INA149 Datasheet – Unity-Gain Difference Amplifier ( PDF )

Part Number: INA149

Function: High Common-Mode Voltage Difference Amplifier

Package: SOIC-8 Type

Manufacturer: Texas Instruments


INA149 datasheet



The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin film resistor network.

The device can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The IC inputs are protected from momentary common-mode or differential overloads of up to 500 V.


1. AC Performance :

(1) Bandwidth: 500 kHz
(2) Typical Slew Rate: 5 V/µs

2. Wide Supply Range: ±2.0 V to ±18 V

(1) Maximum Quiescent Current: 900 µA
(2) Output Swing on ±15-V Supplies: ±13.5 V


1. High-Voltage Current Sensing

2. Battery Cell Voltage Monitoring

3. Power-Supply Current Monitoring

4. Motor Controls

5. Replacement for Isolation Circuits

Other data sheets are available within the file: INA-149, INA149A


INA149 Datasheet PDF Download

INA149 pdf