LTC1445CDHD#PBF

Overview

The LTC1445CDHD#PBF 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 a 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. Outputs are TTL/CMOS compatible, capable of sourcing up to 40mA continuously. The internal reference voltage is 1.221V ±1%.

Feature Summary

• Ultralow quiescent current consumption
• Programmable hysteresis capability
• TTL/CMOS compatible outputs
• Wide supply voltage range

Applications

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

Procurement Notes

Verify the specific ordering suffix CDHD confirms the commercial temperature grade and DFN package configuration. Confirm lead-free finish status matches project requirements. Ensure compatibility with existing PCB footprints for the 16-lead DHD package before finalizing procurement orders.

Selection Notes

Select this component when low power consumption is critical alongside precise threshold detection. The integrated reference eliminates external components. Verify that the 40mA output drive capability meets load requirements. Consider the DFN package profile for space-constrained designs requiring surface mount assembly.

Part Context

This part belongs to the LTC1443/LTC1444/LTC1445 family of micropower comparators. It shares architectural similarities with the LTC1443 and LTC1444 but differs in output stage configuration and reference voltage. The family targets battery-operated applications requiring minimal standby current.

Replacement Considerations

LTC1443CDHD#PBF and LTC1444CDHD#PBF are pin-compatible upgrades within the same series. Verify output stage differences, as the LTC1444 uses open-drain outputs while the LTC1443 has separate ground.