INA186A4IDDFT

Overview

The INA186A4IDDFT is a high-precision, bidirectional current shunt monitor manufactured by Texas Instruments. It operates within a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -200 mV to 40 V. The device features a fixed gain of 200 V/V, a gain error of 0.04%, and an input bias current of 500 pA. It provides a common-mode rejection ratio (CMRR) of 150 dB and has a bandwidth of 33 kHz. Operating temperatures range from -40°C to +125°C, housed in an 8-pin SOT-23-THIN package.

Feature Summary

• Bidirectional measurement capability for both sourcing and sinking currents
• High precision with low offset voltage and minimal gain error
• Ultra-low input bias current for accurate sensing at low currents
• Wide common-mode voltage range supporting high-side monitoring

Applications

• Battery management systems
• Industrial process controls
• Power supply current monitoring

Procurement Notes

Verify the specific suffix IDDFT corresponds to the 8-SOT-23-THIN package and tape-and-reel orientation. Confirm the A-grade accuracy specifications match design requirements. Ensure compatibility with the target operating temperature range of -40°C to +125°C. Check for any recent lifecycle notices or obsolescence warnings from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when bidirectional high-side current sensing is required with high precision. The fixed 200 V/V gain suits applications needing significant signal amplification without external resistors. Consider the 500 pA input bias current for low-current accuracy needs. The wide common-mode range allows flexibility in system ground referencing compared to lower-voltage alternatives.

Part Context

This part belongs to the INA186 family of zero-drift current sense amplifiers. It shares architectural similarities with other members like the INA186A2IDDFT but differs in gain configuration and channel count. The family is designed for applications requiring high accuracy and stability over temperature variations.

Replacement Considerations

INA186A2IDDFT offers similar packaging but different gain characteristics. Verify functional equivalence regarding gain and bidirectional operation before substitution.