INA186A1QDCKRQ1

Overview

The INA186A1QDCKRQ1 is a bidirectional, low-power, voltage-output current sense amplifier from Texas Instruments. It operates with a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -0.2 V to +40 V, independent of the supply. This automotive-grade device features a fixed gain of 25 V/V, a gain bandwidth product of 45 kHz, and an input bias current of 500 pA. It offers a typical input offset voltage of -3 µV, a common-mode rejection ratio of 150 dB, and a gain error of -0.04%. The component is qualified to AEC-Q100 standards and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift architecture enables precise current measurement with minimal offset voltage errors.
• High common-mode rejection ratio ensures accurate signal integrity in noisy environments.
• Low input bias current allows for the use of larger sense resistors without significant accuracy loss.

Applications

• Overcurrent protection circuits
• Precision current measurement systems
• Closed-loop feedback control

Procurement Notes

Verify the specific suffix QDCKRQ1 confirms AEC-Q100 automotive qualification and SC-70-6 packaging. Ensure the 'A1' designation matches the required 25 V/V gain setting. Confirm RoHS compliance status through official manufacturer documentation before integration into production designs.

Selection Notes

Select this component when high precision is required at low currents due to its zero-drift technology. The 40 V common-mode range suits high-side sensing applications. Compare against other gain variants if system output voltage requirements differ from the 25 V/V configuration.

Part Context

This part belongs to the INA186-Q1 family of current sense amplifiers designed for automotive applications. It shares architectural similarities with non-automotive INA186 parts but includes rigorous testing for automotive reliability and temperature stability.

Replacement Considerations

Direct substitutes include other INA186-Q1 variants with different gains (e.g., INA186A2QDCKRQ1 for 50 V/V). Verify pin compatibility and electrical specifications match before substitution.

FAQ

What is the fixed gain of the INA186A1QDCKRQ1?

The fixed gain is 25 V/V.

Does this device support bidirectional current sensing?

Yes, it is a bidirectional current sense amplifier capable of detecting positive and negative currents.