INA186A4QDDFRQ1

Overview

The INA186A4QDDFRQ1 is an AEC-Q100 qualified, bidirectional current-sense amplifier with a fixed gain of 200 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 input bias current of 500 pA. It includes an enable pin for low-power shutdown and offers high precision with a maximum offset voltage of ±50 µV and a minimum common-mode rejection ratio of 120 dB.

Feature Summary

• Bidirectional sensing capability enabled by the REF pin for monitoring current flow in both directions
• Low input bias current allows for accurate measurement of microamp-level currents using larger sense resistors
• Integrated enable pin reduces supply current to less than 0.1 µA when disabled
• High common-mode rejection ratio minimizes errors caused by DC common-mode voltage changes

Applications

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

Procurement Notes

Verify that the DDF package variant is required, as it uniquely provides the ENABLE pin functionality not present in other packages. Confirm the 'A4' suffix corresponds to the specific 200 V/V gain requirement for the design. Ensure automotive qualification compliance matches the target application's functional safety documentation needs.

Selection Notes

Select this part when bidirectional sensing is necessary alongside low power consumption. The 200 V/V gain suits applications requiring high resolution for small differential signals. Consider the DDF package specifically if system-level power management via the ENABLE pin is a design constraint compared to unidirectional alternatives.

Part Context

This component belongs to the INA186-Q1 family of automotive-grade current-sense amplifiers. It shares core specifications with other variants but is distinguished by its fixed 200 V/V gain and the inclusion of the ENABLE pin within the SOT-23-8 (DDF) package. This distinguishes it from unidirectional versions or those with different gain factors.

Replacement Considerations

INA186A4QDCKRQ1

FAQ

Does the INA186A4QDDFRQ1 support bidirectional current sensing?

Yes, the DDF package includes a REF pin that allows for bidirectional current sensing by applying an external reference voltage.

What is the function of the ENABLE pin on this device?

The ENABLE pin controls the device state; driving it to VS activates the amplifier, while driving it to GND disables the device and reduces quiescent current to approximately 10 nA.