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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR 8MSOP
- Series：UltraFast™
- Mfr：Analog Devices Inc.
- Package：Tube
- 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 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, alongside an input voltage range extending 100mV below ground. The device offers a propagation delay of 4.5ns at 20mV overdrive and draws 4mA per comparator. It includes internal hysteresis and is housed in an 8-lead MSOP package.
Feature Summary
- Ultrafast response time with 4.5ns propagation delay at 20mV overdrive
- Rail-to-rail outputs directly interface with TTL and CMOS logic levels
- Input voltage range extends 100mV below the negative supply rail
- Internal hysteresis ensures stable operation with slow-moving signals
Applications
- Crystal oscillator circuits
- High-speed differential line receivers
- Window comparators
- Threshold detectors and discriminators
- Zero-crossing detectors
Procurement Notes
Verify the specific suffix IMS8 corresponds to the 8-lead plastic MSOP package and I-grade temperature range (-40°C to 85°C). Confirm lead-free finish status and check for tape and reel availability if required for automated assembly processes.
Selection Notes
Select this component for applications requiring high speed and low power consumption in space-constrained designs. Ensure the supply voltage remains between 2.7V and 6V. Consider the internal hysteresis limits when designing for precise threshold detection without external feedback components.
Part Context
This part belongs to the LT1720/LT1721 family of UltraFast comparators from Analog Devices. The LT1720 variant specifically provides two independent comparators in an 8-pin configuration, distinguishing it from the quad-channel LT1721. The series is designed for systems where small size and low power are paramount.
Replacement Considerations
LT1720IS8#PBF (SOIC-8 package)
FAQ
What is the common mode input voltage range?
The common mode input voltage range extends from 100mV below ground to 1.2V below the supply voltage.
How does the device handle inputs below the negative rail?
The input stage allows voltages down to 100mV below ground. If inputs fall further below, phase reversal protection prevents false output inversion, though offset and hysteresis may increase significantly.
