INA181A2IDBVT

Overview

The INA181A2IDBVT is a precision, low-power current-sense amplifier from Texas Instruments. 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 bidirectional current sensing within a common-mode voltage range of -0.2 V to +26 V. Key electrical specifications include a typical CMRR of 100 dB, input offset voltage of 100 µV, and quiescent current of 260 µA. It utilizes an SOT-23-6 surface-mount package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrated matched resistor network for fixed gain operation
• Bidirectional sensing capability independent of supply voltage
• High common-mode rejection ratio for noise immunity
• Low power consumption suitable for battery-operated systems

Applications

• Industrial motor control and protection circuits
• Power management and distribution monitoring
• Battery charging and discharging current measurement
• Automotive electronic load sensing

Procurement Notes

Verify the specific suffix IDBVT indicates the tape-and-reel packaging variant when sourcing components. Confirm that the A2 designation corresponds to the required 50 V/V gain setting for your circuit design. Ensure compatibility with standard SOT-23-6 footprint layouts during PCB assembly planning.

Selection Notes

Select this component when a fixed 50 V/V gain is required for high-side or low-side current monitoring. It is appropriate for applications demanding wide common-mode voltage coverage up to 26 V. Consider this part for designs prioritizing low static current draw alongside precise differential signal amplification in compact form factors.

Part Context

This device belongs to the INA181 family of current-sense amplifiers designed for cost-sensitive applications. It shares architectural similarities with other members like the INA180 but offers distinct pinout and performance characteristics tailored for general-purpose sensing tasks requiring robust common-mode rejection.

Replacement Considerations

INA181A2IDBVR serves as a compatible alternative offering identical electrical specifications in a reel packaging format. Designers may also consider the INA181A1IDBVT if a lower gain of 20 V/V better suits the application requirements while maintaining similar package and performance traits.