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Product Detailed Parameters
- Description：IC COMPARATOR 4 W/VOLT REF 16DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：4
- Output Type：CMOS, Open-Drain, TTL
- Voltage - Supply, Single/Dual (±)：2V ~ 11V, ±1V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：0.015mA @ 5V
- Current - Quiescent (Max)：8.5µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：12µs
- Hysteresis：50mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：16-DIP (0.300", 7.62mm)
- Mounting Type：Through Hole
- Supplier Device Package：16-PDIP
- Grade：-
- Qualification：-
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Overview
The LTC1444IN#PBF is an ultralow power quad comparator with a built-in reference, housed in a 16-lead PDIP 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 a 1.221V ±1% internal reference. Outputs are open-drain for the LTC1444, supporting TTL/CMOS compatibility. Hysteresis is programmable via the HYST pin using two resistors.
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 controlled by external resistors connected to the HYST pin
- Open-drain output configuration eliminating crowbar switching currents
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific ordering suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the 'IN' designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 16-lead PDIP package matches the target PCB footprint. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision history.
Selection Notes
Select this component when low power consumption is critical alongside precise threshold detection. The LTC1444 differs from the LTC1443 by offering open-drain outputs and programmable hysteresis rather than fixed CMOS outputs. Verify that the input common mode range extending to V+ – 1.3V meets signal requirements. Consider the 12µs typical propagation delay for timing-sensitive applications.
Part Context
This device belongs to the LTC1443/LTC1444/LTC1445 family of micropower comparators. While sharing similar core specifications like supply current and reference accuracy, the LTC1444 specifically provides open-drain outputs and adjustable hysteresis. It serves as a pin-compatible upgrade option for legacy designs requiring enhanced noise immunity through programmable thresholds.
Replacement Considerations
LTC1444IS#TRPBF (SOIC Package)
FAQ
How is hysteresis configured on the LTC1444?
Hysteresis is programmed using two resistors connected between the REF and HYST pins. The maximum hysteresis voltage band is 100mV.
What is the output type of the LTC1444 compared to other variants?
The LTC1444 features open-drain outputs, whereas the LTC1443 and LTC1445 provide CMOS outputs that can source up to 40mA.
