TIINA181A2IDBVR
Overview
The INA181A2IDBVR is a bidirectional current-sense amplifier designed for high-side or low-side current monitoring. It features a fixed gain of 50V/V and supports a common-mode voltage range from -0.2V to 26V, allowing for versatile sensing across various power rails. With a bandwidth of 350 kHz and rail-to-rail output, it is optimized for dynamic current measurement in space-constrained designs.
Why Choose This Part
This amplifier offers an excellent balance of speed and power consumption, drawing only 260uA typical supply current while maintaining a 2V/us slew rate. The SOT-23-6 package provides a small footprint for dense PCB layouts, and its ability to sense bidirectional current simplifies hardware design by eliminating the need for dual sensing circuits.
Applications
Key Specifications
Getting Started
For evaluation, TI offers the INA181EVM which allows for testing all four gain variants of the family. Ensure the shunt resistor value is chosen to keep the maximum differential input voltage within the linear output range for the 50V/V gain setting. Place a 0.1uF ceramic bypass capacitor close to the VS pin to minimize noise in high-frequency switching environments.
