LTC1541IMS8#PBF

Overview

The LTC1541IMS8#PBF is a micropower operational amplifier, comparator, and bandgap reference integrated in an 8-lead MSOP package. It operates from a single supply 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, unity-gain stability, and a gain-bandwidth product of 12kHz. The comparator includes internal hysteresis of ±2.25mV. The device provides a 1.2V ±1% reference output capable of sourcing up to 2mA.

Feature Summary

• Combines a micropower op amp, comparator, and precision reference in a single 8-pin package
• Op amp output stage swings rail-to-rail while maintaining unity-gain stability
• Comparator input range includes ground and extends to within 1.3V of the positive supply
• Internal 1.2V reference output can drive capacitive loads without oscillation

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 and RoHS adherence as per manufacturer standards. Confirm the IMS8 designation corresponds to the 8-lead plastic MSOP package variant. Ensure the industrial temperature grade (I) matches the required operating range of -40°C to +85°C for the intended application environment.

Selection Notes

Select this component when space is limited due to its integration of three functions into one package. Choose the LTC1541 over the LTC1542 if an internal reference connected to the comparator inverting input is required. Consider the low quiescent current for battery-operated designs requiring extended life. Verify that the 12kHz bandwidth meets the signal processing speed 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 devices like the MAX951/MAX953. The family offers variations in packages including SO-8 and DFN, providing flexibility for different board layout constraints while maintaining consistent electrical performance characteristics across the series.

Replacement Considerations

The datasheet identifies the LTC1541/LTC1542 as a pin-compatible upgrade for the MAX951 and MAX953. Designers replacing these legacy parts should verify that the new supply voltage range and input common mode specifications are compatible with the existing circuit design.