LT1715IMS#TRPBF

Overview

The LT1715IMS#TRPBF is an UltraFast dual comparator featuring independent input and output power supplies. It offers a propagation delay of 4ns at 20mV overdrive and a maximum toggle frequency of 150MHz. The device operates with supply voltages ranging from 2.7V to 12V for the input stage and 2.7V to 6V for the output stage. It includes internal hysteresis, rail-to-rail outputs compatible with TTL and CMOS logic, and an input voltage range extending 100mV below the negative rail. Packaged in a 10-lead MSOP.

Feature Summary

• Features separate power supplies for analog inputs and digital outputs to allow flexible voltage level translation without performance loss.
• Includes specified internal hysteresis to ensure stable operation with slow-moving input signals and prevent oscillation.
• Rail-to-rail outputs directly interface with standard TTL and CMOS logic families.
• Pinout optimized for high-speed applications by shielding sensitive inputs away from outputs using power rails.

Applications

• High speed differential line receivers
• Level translators
• Window comparators
• Crystal oscillator circuits
• Threshold detectors and discriminators

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the IMS designation corresponds to the industrial temperature grade (-40°C to 85°C). Ensure the component matches the 10-lead MSOP physical package dimensions. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and lead-free status.

Selection Notes

Select this component when independent supply rails are required to decouple input signal ranges from output logic levels. It is suitable for applications demanding sub-5ns propagation delays and high toggle frequencies up to 150MHz. Consider the internal hysteresis for noise immunity in threshold detection scenarios requiring minimal external components.

Part Context

This device belongs to the UltraFast comparator family from Analog Devices. It shares architectural similarities with the LT1719 single comparator and the LT1720/LT1721 dual/quad variants. These parts are designed for high-speed signal processing where low propagation delay and precise threshold detection are critical requirements.

Replacement Considerations

LT1719IMS#TRPBF

FAQ

How does the LT1715 handle input signals that exceed the common mode range?

If one input remains within the common mode limit while the other exceeds it, the output polarity remains correct. If both inputs fall below the negative limit, phase reversal protection prevents false inversion, though offset and hysteresis may increase significantly.

What is the purpose of the separate VCC and +VS pins?

The separate VCC (input stage) and +VS (output stage) supplies allow independent setting of analog input voltage ranges and output logic levels. This enables flexible operation, such as translating signals between different voltage domains without compromising speed or accuracy.