LTC1541IDD#TRPBF

Overview

The LTC1541IDD#TRPBF is a micropower operational amplifier, comparator, and bandgap reference integrated 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, unity-gain stability, and a gain-bandwidth product of 12kHz. The comparator includes internal hysteresis and has its inverting input connected to the 1.2V reference output.

Feature Summary

• Combines a micropower op amp, comparator, and 1.2V reference in one package
• Op amp output swings rail-to-rail while driving capacitive loads up to 1000pF
• Comparator features internal hysteresis for clean switching on slow signals
• Input common mode range extends from negative supply to within 1.3V of 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 the specific suffix #TRPBF indicates tape and reel packaging and lead-free compliance. Confirm the IDD suffix corresponds to the industrial temperature grade (-40°C to 85°C). Ensure the DFN package variant matches the required footprint dimensions for the design.

Selection Notes

Select this component when low quiescent current is critical alongside precision amplification and comparison functions. The integrated reference eliminates external components for biasing applications. Consider the 12kHz bandwidth limit for high-speed signal processing requirements.

Part Context

This part belongs to the LTC1541/LTC1542 family of micropower mixed-signal ICs. The LTC1541 integrates the reference internally connected to the comparator, whereas the LTC1542 provides a separate comparator input. Both share identical op amp and power specifications.

Replacement Considerations

LTC1541IS8#PBF

FAQ

What is the maximum capacitive load the op amp can drive?

The op amp output is stable and can drive a capacitive load of up to 1000pF.

How is the comparator configured in the LTC1541?

In the LTC1541, the inverting input of the comparator is internally connected to the 1.2V reference output.

What is the input common mode voltage range?

The input common mode range extends from the negative supply (VSS) to within 1.3V of the positive supply (VCC).