LT1720IMS8#TR

Overview

The LT1720IMS8#TR is a dual ultrafast comparator optimized for single supply operation within a 2.7V to 6V range. It features rail-to-rail outputs compatible with TTL and CMOS logic levels. The device offers a propagation delay of 4.5ns at 20mV overdrive and 7ns at 5mV overdrive, with a quiescent supply current of 4mA per comparator. It includes internal hysteresis and operates in the -40°C to 85°C temperature range.

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 simplifies usage with slow-moving input signals
• Input voltage range extends 100mV below the negative rail

Applications

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

Procurement Notes

Verify the IMS8 suffix corresponds to the 8-lead plastic MSOP package and the TR suffix indicates tape and reel packaging. Confirm the I grade designation ensures operation across the full industrial temperature range of -40°C to 85°C. Ensure compatibility with the required supply voltage and load conditions specified in the datasheet electrical characteristics.

Selection Notes

Select this component for applications requiring high speed and low power consumption in space-constrained designs. The dual configuration provides two independent comparators in a compact package. Consider the internal hysteresis for noise immunity without external components. Verify that the input common mode range and output drive capabilities meet the specific circuit requirements.

Part Context

This part belongs to the LT1720/LT1721 family of ultrafast comparators designed for single-supply operation. The LT1720 variant specifically provides dual channels, while the LT1721 offers quad channels. Both share similar performance characteristics, including low propagation delay and rail-to-rail outputs, making them suitable for portable and battery-powered systems.

Replacement Considerations

LT1720CMS8#TR (Commercial grade, same package)

FAQ

How does the internal hysteresis affect the comparator's performance?

The internal hysteresis prevents oscillations caused by noise or slow-moving input signals, ensuring stable output transitions without the need for external feedback components.

What is the input voltage range relative to the supply rails?

The input voltage range extends from 100mV below ground to 1.2V below the positive supply voltage (VCC).