LTC1445CS#PBF

Overview

The LTC1445CS#PBF is an ultralow power quad comparator with a built-in reference, manufactured by Analog Devices Inc. It features less than 8.5µA supply current over temperature and includes an internal reference of 1.221V ±1%. The device offers programmable hysteresis via the HYST pin and provides TTL/CMOS compatible outputs that can source up to 40mA. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supply. The input common mode range extends from the negative supply to within 1.3V of the positive supply. Propagation delay is typically 12µs with 10mV overdrive.

Feature Summary

• Ultralow quiescent current consumption of 8.5µA maximum
• Built-in voltage reference capable of driving a 0.01µF bypass capacitor without oscillation
• Programmable hysteresis using external resistors connected to the HYST pin
• TTL/CMOS compatible output stage capable of sourcing up to 40mA

Applications

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

Procurement Notes

Verify the specific suffix CS indicates a 16-lead plastic SO package and commercial temperature range (0°C to 70°C). Confirm RoHS compliance and lead-free finish status as indicated by the #PBF designation. Ensure compatibility with existing PCB footprints for the SOIC-16 package before procurement.

Selection Notes

Select this component when low power consumption is critical alongside the need for multiple comparator channels in a single package. The integrated reference simplifies design by eliminating external reference components. Consider the programmable hysteresis feature for noise immunity in threshold detection applications requiring precise switching points.

Part Context

This part belongs to the LTC1443/LTC1444/LTC1445 family of ultralow power quad comparators. While sharing similar core specifications, the LTC1445 differs from the LTC1443 by having a different reference voltage (1.221V vs 1.182V) and output configuration. It is distinct from the LTC1444 which features open-drain outputs instead of CMOS/TTL outputs.

Replacement Considerations

LTC1443CN#PBF and LTC1444CN#PBF are pin-compatible upgrades. Verify reference voltage requirements and output drive capabilities when substituting, as the LTC1443 has a 1.182V reference and the LTC1444 has open-drain outputs.