INA186A5QDCKRQ1

Overview

The INA186A5QDCKRQ1 is a bidirectional, low-power, voltage-output current sense amplifier from Texas Instruments. It features a fixed gain of 500 V/V and operates with a supply voltage range of 1.7V to 5.5V. The device supports common-mode voltages from -0.2V to +40V, independent of the supply voltage. Key electrical specifications include a maximum input bias current of 500 pA, an input offset voltage of 3 µV, and a gain bandwidth product of 27 kHz. It meets AEC-Q100 Grade 1 qualification for automotive applications.

Feature Summary

• Bidirectional current sensing capability allowing detection in both directions relative to ground.
• Zero-drift architecture providing low input offset voltage to extend dynamic range.
• Low input bias current enabling the use of larger sense resistors for precise microamp-level measurements.
• Automotive qualification compliant with AEC-Q100 standards.

Applications

• Overcurrent protection circuits
• Precision current measurement systems
• Closed-loop feedback control

Procurement Notes

Verify the specific suffix QDCKRQ1 corresponds to the DSBGA-6 package and AEC-Q100 Grade 1 automotive qualification. Confirm the fixed gain is 500 V/V as indicated by the 'A5' designation. Ensure compatibility with the required operating temperature range and supply voltage constraints before integration into the design.

Selection Notes

Select this component when high precision at low currents is required due to its zero-drift technology and low bias current. The 500 V/V gain is suitable for detecting small voltage drops across shunt resistors. Consider the DSBGA-6 package size for space-constrained PCB layouts. Verify that the 40V common-mode voltage range aligns with the system's bus voltage requirements.

Part Context

This part belongs to the INA186 family of current sense amplifiers designed for high-precision applications. The 'Q1' suffix denotes automotive grade reliability, while 'A5' specifies the internal fixed gain of 500 V/V. The 'DCK' indicates the DSBGA-6 package type. This series is engineered to minimize power loss through the use of smaller sense resistors without sacrificing measurement accuracy.

Replacement Considerations

Direct substitutes within the same family include other INA186 variants with different gains or packages, such as INA186A1QDCKRQ1 (25 V/V) or INA186A2IDCKRG4 (50 V/V). Cross-family replacements like the INA190 series offer similar functionality but may differ in bandwidth or noise characteristics. Always verify pinout and gain settings when substituting.