LTC1444IDHD#PBF

Overview

The LTC1444IDHD#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 dual ±1V to ±5.5V supply. The device features less than 8.5µA supply current, a 1.221V ±1% internal reference, and programmable hysteresis via the HYST pin. Outputs are open-drain, capable of sinking up to 5mA. Propagation delay is typically 12µs at 10mV overdrive. Input common mode range extends from V– to V+ – 1.3V.

Feature Summary

• Ultralow quiescent current consumption for battery-powered applications
• Built-in voltage reference output capable of driving bypass capacitors without oscillation
• Programmable hysteresis using external resistors connected to the HYST pin
• Open-drain outputs that eliminate crowbar switching currents during state transitions

Applications

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

Procurement Notes

Verify the specific ID suffix indicates the industrial temperature grade (-40°C to 85°C). Confirm the DHD package designation matches the required 16-lead DFN footprint. Ensure the #PBF suffix confirms lead-free and RoHS compliance status before finalizing procurement specifications.

Selection Notes

Select this component when low power consumption is critical alongside the need for multiple comparator channels. The open-drain output requires pull-up resistors for logic high states. Use the LTC1443 if TTL-compatible push-pull outputs are needed instead of open-drain configurations.

Part Context

This part belongs to the LTC1443/LTC1444/LTC1445 family of micropower comparators. The IDHD variant specifically denotes the industrial temperature range and the low-profile DFN packaging option, distinguishing it from PDIP or SO package versions within the same functional family.

Replacement Considerations

LTC1443CDHD#PBF offers similar functionality but with push-pull outputs instead of open-drain. LTC1445IDHD#PBF provides identical electrical characteristics and package but may differ in specific reference voltage tolerances or output drive capabilities compared to the open-drain design.