Texas Instruments INA181
The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for costoptimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at commonmode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V.| Part No. | INA181 |
|---|---|
| Datasheet | INA181 Download |
| Manufacturer |  Texas Instruments |
| Description | Bidirectional low- and high-side voltage output current-sense amplifiers |
| Buy | Stock & Price |
FEATURES
● Common-mode range (VCM): –0.2 V to +26 V● High bandwidth: 350 kHz (A1 devices)
● Offset voltage: – ±150 µV (maximum) at VCM = 0 V – ±500 µV (maximum) at VCM = 12 V
● Output slew rate: 2 V/µs
● Bidirectional current-sensing capability
● Accuracy: – ±1% gain error (maximum) – 1-µV/°C offset drift (maximum)
● Gain options: – 20 V/V (A1 devices) – 50 V/V (A2 devices) – 100 V/V (A3 devices) – 200 V/V (A4 devices)
● Quiescent current: 260 µA maximum (INA181) 2
APPLICATIONS
● Motor control● Battery monitors and balancers
● Power management
● Lighting control
● Solar inverters Bus Voltage, VCM Up To 26 V RSENSE Load Power Supply, VS 2.7 V to 5.5 V CBYPASS 0.1 µF INA4181 (quad-channel) INA2181 (dual-channel) INA181 (single-channel) VS IN± Microcontroller ± + IN+ OUT REF ADC GND Copyright © 2017, Texas Instruments Incorporated Typical Application Circuit 3
DESCRIPTION
This matched gain resistor network minimizes gain error and reduces the temperature drift. These devices operate from a single 2.7-V to 5.5V power supply.
