INA186A1QDBVRQ1

Overview

The INA186A1QDBVRQ1 is an automotive-grade, low-power current-sense amplifier with a fixed gain of 25 V/V. It operates on a single supply from 1.7 V to 5.5 V and supports common-mode voltages from -0.2 V to +40 V. The device features a typical quiescent current of 48 µA and picoamp-level input bias currents. It offers high precision with a maximum offset voltage of ±50 µV and a minimum common-mode rejection ratio of 120 dB. Qualified under AEC-Q100 Grade 1 for temperatures between -40°C and +125°C, it is housed in a 5-pin SOT-23 package.

Feature Summary

• Capacitively coupled front-end architecture provides ultra-low input bias currents and high common-mode rejection.
• Zero-drift design ensures precise measurements across wide temperature ranges with minimal offset drift.
• Rail-to-rail output swing maximizes dynamic range for accurate sensing near supply rails.
• Bidirectional sensing capability allows monitoring of current flow in both directions via the reference pin.

Applications

• Body control module (BCM)
• Telematics control unit
• Emergency call (eCall) systems
• 12-V battery management system (BMS)

Procurement Notes

Verify the specific suffix 'DBVR' corresponds to the SOT-23-5 package and tape-and-reel shipping format. Confirm that the 'A1' designation matches the required 25 V/V gain setting for your circuit design. Ensure the component meets AEC-Q100 Grade 1 requirements if operating in harsh automotive environments. Cross-reference the datasheet revision to confirm compatibility with your system's functional safety documentation needs.

Selection Notes

Select this part when a fixed gain of 25 V/V is sufficient for the target current range. The SOT-23-5 package is suitable for space-constrained designs where bidirectional sensing is not required, as the REF pin is internally grounded. Consider alternative gain options or packages if higher bandwidth or external reference control is necessary. Evaluate the trade-off between the low quiescent current and the specific noise performance requirements of the application.

Part Context

This component belongs to the INA186-Q1 family of automotive current-sense amplifiers. It shares core specifications such as the 40-V common-mode range and low power consumption with other variants. Differentiation occurs through fixed gain settings (A1 through A5) and package types (SOT-23-5, SC70, SOT-23-8). The DBVR suffix specifically identifies the SOT-23-5 variant without an enable pin.

Replacement Considerations

Direct substitutes within the same family include INA186A2QDBVRQ1 (50 V/V), INA186A3QDBVRQ1 (100 V/V), INA186A4QDBVRQ1 (200 V/V), and INA186A5QDBVRQ1 (500 V/V). These share identical pinouts and electrical characteristics except for gain. Non-family replacements require careful evaluation of gain, bias current, and package dimensions.