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Product Detailed Parameters
- Description：IC COMPARATOR 2 W/VOLT REF 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：2
- Output Type：Open-Drain
- Voltage - Supply, Single/Dual (±)：2.5V ~ 11V, ±1.25V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：-
- Current - Quiescent (Max)：5.7µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：12µs
- 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 LTC1843CS8#PBF is an ultralow power dual comparator with a built-in 1.182V reference, housed in an 8-lead SOIC package. It operates from a single 2.5V to 11V supply or dual ±1.25V to ±5.5V supply. The device features a typical supply current of 3.5μA and open-drain outputs capable of sinking greater than 20mA. Input voltage range extends from the negative supply to within 1.3V of the positive supply. Propagation delay is 12μs with 10mV overdrive. The internal reference can drive up to 0.01μF without oscillation.
Feature Summary
- Built-in 1.182V reference output
- Programmable hysteresis via HYST pin
- Open-drain outputs sink >20mA
- Eliminates cross-conduction current spikes
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the CS8 designation matches the required 8-lead plastic SOIC narrow package dimensions. Ensure the operating temperature range aligns with commercial specifications (0°C to 70°C). Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision status before integration.
Selection Notes
Select this component for designs requiring minimal quiescent current and integrated reference functionality. The wide input common-mode range simplifies biasing near supply rails. Consider the open-drain output configuration for level shifting or wire-OR applications. Verify that the 1.182V reference accuracy meets system threshold requirements without external calibration.
Part Context
This device belongs to the LTC1841/LTC1842/LTC1843 family of micropower comparators. While the LTC1841 lacks a reference and the LTC1842 shares the reference but has different input configurations, the LTC1843 specifically provides the noninverting input for Comparator A and inverting input for Comparator B alongside the reference.
Replacement Considerations
LTC1842CS8#PBF
FAQ
Can the reference output drive capacitive loads?
Yes, the reference output can typically drive a bypass capacitor of up to 0.01μF without oscillation.
What is the maximum hysteresis voltage band?
The maximum voltage allowed between REF and HYST pins is 50mV, producing a maximum hysteresis voltage band of 100mV.
