LTC1542IMS8#PBF

Overview

The LTC1542IMS8#PBF is a micropower operational amplifier and comparator 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, a gain-bandwidth product of 12kHz, and a slew rate of 8V/ms. 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 a comparator with internal hysteresis in a single 8-pin package
• Op amp output stage swings rail-to-rail while maintaining stability driving capacitive loads up to 1000pF
• Comparator input range includes ground and extends to within 1.3V of the positive supply rail
• Low quiescent current consumption suitable for battery-powered applications

Applications

• Battery-operated systems requiring low power consumption
• Automotive keyless entry systems
• 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 sourcing this component. Confirm the IMS8 designation corresponds to the 8-lead MSOP package variant required for your PCB layout. Ensure the industrial temperature grade matches your environmental operating conditions. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status.

Selection Notes

Select the LTC1542 over the LTC1541 if an external reference voltage is needed rather than an internal bandgap reference. This device is appropriate for applications requiring both amplification and threshold detection without additional components. Consider the 12kHz bandwidth limit for signal processing speeds. Verify that the 1nA maximum input bias current meets the impedance requirements of your sensor interface.

Part Context

This component belongs to the LTC1541/LTC1542 family of micropower mixed-signal ICs. It serves as a pin-compatible upgrade for older MAX951/MAX953 devices. The series is designed for space-constrained environments where low power and high precision are critical. It integrates functions typically requiring separate discrete components into a compact footprint.

Replacement Considerations

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