INA186A3QDBVRQ1

Overview

The INA186A3QDBVRQ1 is an automotive-grade, low-power current-sense amplifier with a fixed gain of 100 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 maximum quiescent current of 90 µA and picoamp-level input bias currents. It provides bidirectional sensing capability via the REF pin and includes an ENABLE pin for power management.

Feature Summary

• Features a zero-drift architecture that minimizes offset voltage drift over temperature, enabling precise measurements with smaller sense resistors.
• Utilizes capacitively coupled inputs to achieve extremely low input bias currents, allowing accurate monitoring of microamp-level currents.
• Supports bidirectional current sensing by applying a reference voltage to the REF pin to offset the output signal.
• Includes an enable pin that reduces supply current to less than 0.1 µA when the device is disabled.

Applications

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

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 qualification for automotive environments. Ensure the 'A3' designation matches the required 100 V/V gain setting. Confirm the 'DBV' package corresponds to the SOT-23-5 form factor. Check datasheet revisions for any updates regarding functional safety documentation availability.

Selection Notes

Select this part when high precision at low currents is critical due to its picoamp input bias current. The 100 V/V gain suits applications requiring significant signal amplification for small shunt drops. Consider the DBV package limitations; it lacks a REF pin, restricting operation to unidirectional sensing unless internal grounding is utilized.

Part Context

This component belongs to the INA186-Q1 family of high-precision current sense amplifiers designed for cost-sensitive automotive systems. It shares core specifications like the 40-V common-mode range and low power consumption with other variants in the series, differentiated primarily by gain options and package configurations.

Replacement Considerations

INA186A2QDBVRQ1

FAQ

Does the INA186A3QDBVRQ1 support bidirectional current sensing?

No, the DBV package version does not have a REF pin. Bidirectional sensing requires the DDF or DCK packages which provide external access to the REF pin.

What is the typical quiescent current of this device?

The typical quiescent current is 48 µA at a 1.8 V supply. When disabled via the ENABLE pin, the current drops to approximately 10 nA.