LTC1542IDD#PBF

Overview

The LTC1542IDD#PBF is a micropower operational amplifier and comparator housed in an 8-lead, 3mm x 3mm DFN package. It operates from a single supply voltage ranging from 2.5V to 12.6V or dual supplies of ±1.25V to ±6.3V, with a typical quiescent current of 5µA. The op amp features rail-to-rail output swing, unity-gain stability, a gain-bandwidth product of 12kHz, and a slew rate of 8V/ms. The comparator includes internal hysteresis of ±2.25mV and CMOS/TTL compatible outputs.

Feature Summary

• Combines a micropower op amp and comparator in a single low-profile package
• Operates on a wide supply range from 2.5V to 12.6V with minimal power consumption
• Features rail-to-rail input and output capabilities for maximum dynamic range
• Includes internal comparator hysteresis to ensure clean switching

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 IDD suffix corresponds to the industrial temperature grade (-40°C to +85°C). Ensure the DFN package footprint matches the design requirements. Check for availability as distribution status may vary.

Selection Notes

Select this component for applications requiring ultra-low power consumption alongside precision amplification. The integrated comparator simplifies designs needing threshold detection without external components. Consider the DFN package for space-constrained layouts. Verify that the 12kHz bandwidth meets the signal processing speed requirements.

Part Context

This device belongs to the LTC1541/LTC1542 family of micropower analog circuits. While the LTC1541 integrates a bandgap reference, the LTC1542 focuses on the amplifier and comparator functions. Both share identical pinouts and electrical characteristics for the active stages, allowing for flexible system design based on reference needs.

Replacement Considerations

The datasheet identifies the MAX951 and MAX953 as pin-compatible upgrades. Verify functional equivalence regarding offset voltage and supply current before substitution.