AMC23C12DWVR

Overview

The AMC23C12DWVR is a fast-response, reinforced isolated window comparator manufactured by Texas Instruments. It features an adjustable trip threshold ranging from ±20mV to ±300mV in window mode, or 600mV to 2.7V in positive-comparator mode. The device provides high common-mode transient immunity of 55V/ns and operates with a propagation delay of 280ns typical. It supports a wide high-side supply range of 3V to 27V and a low-side supply range of 2.7V to 5.5V. Certified for reinforced isolation up to 7000VPK per VDE 0884-17 and 5000VRMS per UL1577, it functions reliably across the extended industrial temperature range of –40°C to +125°C.

Feature Summary

• Reinforced galvanic isolation barrier certified to DIN EN IEC 60747-17 and UL1577 standards.
• Adjustable trip threshold via external resistor on the REF pin for precise window or positive comparison modes.
• Open-drain output configurable for transparent operation or latch mode using the LATCH input pin.

Applications

• Overcurrent detection in motor drives
• Overvoltage detection in frequency inverters
• Protection monitoring in solar inverters
• Fault detection in DC/DC converters

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications. Confirm compliance with safety certification requirements relevant to your system design, specifically regarding working voltage ratings and insulation thickness. Ensure proper handling procedures are followed due to moisture sensitivity classification.

Selection Notes

Select this component when high-speed response and robust isolation are required for fault detection. The adjustable threshold allows flexibility for various sensing applications without changing hardware. Consider the thermal derating curves if operating near maximum power dissipation limits in enclosed environments.

Part Context

This part belongs to the AMC23C1x family of isolated comparators designed for high-voltage industrial applications. It complements other devices like the AMC23C10 and AMC23C11 by offering specific window-comparison capabilities with latch functionality. The DWV package variant ensures compatibility with standard surface-mount assembly processes while maintaining necessary creepage and clearance distances.

Replacement Considerations

AMC23C12DWVT

FAQ

How is the comparison mode determined?

The mode is determined by the voltage level on the REF pin. If the voltage is below approximately 550mV, the device operates as a window comparator. If the voltage exceeds this threshold, the negative comparator is disabled, and it functions as a positive comparator only.

What is the function of the LATCH pin?

The LATCH pin controls the output behavior. When tied to GND2, the output operates in transparent mode. When driven high, the output enters latch mode, holding its state until cleared by a falling edge on the LATCH input signal.