AMC22C11QDRQ1

Overview

The AMC22C11QDRQ1 is an automotive-grade, fast-response, basic isolated comparator featuring an adjustable threshold and latch function. It operates with a high-side supply range of 3V to 25V and a low-side supply range of 2.7V to 5.5V. The device provides a trip threshold error of ±1% (max) at 250mV and supports an open-drain output with optional latch mode. It achieves a propagation delay of 240ns typical and offers high common-mode transient immunity of 75V/ns minimum. Certified for basic isolation up to 4250VPK per DIN EN IEC 60747-17 and 3000VRMS per UL1577.

Feature Summary

• Features a wide high-side supply range supporting voltages from 3V to 25V alongside a standard low-side supply range.
• Provides an adjustable trip threshold via a single external resistor, selectable between low-hysteresis and high-hysteresis modes.
• Includes an open-drain digital output that supports both transparent mode and a latch mode controlled by a dedicated input pin.
• Offers certified galvanic isolation barrier resistant to magnetic interference with high common-mode transient immunity.

Applications

• Overcurrent or overvoltage detection in HEV/EV charging piles
• Protection circuits in HEV/EV onboard chargers (OBC)
• Fault detection in HEV/EV DC/DC converters
• Current sensing interfaces in HEV/EV traction inverters

Procurement Notes

Verify the specific ordering suffix matches the required package variant, as the QDRQ1 designation indicates the SOIC-8 tape-and-reel configuration. Confirm that the application environment adheres to the specified safety limiting values for current and power dissipation to maintain isolation integrity. Ensure PCB layout maintains the required creepage and clearance distances to preserve the certified isolation ratings during operation.

Selection Notes

Select this component when a fast response time and adjustable threshold are required for high-voltage side monitoring. The device is suitable for applications needing basic isolation certification rather than reinforced isolation. Consider the open-drain output requirements and the need for external pull-up resistors. Verify that the high-side voltage does not exceed the absolute maximum ratings while maintaining sufficient headroom for the reference voltage.

Part Context

This part belongs to Texas Instruments' AMC22C11-Q1 family of automotive isolated comparators. It is designed specifically for harsh automotive environments, meeting AEC-Q100 Grade 1 qualification standards. The device integrates a high-speed comparator with a robust isolation barrier, distinguishing it from standard non-isolated comparators by its ability to handle high common-mode transients and provide galvanic separation between high-voltage inputs and low-voltage control logic.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.