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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8MSOP
- 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)：680nA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：60µs
- Hysteresis：50mV
- Operating Temperature：0°C ~ 70°C
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-MSOP
- Grade：-
- Qualification：-
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Overview
The LTC1540CMS8#PBF is a nanopower comparator with an integrated 1.182V reference, housed in an 8-lead MSOP package. It operates on a single supply from 2V to 11V or dual supplies of ±1V to ±5.5V. The device features ultralow quiescent current of 0.3µA typical, TTL/CMOS compatible outputs capable of sourcing up to 40mA, and adjustable hysteresis via the HYST pin. Input common mode range extends from V– to V+ – 1.3V, with propagation delay at 60µs for 10mV overdrive.
Feature Summary
- Integrates a 1.182V bandgap reference output capable of driving bypass capacitors without oscillation
- Features programmable hysteresis controlled by external resistors connected to the HYST pin
- Provides CMOS logic outputs that source up to 40mA while eliminating crowbar switching currents
Applications
- Battery-powered system monitoring and low-battery detection
- Threshold detectors and window comparators
- Oscillator circuits and glitch-free level detectors
Procurement Notes
Verify the specific suffix CMS8 corresponds to the MSOP package and C-grade temperature range (0°C to 70°C). Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure input voltage limits are respected during design validation to prevent damage.
Selection Notes
Select this component for applications requiring minimal static power consumption alongside precise threshold detection. The built-in reference eliminates the need for external voltage references, simplifying circuit design. Consider the 60µs propagation delay when designing high-speed timing circuits.
Part Context
This part belongs to the LTC1540 family of nanopower comparators. It is pin-compatible with devices such as the LTC1440, MAX921, and MAX931, facilitating direct upgrades or replacements in existing designs. The MSOP package offers a compact footprint suitable for space-constrained portable electronics.
Replacement Considerations
LTC1440CS8#PBF
FAQ
How is hysteresis programmed on the LTC1540?
Hysteresis is set using two resistors connected between the REF and HYST pins and from HYST to V–. The maximum hysteresis voltage band is 100mV.
What is the input common mode voltage range?
The inputs operate from the negative supply (V–) to within 1.3V of the positive supply (V+).
