INA186A1QDDFRQ1

Overview

The INA186A1QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a fixed gain of 25 V/V. It operates from a 1.7 V to 5.5 V supply and supports common-mode voltages from -0.2 V to +40 V. Key electrical specifications include a maximum offset voltage of ±50 µV, a typical quiescent current of 48 µA, and a minimum common-mode rejection ratio of 120 dB. The device features an enable pin for low-power shutdown and is housed in an SC-70 (DDF) package.

Feature Summary

• Bidirectional current sensing capability enabled by the REF pin
• Low input bias current allowing use of larger sense resistors
• High precision with zero-drift architecture for accurate measurements
• Digital enable pin for reducing supply current in standby mode

Applications

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

Procurement Notes

Verify the specific suffix 'Q1' confirms automotive qualification and 'DDF' indicates the SOT-23-8 package with ENABLE functionality. Ensure the ordering code matches the required gain variant A1. Confirm compliance with AEC-Q100 Grade 1 temperature ratings during procurement validation.

Selection Notes

Select this component when bidirectional sensing is required within a 40-V common-mode range. The 25 V/V gain suits applications requiring lower amplification factors compared to higher gain variants. Consider the DDF package availability if hardware enable control is necessary for power management strategies.

Part Context

This part belongs to the INA186-Q1 family of high-precision current sense amplifiers designed for automotive environments. It shares core architectural features with other gain variants but differs in fixed gain settings and package options. The DDF package distinguishes it from unidirectional or non-enable versions within the same product line.

Replacement Considerations

Substitute with other INA186-Q1 gain variants (A2-A5) if gain adjustment is acceptable. Verify package compatibility between DDF and alternative packages like DBV or DCK, noting that only DDF includes the ENABLE pin function.