LTC1542CMS8#PBF

Overview

The LTC1542CMS8#PBF is a micropower operational amplifier and comparator integrated in an 8-lead MSOP package. It operates from a single supply voltage range of 2.5V to 12.6V or dual supplies of ±1.25V to ±6.3V, with a typical supply current of 5µA. The op amp features rail-to-rail output swing, unity-gain stability, a gain bandwidth product of 12kHz, and a slew rate of 8V/ms. The input common mode range extends from the negative supply to within 1.3V of the positive supply. The comparator includes internal hysteresis of ±2.25mV for clean switching.

Feature Summary

• Combines a micropower op amp and comparator with rail-to-rail outputs in a compact 8-lead package
• Features low quiescent current consumption suitable for battery-powered applications
• Includes internal comparator hysteresis to ensure stable switching with slow-moving signals
• Operates over a wide supply voltage range with inputs including ground potential

Applications

• Battery or solar-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 specific suffix #PBF indicates lead-free compliance when ordering. Confirm the MSOP-8 package designation matches the required footprint. Check the commercial grade temperature specifications against the application environment requirements. Ensure the supply voltage constraints align with the system design before procurement.

Selection Notes

Select this component for designs requiring combined amplification and threshold detection with minimal power usage. The device is suitable for low-frequency signal processing where high bandwidth is not critical. Consider the internal comparator hysteresis for noise immunity in sensor interfaces. Verify that the capacitive load driving capability meets the output stage requirements.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower mixed-signal ICs. It serves as a pin-compatible upgrade for older MAX951/MAX953 devices. The family offers options for different packages including SO-8 and DFN variants. The LTC1542 specifically excludes the internal reference found in the LTC1541 variant.

Replacement Considerations

The datasheet identifies the MAX951 and MAX953 as compatible legacy parts for direct pin-for-pin replacement.