LTC1444IDHD#TRPBF

Overview

The LTC1444IDHD#TRPBF is an ultralow power quad comparator with a built-in reference, housed in a 16-lead (5mm × 4mm) plastic DFN package. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supply. The device features less than 8.5µA supply current over temperature and includes programmable hysteresis via the HYST pin. The internal reference voltage is 1.221V ±1%. Outputs are open-drain, capable of sinking current while maintaining microampere quiescent currents.

Feature Summary

• Ultralow quiescent current consumption across operating temperatures
• Built-in precision voltage reference output
• Programmable hysteresis capability for noise immunity
• Open-drain outputs compatible with various logic levels

Applications

• Battery-powered system monitoring
• Threshold detectors
• Window comparators
• Oscillator circuits

Procurement Notes

Verify the specific ID suffix indicates industrial temperature range (-40°C to 85°C). Confirm the DHD package designation matches the required surface mount footprint. Ensure the TRPBF suffix aligns with tape and reel handling requirements for automated assembly processes.

Selection Notes

Select this component when low power consumption is critical alongside precise threshold detection. The open-drain output requires external pull-up resistors. Use the programmable hysteresis feature to prevent false triggering in noisy environments. Verify input common mode range compatibility with the signal source.

Part Context

This part belongs to the LTC1443/LTC1444/LTC1445 family of micropower comparators. The LTC1444 variant specifically provides open-drain outputs and adjustable hysteresis, distinguishing it from the TTL/CMOS push-pull outputs of the LTC1443 and LTC1445 models within the same series.

Replacement Considerations

LTC1444CDHD#TRPBF offers identical functionality but is rated for commercial temperature range (0°C to 70°C) instead of industrial.