LTC1541CS8#TRPBF

Overview

The LTC1541CS8#TRPBF is a micropower operational amplifier, comparator, and bandgap reference integrated in an 8-lead SOIC 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 swing, unity-gain stability, and a gain-bandwidth product of 12kHz. The comparator includes internal hysteresis of ±2.25mV and has its inverting input internally connected to the 1.2V reference output.

Feature Summary

• Combines a micropower op amp, comparator, and 1.2V reference in a single 8-pin package
• Op amp output stage swings rail-to-rail while driving capacitive loads up to 1000pF
• Comparator provides clean switching via internal hysteresis even with slow-moving signals
• Reference output can source up to 2mA and drive 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 that the #TRPBF suffix confirms tape and reel packaging and lead-free compliance. Confirm the 'C' grade designation matches the required commercial temperature range specifications. Ensure the SOIC-8 package dimensions align with the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when space is limited due to the integration of three functions in an 8-pin package. Choose the LTC1541 over the LTC1542 if the application requires the comparator's inverting input to be tied to the internal reference. Verify that the 12kHz bandwidth meets the signal processing requirements for low-frequency applications.

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 device is available in MSOP, SO-8, and DFN packages to accommodate various board space requirements.

Replacement Considerations

LTC1541CS8#PBF (Tube Packaging)

FAQ

How does the LTC1541 handle capacitive loads on the op amp output?

The op amp maintains stability in unity-gain configuration while driving capacitive loads up to 1000pF.

What is the function of the internal hysteresis in the comparator?

The internal hysteresis of ±2.25mV ensures clean output switching even when the input signals are moving slowly.