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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 LTC1842CS8#PBF is an ultralow power dual comparator with a built-in 1.182V reference, housed in an 8-lead plastic SO package. It operates from a single 2.5V to 11V supply or a dual ±1.25V to ±5.5V supply. The device features a typical quiescent 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. Hysteresis is programmable via external resistors connected to the HYST pin.
Feature Summary
- Incorporates a built-in 1.182V bandgap reference output
- Features adjustable hysteresis controlled by external resistors
- Open-drain outputs eliminate cross-conduction current spikes during logic state changes
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify that the component matches the specific Analog Devices Inc. part number LTC1842CS8#PBF. Confirm the presence of the integrated reference and the 8-lead SOIC package. Ensure the ordering suffix corresponds to the commercial temperature grade (0°C to 70°C) as indicated by the 'C' designation. Cross-reference datasheet specifications against received inventory to validate authenticity.
Selection Notes
Select this component when ultralow quiescent current is critical for battery life. The LTC1842CS8#PBF is suitable for applications requiring a stable internal reference without external components. Choose this model over the LTC1841 if programmable hysteresis and a fixed reference are required. Verify that the input signal range remains within the specified common-mode limits relative to the supply rails.
Part Context
This device belongs to the LTC1841/LTC1842/LTC1843 family of micropower comparators. While the LTC1841 lacks a reference and the LTC1843 has inverted inputs for Comparator B, the LTC1842 provides noninverting inputs for both channels alongside the integrated reference. All variants share the same low-power architecture and 8-lead SO package form factor.
Replacement Considerations
LTC1841CS8#PBF
FAQ
How is hysteresis programmed on the LTC1842?
Hysteresis is set using two external resistors connected between the REF pin, the HYST pin, and the V– pin.
What is the maximum bypass capacitance for the reference output?
The reference output can drive a bypass capacitor of up to 0.01μF directly without oscillation.
