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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR 8SO
- 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：0°C ~ 70°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
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Overview
The LT1720CS8#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. Electrical specifications include a propagation delay of 4.5ns at 20mV overdrive and a supply current of 4mA per comparator at 5V. The common-mode input voltage extends 100mV below the negative rail.
Feature Summary
- Ultrafast response time with specified propagation delays under low overdrive conditions
- Rail-to-rail output stage enabling direct interface with standard digital logic families
- Internal hysteresis mechanism designed to prevent oscillation during signal transitions
- Input voltage range extending slightly below the negative power 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 component matches the specific C grade temperature rating and SOIC-8 package configuration. Confirm the presence of the PBF suffix indicating lead-free finish compliance. Ensure the ordering information aligns with the required operating temperature range for the intended application environment.
Selection Notes
Select this component when high speed and low power consumption are critical requirements. The dual-channel architecture reduces board space compared to single units. Consider the internal hysteresis for applications requiring noise immunity without external components. Verify that the supply voltage remains within the 2.7V to 6V operational limits.
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. The series is characterized by complementary bipolar technology, offering high slew rates and low dynamic current drain suitable for portable and battery-powered systems.
Replacement Considerations
LT1720CMS8#PBF: Same functional device but packaged in MSOP format instead of SOIC.
