LTC1541CS8#PBF

Overview

The LTC1541CS8#PBF is a micropower integrated circuit combining an operational amplifier, comparator, and bandgap reference in an 8-lead SOIC 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, 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 1.2V bandgap reference in a single 8-pin package
• Operates on low supply currents with input common mode ranges extending to the negative rail
• Features rail-to-rail output capability for both the amplifier and comparator stages
• Includes internal comparator hysteresis to ensure clean switching with slow-moving signals

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 specific suffix #PBF indicates lead-free compliance when ordering. Confirm the CS8 designation corresponds to the commercial temperature grade and SOIC-8 package variant required for your design. Ensure the component meets RoHS directives applicable to your region before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring ultra-low power consumption in space-constrained designs. It serves as a pin-compatible upgrade for older MAX951/MAX953 devices. Consider the 12kHz bandwidth limit for signal processing requirements and verify that the 1.2V reference output meets the load regulation needs of your circuit.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower mixed-signal ICs. The CS8 suffix identifies the commercial temperature grade version housed in an 8-lead plastic Small Outline (SO) package. It is designed for portable electronics where minimizing quiescent current is critical while maintaining precision analog performance.

Replacement Considerations

The datasheet explicitly lists the MAX951 and MAX953 as pin-compatible upgrades. Verify electrical parameter compatibility, particularly regarding offset voltage and supply current, when substituting other generic op amps or comparators.