INA2181A4IDGSR

Overview

The INA2181A4IDGSR is a dual-channel, bidirectional current-sense amplifier from Texas Instruments. It operates with a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages up to 26 V. The device features a fixed gain of 200 V/V and a bandwidth of 350 kHz. Key electrical specifications include an input offset voltage of 100 µV, a quiescent current of 500 µA per channel, and a maximum gain error of 0.1%. It is housed in a 10-VSSOP package.

Feature Summary

• Dual-channel architecture for simultaneous high-side current monitoring
• Bidirectional operation enabling detection of both positive and negative current flow
• High precision with low input offset voltage and minimal gain error
• Wide common-mode voltage range compatible with various bus voltages

Applications

• Battery management systems requiring precise cell or pack current measurement
• Industrial motor control circuits for phase current sensing
• Power supply overcurrent protection and load monitoring
• Data acquisition systems utilizing differential voltage inputs

Procurement Notes

Verify the specific suffix IDGSR corresponds to the VSSOP-10 package and tape-and-reel orientation. Confirm the A4 variant indicates the 200 V/V gain setting. Ensure compatibility with the target PCB footprint and reflow profile requirements for the specified surface-mount package.

Selection Notes

Select this component when dual-channel isolation is required within a single package. The 200 V/V gain suits applications with small sense resistor voltage drops. Consider the 350 kHz bandwidth for dynamic load responses. Verify that the 26 V common-mode limit exceeds the maximum system bus voltage under all operating conditions.

Part Context

This part belongs to the INA2181 family of current-sense amplifiers designed for low-voltage, high-precision applications. It serves as a dual-channel alternative to single-channel counterparts like the INA2181A2, offering space savings in multi-rail monitoring designs while maintaining similar accuracy and speed characteristics.

Replacement Considerations

Direct pin-compatible replacements may include other dual-channel variants within the INA2181 series with matching gain and package. Single-channel equivalents require two separate components and additional board space.