LT1715IMS

Overview

The LT1715IMS is an UltraFast dual comparator optimized for low voltage operation, housed in a 10-lead plastic MSOP package. It features independent input and output power supplies to allow separate analog input ranges and output logic levels without performance loss. The device offers a propagation delay of 4ns at 20mV overdrive and a maximum toggle frequency of 150MHz. Input voltage range extends from 100mV below VEE to 1.2V below VCC. Internal hysteresis ensures stability with slow-moving signals, while rail-to-rail outputs interface directly with TTL and CMOS logic.

Feature Summary

• Features separate supply pins for input and output stages, enabling flexible voltage configurations for analog inputs and digital outputs.
• Includes internal hysteresis to prevent oscillation and ensure stable operation with slowly moving input signals.
• Rail-to-rail output stage provides symmetric rise and fall times, allowing direct interfacing with TTL and CMOS logic levels.
• Pinout is optimized for high-speed use by placing sensitive inputs away from outputs, shielded by power rails to minimize parasitic effects.

Applications

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

Procurement Notes

Verify the specific suffix (e.g., IMS#TRPBF) against the datasheet order information to confirm temperature grade and packaging type. Ensure the selected variant matches the required operating temperature range, as specifications vary between C, I, and H grades. Confirm lead-free finish compliance if RoHS requirements are mandatory for the assembly process.

Selection Notes

Select this component when independent input and output supply voltages are required to accommodate different logic levels or signal ranges. Consider the 10-pin MSOP package constraints for PCB layout. Evaluate the need for external hysteresis if the application demands values exceeding the internal specification limits. Ensure supply sequencing does not violate absolute maximum ratings during power-up.

Part Context

The LT1715 belongs to Analog Devices' UltraFast comparator family, designed for high-speed applications requiring precise threshold detection. It serves as a dual-channel solution compared to single-channel variants like the LT1719. The device is suitable for systems needing fast response times with low power consumption, such as data acquisition and communication interfaces.

Replacement Considerations

Public confirmed substitute part numbers include LT1715HMS#TRPBF for extended temperature range operations. For single-channel equivalents with similar propagation delay, consider the LT1719. Dual/quad single-supply comparators with similar delay characteristics include the LT1720 and LT1721 series.