LTC1541CDD#TRPBF

Overview

The Analog Devices LTC1541CDD#TRPBF is a micropower integrated circuit combining an operational amplifier, comparator, and bandgap reference in an 8-lead DFN 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, 12kHz gain-bandwidth product, and 700µV maximum offset voltage. The comparator includes internal hysteresis and connects its inverting input to the 1.2V reference output.

Feature Summary

• Integrates a unity-gain stable op amp, comparator, and precision reference within a compact footprint
• 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
• Supports extended common-mode input range extending from the negative supply rail

Applications

• Battery-powered systems requiring low quiescent current
• Automotive keyless entry modules
• Low frequency local area alarms and detectors
• Infrared receivers for remote controls
• Smoke detectors and safety sensors

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging with lead-free composition. Confirm the C grade designation aligns with the required commercial temperature specifications. Ensure the DFN package variant matches the target PCB footprint constraints. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and current availability status.

Selection Notes

Select this component when space is limited due to the small DFN package size. Choose this device for applications requiring simultaneous amplification and threshold detection without external references. Consider the 5µA supply current for strict power budgeting. Verify that the 12kHz bandwidth meets the signal processing requirements of the intended application.

Part Context

This part 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 portable electronics where power efficiency and board space are critical constraints. It consolidates multiple analog functions into a single monolithic solution.

Replacement Considerations

LTC1541CDD is a direct functional equivalent within the same package and specification profile.