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Product Detailed Parameters
- Description：IC COMPARATOR 2 W/VOLT REF 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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：-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 LTC1843IS8#TRPBF 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 dual ±1.25V to ±5.5V supply. The device features a typical supply current of 3.5μA and a maximum of 5.7μA over temperature. Input voltage range extends from the negative supply to within 1.3V of the positive supply. Open-drain outputs can typically sink greater than 20mA. Propagation delay is 12μs with 10mV overdrive. Hysteresis is programmable via external resistors connected to the HYST pin.
Feature Summary
- Built-in 1.182V reference output capable of driving up to 0.01μF bypass capacitor without oscillation
- Programmable hysteresis using two external resistors connected to the HYST pin
- Open-drain outputs that eliminate cross-conduction current spikes during logic state changes
- Input common mode range includes the negative supply rail
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm the manufacturer designation matches Analog Devices Inc. for the LTC1843 series. Ensure the package type corresponds to the 8-lead plastic small outline (SO) format. Check RoHS compliance status against current regulatory requirements before finalizing procurement orders.
Selection Notes
Select this component when ultralow quiescent current is critical for battery life extension. Choose the LTC1843 over the LTC1841 if an integrated voltage reference is required. Use the LTC1843 instead of the LTC1842 if the inverting input configuration for Comparator B is preferred. Ensure the supply voltage meets the minimum 2.5V requirement for the dual-supply variant operation.
Part Context
The LTC1843 belongs to the LTC1841/LTC1842/LTC1843 family of micropower comparators. It shares the same low-power architecture and open-drain output structure as its siblings. The primary distinction lies in the internal reference integration and the specific input pinout configuration for Comparator B compared to the LTC1842.
Replacement Considerations
LTC1842IS8#TRPBF offers identical electrical characteristics but utilizes a noninverting input for Comparator B instead of the inverting input found on the LTC1843.
