LT1721CGN#TRPBF

Overview

The LT1721CGN#TRPBF is a quad ultrafast comparator from Analog Devices, optimized for single-supply operation within a voltage range of 2.7V to 6V. It features rail-to-rail outputs compatible with TTL and CMOS logic levels. The device includes internal hysteresis to ensure stable performance with slow-moving input signals. Key electrical characteristics include a propagation delay of 4.5ns at 20mV overdrive and a supply current of 4mA per comparator. The common mode input voltage extends from 100mV below ground to 1.2V below the positive supply rail.

Feature Summary

• Ultrafast response time with 4.5ns propagation delay at 20mV overdrive
• Rail-to-rail outputs directly interface with TTL and CMOS logic
• Internal hysteresis ensures stability with slow-moving input signals
• Input voltage range extends 100mV below the negative supply rail

Applications

• Crystal oscillator circuits
• High-speed differential line receivers
• Window comparators and threshold detectors
• Zero-crossing detectors
• High-speed sampling circuits

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing. Confirm the CGN suffix corresponds to the narrow SSOP package and commercial temperature range. Ensure compatibility with existing PCB footprints for the 16-lead SSOP form factor before procurement.

Selection Notes

Select this component for applications requiring high speed and low power in single-supply systems. The quad configuration allows multiple comparisons in a compact footprint. Consider the internal hysteresis for noise immunity without external components. Verify that the 2.7V to 6V supply range meets system requirements.

Part Context

This part belongs to the LT1720/LT1721 family of ultrafast comparators. The LT1721 variant provides four independent comparators in a 16-pin package, whereas the LT1720 offers two comparators in smaller packages. Both share similar electrical characteristics and pinout optimizations for high-speed performance.

Replacement Considerations

LT1721IGN#TRPBF serves as an industrial temperature grade replacement.