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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：-40°C ~ 85°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
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Overview
The LTC1440IS8#TRPBF is an ultralow power single 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 a typical supply current of 2.1µA and includes a 1.182V ±1% reference output capable of driving a 0.01µF capacitor. It offers programmable hysteresis via the HYST pin, TTL/CMOS compatible outputs that can source up to 40mA, and propagation delays of 12µs with 10mV overdrive. The component is housed in an 8-lead MSOP package.
Feature Summary
- Ultralow quiescent current consumption for battery-powered applications
- Built-in 1.182V reference output drives bypass capacitors without oscillation
- Programmable hysteresis using external resistors connected to the HYST pin
- Glitch-free CMOS output stage eliminates crowbar switching currents
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging and lead-free compliance when ordering. Confirm the IS8 designation corresponds to the industrial temperature range (-40°C to +85°C) and the MSOP-8 package type. Ensure compatibility with existing PCB footprints for the 8-lead plastic MSOP form factor before procurement.
Selection Notes
Select this component for designs requiring minimal static power draw while maintaining precise voltage threshold detection. The integrated reference simplifies circuit design by removing the need for external voltage references. Consider the programmable hysteresis feature to enhance noise immunity in signal conditioning paths where input signals may exhibit slow transitions or high-frequency interference.
Part Context
This part belongs to the LTC1440/LTC1441/LTC1442 family of micropower comparators. While the LTC1440 provides a single comparator with a reference, the LTC1441 offers dual comparators without a reference, and the LTC1442 provides dual comparators with a reference. All variants share similar electrical characteristics and package options, facilitating pin-compatible upgrades for legacy parts like the MAX921.
Replacement Considerations
The ISL21440 is documented as a pin-compatible performance upgrade for the LTC1440 series. Verify functional equivalence regarding supply voltage ranges and output drive capabilities when substituting.
