INA181A3IDBVT

Overview

The INA181A3IDBVT is a bidirectional, low- and high-side voltage output current-sense amplifier from Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and consumes 260 µA of quiescent current. The device features a fixed gain of 100 V/V, a gain bandwidth product of 150 kHz, and a common-mode voltage range spanning -200 mV to 26 V. Key electrical specifications include a maximum input offset voltage of 100 µV, a common-mode rejection ratio of 100 dB, and an input bias current of 75 µA. It supports operation temperatures from -40°C to +125°C and is housed in a SOT-23-6 package.

Feature Summary

• Supports bidirectional current sensing for both sourcing and sinking applications
• Enables low-side and high-side measurements with a wide common-mode voltage range
• Provides rail-to-rail output capability for direct interfacing with analog-to-digital converters

Applications

• Battery management systems requiring bidirectional charge/discharge monitoring
• Load switch control circuits for power distribution networks
• Overcurrent protection mechanisms in industrial equipment

Procurement Notes

Verify the specific suffix IDBVT corresponds to the SOT-23-6 surface-mount package configuration. Confirm that the A3 grade meets the required gain accuracy specifications for the target application. Ensure compatibility with the system's operating temperature range and supply voltage constraints before finalizing procurement decisions.

Selection Notes

Select this component when bidirectional current measurement is necessary within a single-supply architecture. The fixed 100 V/V gain simplifies design by eliminating external resistors while maintaining high precision. Consider the 26 V common-mode range for high-side placement and the low quiescent current for battery-powered efficiency requirements.

Part Context

This part belongs to the INA181 family of current-sense amplifiers designed for precision monitoring. The family offers various gain options and packaging styles to accommodate different board space and accuracy needs. The INA181 series is optimized for applications requiring accurate current feedback in compact form factors.

Replacement Considerations

Check for other INA181 variants with different gain codes or package types if pinout compatibility is not required. Verify functional equivalence with other bidirectional current-sense amplifiers offering similar common-mode ranges and gain accuracy.