INA2128 Dual, Low-Power Instrumentation Amplifier

1 Features

• Low offset voltage: 50 µV max

• Low drift: 0.5 µV/°C max

• Low input bias current: 5 nA max

• Input voltage noise: 8 nV/√Hz at 1 kHz

• High bandwidth: 1.3 MHz at G=1 V/V

• High CMR: 120 dB min

• Inputs protected to ±40 V

• Wide supply range: ±2.25 V to ±18 V

• Low quiescent current: 700 µA per channel

• Temperature range: –40°C to +85°C

• Package: 16-pin SOIC

2 Applications

• Pressure transmitter

• Temperature transmitter

• Weigh scale

• Electrocardiogram (ECG)

• Analog input module

• Data acquisition (DAQ)

3 Description

The INA2128 is a dual, low-power, general-purpose

instrumentation

amplifier

(IA)

offering

excellent

accuracy. The versatile three-op-amp design and

small size make this device an excellent choice for

a wide range of applications. Current-feedback input

circuitry provides wide bandwidth, even at high gain

(200 kHz at G = 100). A single external resistor sets

any gain from 1 to 10,000. Internal input protection

can withstand up to ±40 V without damage.

The INA2128 is laser-trimmed for very low offset

voltage (50 µV), drift (0.5 µV/°C) and high common-

mode rejection (120 dB at G ≥ 100). The device

operates with power supplies as low as ±2.25 V,

and quiescent current is only 700 µA per IA—a

great choice for battery-operated and multiple-channel

systems.

The INA2128 is available in an SOIC-16 package, and

is specified from –40°C to +85°C.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

INA2128

DW (SOIC, 16)

10.3 mm × 10.3 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

Simplified Schematic

INA2128

SBOS035B – DECEMBER 1995 – REVISED MAY 2023

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.