INA2181A2IDGSR

Overview

The INA2181A2IDGSR is a bidirectional current-sense amplifier from Texas Instruments. It features a fixed gain of 50 V/V and supports a common-mode voltage range up to 26 V. The device operates on a single supply voltage between 2.7 V and 5.5 V, with a typical supply current of 340 µA. Key electrical specifications include a maximum input offset voltage of 150 µV, a minimum common-mode rejection ratio (CMRR) of 80 dB, and a bandwidth of 350 kHz. It is housed in a 6-pin SC-70 package.

Feature Summary

• Bidirectional current sensing capability for monitoring both positive and negative current flow.
• Wide common-mode voltage range allowing operation independent of the power supply voltage.
• Integrated precision resistor network providing a fixed gain to minimize external component count.

Applications

• Battery management systems
• Power distribution units
• Industrial process control

Procurement Notes

Verify the specific suffix IDGSR corresponds to the SC-70-6 package and tape-and-reel quantity when ordering. Confirm that the fixed gain of 50 V/V meets the system's signal conditioning requirements. Ensure the 26 V common-mode limit aligns with the highest expected bus voltage in the application circuit design.

Selection Notes

Select this component when a low-profile surface-mount solution is required for bidirectional current monitoring. The fixed 50 V/V gain simplifies design compared to adjustable-gain alternatives. Consider the 350 kHz bandwidth for applications requiring moderate response speeds without excessive noise filtering complexity.

Part Context

This part belongs to the INA2181 family of current-sense amplifiers designed for cost-sensitive applications. It shares functional similarities with the INA181 series but offers specific packaging and gain configurations tailored for compact designs. The device integrates the gain-setting resistors internally to ensure high accuracy and stability across temperature variations.

Replacement Considerations

The INA181A2IDCKR is a verified substitute offering identical electrical performance in a different SC-70 variant package. Verify pinout compatibility and physical footprint dimensions before replacing the INA2181A2IDGSR with the INA181A2IDCKR in existing layouts.