LTC1541IDD#PBF

Overview

The LTC1541IDD#PBF is a micropower operational amplifier, comparator, and bandgap reference integrated in an 8-lead plastic DFN (3mm × 3mm) 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 offers rail-to-rail output swing, unity-gain stability, and a gain-bandwidth product of 12kHz. The comparator features 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 compact 3mm x 3mm DFN package
• Op amp provides rail-to-rail output swing and maintains stability driving capacitive loads up to 1000pF
• Comparator includes internal hysteresis for clean switching on slow-moving signals
• Input common mode range extends from the negative supply rail to within 1.3V of the positive supply

Applications

• Battery-powered systems
• Solar-powered systems
• Automotive keyless entry
• Low frequency local area alarms and detectors
• Infrared receivers for remote controls

Procurement Notes

Verify that the specific part number corresponds to the Industrial temperature grade (-40°C to +85°C) and the DD package variant. Confirm the presence of the #PBF suffix indicates lead-free compliance. Ensure the ordering suffix matches the required tape and reel configuration if applicable, as standard packaging may differ.

Selection Notes

Select this component when space constraints require a 3mm x 3mm footprint while maintaining low power consumption. It is suitable for applications requiring a stable internal reference voltage alongside signal conditioning. Consider the 12kHz bandwidth limit for high-speed requirements and verify that the 5µA quiescent current meets system battery life targets.

Part Context

This device belongs to the LTC1541/LTC1542 family, which integrates analog signal processing functions into a single chip. The IDD suffix denotes the industrial temperature grade, distinguishing it from commercial variants. The DFN package provides a low-profile solution compared to SO-8 or MSOP options available within the same functional family.

Replacement Considerations

The datasheet identifies the MAX951 and MAX953 as pin-compatible upgrades. Verify electrical specifications against these alternatives to ensure compatibility with existing circuit designs.