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

INA597

SOIC (8)

4.90 mm × 3.91 mm

VSON (10)

3.00 mm × 3.00 mm

VSSOP (8)

3.00 mm × 3.00 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

16 Bits Out

AIN

ADC

V+

V±

REF

OUT

+IN

±IN

+

±

SENSE

VCC

INA597

6 k

12 k

6 k

,1

±,1

1

V

V

V

OUT

2

˜

12 k

Differential Input Data Acquisition

Offset Voltage (PV)

-80

80

-60

-40

-20

0

20

40

60

20

15

10

5

0

D004

Typical Distribution of Offset Voltage (RTO)

www.ti.com

INA597

SBOS385B – AUGUST 2019 – REVISED APRIL 2021

Copyright © 2021 Texas Instruments Incorporated

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INA597

SBOS385B – AUGUST 2019 – REVISED APRIL 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.