LTC1541CMS8#PBF

Overview

The LTC1541CMS8#PBF is a micropower operational amplifier, comparator, and bandgap reference integrated in an 8-lead MSOP package. It operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical quiescent current of 5µA. The op amp features rail-to-rail output swing, unity-gain stability, and a typical gain-bandwidth product of 12kHz. The comparator includes internal hysteresis for clean switching. The LTC1541 variant provides a 1.2V ±1% reference output capable of sourcing up to 2mA.

Feature Summary

• Combines a micropower op amp, comparator, and voltage reference in a single compact package
• Op amp output stage swings rail-to-rail while maintaining stability with capacitive loads
• Comparator input range includes ground with internal hysteresis for noise immunity
• Integrated 1.2V reference output drives bypass capacitors without oscillation

Applications

• Battery-powered systems
• Automotive keyless entry
• Low frequency local area alarms and detectors
• Infrared receivers for remote controls
• Smoke detectors and safety sensors

Procurement Notes

Verify the suffix #PBF indicates lead-free compliance and #MS8 confirms the 8-lead plastic MSOP package. Confirm the 'C' grade designation matches the required commercial temperature range specifications. Ensure the source document explicitly lists this part number as available from Analog Devices Inc. distributors.

Selection Notes

Select this component when space is limited due to its small MSOP footprint. Choose the LTC1541 over the LTC1542 if an internal reference and comparator trip point are required. Verify that the 12kHz bandwidth and 5µA supply current meet the system's power and speed constraints. Ensure the input common mode range extending to the negative rail suits the signal source.

Part Context

This device belongs to the LTC1541/LTC1542 family of micropower mixed-signal ICs. It serves as a pin-compatible upgrade for older parts like the MAX951/MAX953. The family offers multiple package options including SO-8 and DFN variants to accommodate different board space requirements while maintaining identical electrical performance characteristics.

Replacement Considerations

Public confirmed substitute part numbers include LTC1542CMS8#PBF for applications not requiring the internal reference.