INA2181A2IDSQT

Overview

The INA2181A2IDSQT is a dual-channel, bidirectional current-sense amplifier from the INAx181 family. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and supports common-mode input voltages from –0.2 V to +26 V. The device features a fixed gain of 50 V/V, a maximum quiescent current of 500 µA, and a bandwidth of 210 kHz. It provides rail-to-rail output swing with a slew rate of 2 V/µs and maintains an offset voltage of ±150 µV at zero common-mode voltage. The component is specified for operation across an extended temperature range of –40°C to +125°C.

Feature Summary

• Bidirectional sensing capability allows accurate monitoring of current flow in both directions by utilizing a reference voltage offset.
• Integrated matched resistor network minimizes gain error and reduces temperature drift for stable performance.
• Wide common-mode voltage range enables high-side and low-side configurations independent of the power supply voltage.

Applications

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

Procurement Notes

Verify the DSQ package designation and A2 gain variant against the specific datasheet revision. Confirm that the ordering suffix aligns with the required tape-and-reel specifications. Ensure the procurement channel sources components directly from Texas Instruments or authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this dual-channel variant when two independent current paths require monitoring within a single footprint. The 50 V/V gain option suits applications where moderate signal amplification is sufficient without excessive output saturation. Consider the 210 kHz bandwidth for dynamic load changes typical in motor drives or battery balancing tasks.

Part Context

This component belongs to the INAx181 series, which includes single-channel (INA181), dual-channel (INA2181), and quad-channel (INA4181) options. All variants share identical electrical characteristics regarding common-mode range, accuracy, and power consumption per channel, differing only in the number of integrated channels and corresponding package pin counts.

Replacement Considerations

Direct functional replacements include other INAx181 family members such as the INA2181A1IDSQT or INA2181A3IDSQT, provided the gain difference is accommodated by the system design. Single-channel equivalents like the INA181A2IDSQT can replace one half of the dual unit if the second channel remains unused.