INA2181A2IDSQR

Overview

The INA2181A2IDSQR is a dual-channel, bidirectional current-sense amplifier from the INAx181 family. It features a fixed gain of 50 V/V and operates with a supply voltage range of 2.7 V to 5.5 V. The device supports a common-mode input voltage range from –0.2 V to +26 V, independent of the supply voltage. Key electrical characteristics include a maximum quiescent current of 500 µA, a bandwidth of 210 kHz, and an output slew rate of 2 V/µs. It provides rail-to-rail output swing and maintains high accuracy with a maximum gain error of ±1% over the extended temperature range of –40°C to +125°C.

Feature Summary

• Bidirectional sensing capability for monitoring current flow in both directions across sense resistors.
• Integrated matched resistor gain network minimizes gain error and reduces temperature drift.
• Wide common-mode voltage range allows operation in both high-side and low-side configurations.

Applications

• Motor control systems
• Battery monitors and balancers
• Power management circuits
• Lighting control applications

Procurement Notes

Verify the specific package suffix 'SQ' corresponds to the WSON-10 configuration as defined in the official datasheet. Confirm that the A2 designation matches the required 50 V/V gain for your circuit design. Ensure compatibility with the specified operating temperature range and supply voltage requirements before finalizing procurement.

Selection Notes

Select this component when dual-channel bidirectional current monitoring is required within a single package. The 50 V/V gain option suits applications needing moderate amplification of shunt voltages. Consider the 210 kHz bandwidth for dynamic load responses. Verify that the WSON-10 package fits the available PCB footprint constraints.

Part Context

This device belongs to the INAx181 family of cost-optimized current-sense amplifiers. The family includes single-channel (INA181), dual-channel (INA2181), and quad-channel (INA4181) variants. All devices share similar electrical characteristics but differ in channel count and package options, providing flexibility for various integration densities.

Replacement Considerations

Check for other INAx181 variants with different gains or channel counts if system requirements change. Verify pinout compatibility if substituting with packages like VSSOP-10 (DGS). Ensure any replacement maintains the 26 V common-mode range and bidirectional functionality.