INA186A3QDCKRQ1

Overview

The Texas Instruments INA186A3QDCKRQ1 is a bidirectional, low-power, voltage-output current sense amplifier designed for high-precision applications. 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. The device features a fixed gain of 100 V/V, a gain bandwidth product of 35 kHz, and a maximum input bias current of 500 pA. It achieves an input offset voltage as low as 3 µV and offers a common-mode rejection ratio of 150 dB. Qualified under AEC-Q100 standards, it functions within a temperature range of -40°C to +125°C and is housed in a compact SC-70-6 package.

Feature Summary

• Bidirectional detection capability allows accurate measurement of current flow in both directions across the shunt resistor.
• Zero-drift architecture minimizes input offset voltage drift over temperature, extending dynamic range for precise low-level signal detection.
• Low input bias current enables the use of larger sensing resistors without significant accuracy loss, facilitating microampere-level measurements.
• High common-mode rejection ratio ensures reliable performance in noisy environments with high common-mode voltages.

Applications

• Overcurrent protection circuits in automotive systems
• Precision current monitoring for battery management systems
• Closed-loop feedback control in motor drives

Procurement Notes

Verify that the specific suffix QDCKRQ1 corresponds to the SC-70-6 package and AEC-Q100 automotive qualification. Confirm the gain setting matches the required application circuitry, as this variant has a fixed internal gain. Ensure compatibility with the target PCB footprint and reflow soldering profiles specified in the official datasheet.

Selection Notes

Select this component when bidirectional current sensing is required alongside high precision and automotive reliability. The fixed 100 V/V gain suits applications where moderate amplification is needed without external resistors. Consider the SC-70-6 package size for space-constrained designs. Evaluate the 35 kHz bandwidth against the system's noise requirements and switching frequencies.

Part Context

This part belongs to the INA186 family of current sense amplifiers, which are characterized by their zero-drift technology and low power consumption. The 'Q' designation indicates automotive grade qualification, while 'A3' specifies the 100 V/V gain option. The 'DCK' code identifies the SC-70-6 surface-mount package, and 'RQ1' denotes reel packaging with automotive compliance.

Replacement Considerations

Direct substitutes within the same family include INA186A1QDCKRQ1 (25 V/V), INA186A2QDCKRQ1 (50 V/V), INA186A4QDCKRQ1 (200 V/V), and INA186A5QDCKRQ1 (500 V/V). These parts share identical pinouts, packages, and electrical characteristics except for the fixed internal gain value.