LT1671CMS8#TRPBF

Overview

The LT1671CMS8#TRPBF is a low-power, single-supply comparator featuring complementary CMOS/TTL outputs and an internal latch. It operates from a single 5V supply or dual ±5V supplies with a propagation delay of 60ns at 20mV overdrive. The input common-mode range extends to the negative supply rail, allowing ground sensing. Key electrical parameters include a maximum input offset voltage of 4.0mV, a typical power supply current of 450µA, and a common-mode rejection ratio of 100dB. It is housed in an 8-lead MSOP package.

Feature Summary

• Complementary outputs designed for direct interface with TTL or CMOS logic families
• Internal latch capability retains output data when the LATCH pin is held high
• Input common-mode range extends down to the negative supply rail for ground sensing
• Stable operation guaranteed without minimum input slew rate requirements

Applications

• High-speed analog-to-digital converters
• Zero-crossing detectors
• Current sense circuits for switching regulators
• Fast pulse height and width discriminators

Procurement Notes

Verify that the TRPBF suffix indicates tape-and-reel packaging rather than tube packaging. Confirm the CMS8 designation corresponds to the commercial temperature grade (-40°C to 85°C) and the MSOP-8 package style. Ensure compatibility with the specific supply voltage configurations required by the target circuit design.

Selection Notes

Select this component for applications requiring ground-sensing inputs and integrated data retention. The complementary output stage simplifies logic interfacing compared to open-collector alternatives. Consider the 60ns propagation delay and 450µA power consumption profile against higher-speed or lower-power comparator options available in the Analog Devices portfolio.

Part Context

This part belongs to the LT1671 family of comparators, which are characterized by their low power consumption and fast response times. The device shares pinout compatibility with other industry-standard comparators like the LT1394 and LT1016, facilitating drop-in replacements in existing designs requiring similar performance characteristics.

Replacement Considerations

LT1671CS8

FAQ

How does the internal latch function?

The internal latch retains the output state when the LATCH pin is driven high. Data must remain stable for at least 35ns after the latch signal goes high (hold time) and valid for at least 15ns before it goes high (setup time).

What is the input common-mode voltage range?

The input common-mode range extends from 1.5V below the positive supply down to the negative supply rail, enabling ground sensing capabilities.