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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：1
- Output Type：CMOS, TTL
- Voltage - Supply, Single/Dual (±)：2V ~ 11V, ±1V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：40mA
- Current - Quiescent (Max)：4.4µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：15µs
- Hysteresis：50mV
- Operating Temperature：0°C ~ 70°C
- Package / Case：8-DIP (0.300", 7.62mm)
- Mounting Type：Through Hole
- Supplier Device Package：8-PDIP
- Grade：-
- Qualification：-
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Overview
The LTC1440CN8#PBF is a micropower single comparator with an integrated 1.182V reference, housed in an 8-lead PDIP package. It operates on a single supply from 2V to 11V or dual supplies of ±1V to ±5.5V. The device features a typical supply current of 2.1µA and a propagation delay of 12µs with 10mV overdrive. Its CMOS output stage can source up to 40mA continuously while sinking 5mA. The input common mode range extends from the negative supply to within 1.3V of the positive supply.
Feature Summary
- Integrated 1.182V bandgap reference capable of driving external bypass capacitors without oscillation
- Glitch-free CMOS output stage that eliminates cross-conducting currents during logic state transitions
- Wide input common mode range extending down to the negative supply rail
Applications
- Battery-powered system monitoring
- Micropower threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific suffix CN8 corresponds to the 8-lead PDIP package variant when sourcing. Confirm the #PBF designation ensures compliance with RoHS standards. Cross-reference the manufacturer part number against official Analog Devices documentation to ensure authenticity and correct pinout configuration for your PCB layout.
Selection Notes
Select this component for applications requiring low quiescent current and high output drive capability. The built-in reference simplifies circuit design by removing the need for external voltage references. Ensure the supply voltage remains above 2V to maintain guaranteed performance specifications and proper input common mode operation.
Part Context
This device belongs to the LTC1440/LTC1441/LTC1442 family of ultralow power comparators. While the LTC1441 lacks the reference and hysteresis pins, and the LTC1442 offers dual channels, the LTC1440 provides a single channel with programmable hysteresis via the HYST pin. All variants share similar electrical characteristics regarding speed and power consumption.
Replacement Considerations
The datasheet identifies the MAX921, MAX922, and MAX923 as pin-compatible upgrades. Verify that the replacement device meets the specific supply voltage and output drive requirements of the original design before substitution.
