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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SO
- 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)：12mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：-
- Current - Quiescent (Max)：710nA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：60µs
- 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 LTC1540IS8#PBF is a nanopower single comparator with an integrated 1.182V reference, housed in an 8-lead plastic SO package. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supplies. The device features ultralow quiescent current of 0.71µA maximum over the industrial temperature range (-40°C to +85°C). It includes programmable hysteresis via the HYST pin and TTL/CMOS compatible outputs capable of sourcing up to 40mA continuously. Propagation delay is typically 60µs with 10mV overdrive.
Feature Summary
- Integrated 1.182V bandgap reference output capable of driving capacitive loads without oscillation
- Programmable hysteresis using external resistors connected to the HYST pin
- Glitch-free CMOS output stage that eliminates crowbar switching currents during state transitions
- Wide input common-mode range extending from the negative supply to within 1.3V of the positive supply
Applications
- Battery-powered system monitoring and low-battery detection
- Threshold detectors for voltage level sensing
- Window comparators for signal range verification
- Oscillator circuits utilizing internal reference timing
Procurement Notes
Verify the specific suffix IS8 corresponds to the 8-lead Plastic SO package and Industrial temperature grade (-40°C to +85°C) required for your design. Confirm RoHS compliance status through official Analog Devices documentation prior to integration. Ensure supply voltage constraints between 2V and 11V align with your system architecture to maintain specified electrical characteristics.
Selection Notes
Select this component when ultra-low static power consumption is critical alongside precise threshold detection. The built-in reference simplifies design by removing external voltage sources. Consider the 40mA output drive capability if direct interfacing with logic gates or small loads is needed without additional buffering stages.
Part Context
This part belongs to the LTC1540 family of nanopower comparators manufactured by Analog Devices. It shares functional similarities with the LTC1440 but offers distinct performance metrics regarding quiescent current and reference accuracy. The IS8 variant specifically denotes the industrial temperature range extension compared to commercial grades.
Replacement Considerations
The datasheet identifies the LTC1440 as a related part within the product line. Verify pin compatibility and electrical parameter differences before substitution. No other specific substitute part numbers are confirmed in the provided documentation.
