LTC1541IS8#PBF

Overview

The LTC1541IS8#PBF is a micropower operational amplifier, comparator, and bandgap reference integrated 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 and has its inverting input internally connected to the 1.2V reference output. Both inputs support a common mode range extending from the negative supply to within 1.3V of the positive supply.

Feature Summary

• Integrates a micropower op amp, comparator, and 1.2V reference in a single 8-pin package
• Op amp provides rail-to-rail output swing and maintains stability driving capacitive loads up to 1000pF
• Comparator features internal hysteresis for clean switching on slow-moving signals
• Input common mode range extends from the negative supply rail to near the positive rail

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 sourcing. Confirm the IS8 designation corresponds to the industrial temperature grade (-40°C to 85°C) and the S8 package type (SOIC-8). Ensure the component matches the Analog Devices manufacturer identification to avoid counterfeit parts.

Selection Notes

Select this component for applications requiring low quiescent current and combined amplification and comparison functions. The industrial grade version is suitable for environments with wider temperature variations compared to commercial grades. Consider the 12kHz bandwidth limit for high-speed signal processing requirements.

Part Context

This part belongs to the LTC1541/LTC1542 family which combines analog signal conditioning components. The IS8 variant specifically denotes the industrial temperature range and SOIC-8 packaging. It serves as a pin-compatible upgrade for older MAX951/MAX953 devices while offering improved performance characteristics.

Replacement Considerations

LTC1541CS8#PBF

FAQ

How does the LTC1541 handle capacitive loads?

The op amp output stage is designed to maintain stability while driving capacitive loads up to 1000pF without external compensation.

What is the function of Pin 6 on the LTC1541?

Pin 6 serves as the Reference Output providing a stable 1.2V voltage and is also internally connected to the inverting input of the comparator.