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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR 8MSOP
- Series：UltraFast™
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：2
- Output Type：CMOS, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±)：2.7V ~ 6V
- Voltage - Input Offset (Max)：3mV @ 5V
- Current - Input Bias (Max)：6µA @ 5V
- Current - Output (Typ)：20mA
- Current - Quiescent (Max)：7mA
- CMRR, PSRR (Typ)：70dB CMRR, 80dB PSRR
- Propagation Delay (Max)：10ns
- Hysteresis：7mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-MSOP
- Grade：-
- Qualification：-
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Overview
The LT1720IMS8#TRPBF 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 offers a propagation delay of 4.5ns at 20mV overdrive and includes internal hysteresis to ensure stable performance with slow-moving input signals. Packaged in an 8-lead MSOP, it operates across an industrial temperature range of -40°C to 85°C.
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 prevents oscillation 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 that the ordering suffix #TRPBF confirms tape-and-reel packaging and lead-free finish. Confirm the IMS8 designation matches the required 8-lead MSOP package. Ensure the 'I' grade suffix corresponds to the necessary -40°C to 85°C operating temperature range for your specific application environment.
Selection Notes
Select this component when high speed and low power are critical constraints. It is suitable for systems requiring direct interfacing to digital logic without external level shifting. Consider the internal hysteresis for noise immunity. Evaluate the MSOP package dimensions against available board space requirements compared to SO or DFN alternatives.
Part Context
This part belongs to the LT1720/LT1721 family of UltraFast comparators. The LT1720 variant provides two independent channels in an 8-pin package, while the LT1721 offers four channels. Both share identical electrical characteristics and pinout optimizations designed to minimize parasitic effects by shielding sensitive inputs between power rails.
Replacement Considerations
LT1720IMS8#PBF (Tube version)
FAQ
How does the internal hysteresis affect the input trip points?
The LT1720 includes internal hysteresis which defines distinct positive and negative trip points. This creates a dead band that prevents output oscillation caused by noise on slowly varying input signals.
What is the common mode input voltage range?
The common mode input voltage range extends from 100mV below ground to 1.2V below the positive supply voltage (VCC).
