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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)：12mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：-
- Current - Quiescent (Max)：680nA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：60µs
- Hysteresis：50mV
- Operating Temperature：0°C ~ 70°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 LTC1540CS8#TRPBF is a nanopower comparator with an integrated reference, manufactured by Analog Devices Inc. It operates on a single 2V to 11V supply or dual ±1V to ±5.5V supplies. The device features ultralow quiescent current of 0.3µA typical and includes a 1.182V ±2% reference output capable of driving up to 0.01µF capacitors without oscillation. It offers adjustable hysteresis via the HYST pin, TTL/CMOS compatible outputs sourcing up to 40mA continuously, and propagation delay of 60µs with 10mV overdrive. Input common mode range extends from V– to V+ – 1.3V.
Feature Summary
- Ultralow power consumption with typical supply current of 0.3µA
- Integrated 1.182V reference output capable of driving bypass capacitors
- Programmable hysteresis using external resistors connected to the HYST pin
- Glitch-free CMOS output stage eliminating crowbar switching currents
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify that the #TRPBF suffix confirms tape and reel packaging for automated assembly. Confirm the CS8 designation matches the required 8-lead plastic SO package. Ensure the C-grade temperature range (0°C to 70°C) aligns with operational requirements. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and specifications.
Selection Notes
Select this component when ultra-low static current is critical for battery life. The built-in 1.182V reference simplifies design by removing external voltage references. Choose this part if the application requires high output drive capability (40mA) while maintaining nanoampere quiescent levels. Verify input common mode range compatibility with the specific signal voltages in the circuit.
Part Context
This component belongs to the LTC1540 family of nanopower comparators. It is pin-compatible with the LTC1440 and certain Maxim parts like the MAX921 and MAX931. The series is designed for space-constrained applications requiring minimal power draw. Other packages include DFN and MSOP variants within the same product line.
Replacement Considerations
The LTC1440 is a pin-compatible alternative within the same family. Check datasheet differences regarding reference accuracy and offset voltage before substitution.
