LT1720CMS8#PBF

Overview

The LT1720CMS8#PBF is a dual 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 stability with slow-moving input signals. Propagation delay is specified at 4.5ns with 20mV overdrive and 7ns with 5mV overdrive. Supply current consumption is 4mA per comparator at 5V. The component is housed in an 8-lead plastic MSOP package and operates within a temperature range of 0°C to 70°C.

Feature Summary

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

Applications

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

Procurement Notes

Verify that the ordering suffix CMS8 corresponds to the 8-lead plastic MSOP package configuration. Confirm the C grade designation indicates an operating temperature range of 0°C to 70°C. Ensure the #PBF suffix is present to verify lead-free finish compliance. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity before procurement.

Selection Notes

Select this component when high speed and low power are critical requirements for single-supply applications. The dual configuration allows for two independent comparators in a compact footprint. Consider the internal hysteresis for noise immunity without external components. Verify that the 2.7V to 6V supply range aligns with system power constraints and that the MSOP package fits the available board space.

Part Context

This component belongs to the LT1720/LT1721 family of ultrafast comparators designed for systems where small size and low power are paramount. The LT1720 provides a dual-channel configuration, while the LT1721 offers four channels. Both families share similar electrical characteristics but differ in channel count and pinout configurations to accommodate various packaging options including DFN, SO, and SSOP.

Replacement Considerations

LT1720IMS8#PBF: Identical functional specifications with an extended industrial temperature range of -40°C to 85°C.