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Product Detailed Parameters
- Description：IC COMPARATOR 4 W/VOLT REF 16SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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：0°C ~ 70°C
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：16-SO
- Grade：-
- Qualification：-
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Overview
The LTC1444CS#TRPBF is an ultralow power quad comparator with a built-in reference, manufactured by Analog Devices Inc. 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 an internal 1.221V ±1% reference. Outputs are open-drain for the LTC1444, capable of sinking current. Hysteresis is programmable via the HYST pin using two resistors. Input common mode range extends from the negative supply to within 1.3V of the positive supply.
Feature Summary
- Ultralow quiescent current consumption
- Built-in voltage reference output
- Programmable hysteresis capability
- Wide supply voltage range operation
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing this component. Confirm the CS suffix indicates the commercial temperature grade (0°C to 70°C) and SOIC package type. Ensure compatibility with the required operating environment before procurement.
Selection Notes
Select the LTC1444 variant specifically for its open-drain output configuration, which differs from the push-pull outputs of the LTC1443 and LTC1445. Consider the programmable hysteresis feature if noise immunity is required in the application design without external components.
Part Context
This component belongs to the LTC1443/LTC1444/LTC1445 family of micropower comparators. These devices share similar pinouts and core functionality but differ in output stage topology and reference voltage precision. The family is designed for battery-powered applications requiring minimal power draw.
Replacement Considerations
LTC1443CN#TRPBF and LTC1445CN#TRPBF are pin-compatible upgrades. Note that these alternatives have different output types (push-pull vs open-drain) and may require circuit adjustments.
FAQ
What is the output type of the LTC1444 compared to other family members?
The LTC1444 features open-drain outputs, whereas the LTC1443 and LTC1445 have CMOS/TTL compatible push-pull outputs.
How is hysteresis configured on the LTC1444?
Hysteresis is programmed using two resistors connected between the REF and HYST pins, allowing adjustment of the threshold voltage band.
