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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：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#TRPBF 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 a 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. Propagation delay is specified at 12μs with 10mV overdrive. The input voltage range extends from the negative supply to within 1.3V of the positive supply.
Feature Summary
- Integrates a precise 1.182V internal bandgap reference output
- Features programmable hysteresis via external resistors connected to the HYST pin
- Open-drain outputs eliminate cross-conduction current spikes during logic state transitions
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify that the #TRPBF suffix indicates tape-and-reel packaging rather than tube packaging. Confirm the C-grade temperature rating aligns with the required operational environment. Ensure the specific ordering code matches the exact component requirements for the design.
Selection Notes
Select this component when low quiescent current is critical for battery life. The integrated reference simplifies circuit design by removing the need for external voltage references. Verify that the open-drain output configuration fits the downstream logic interface requirements.
Part Context
This part belongs to the LTC1841/LTC1842/LTC1843 family of micropower comparators. While the LTC1841 lacks a reference and the LTC1842 has different input configurations, the LTC1843 specifically includes the reference and utilizes the IN B– input configuration.
Replacement Considerations
LTC1841CS8#TRPBF
FAQ
Can the reference output drive large capacitive loads?
The reference can drive a bypass capacitor of up to 0.01μF without oscillation. Larger capacitance values require a series damping resistor.
What is the maximum hysteresis voltage band?
The maximum voltage allowed between the REF and HYST pins is 50mV, producing a maximum hysteresis voltage band of 100mV.
