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Product Detailed Parameters
- Description：IC AMP COMP REF 8DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Amplifier, Comparator, Reference
- Applications：GSM
- Mounting Type：Surface Mount
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LTC1542CDD#PBF is a micropower analog comparator housed in an 8-lead DFN package. It operates from a single supply voltage ranging from 2.5V to 12.6V, with a typical quiescent current of 5µA. The device features a CMOS output capable of driving TTL and CMOS loads, with a propagation delay of 8µs at 100mV overdrive. Input common mode range extends from the negative rail to within 1.3V of the positive rail.
Feature Summary
- Features internal hysteresis for clean switching on slow-moving signals
- CMOS output stage supports rail-to-rail swing
- Input common mode range includes ground potential
Applications
- Battery-powered systems
- Automotive keyless entry
- Low frequency local area alarms or detectors
- Infrared receivers for remote controls
- Smoke detectors and safety sensors
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the DD package designation matches the required 3mm x 3mm footprint. Ensure the commercial grade temperature specifications align with the operational environment requirements before finalizing procurement.
Selection Notes
Select this component for applications requiring low power consumption and high input impedance. The internal hysteresis eliminates the need for external feedback components in many threshold detection scenarios. Verify that the load capacitance does not exceed stability limits without additional damping measures.
Part Context
This part belongs to the LTC1541/LTC1542 family of micropower amplifiers and comparators. The LTC1542 variant specifically provides a dedicated comparator input rather than an internal reference connection found in the LTC1541. Both share identical pinouts and electrical characteristics except for the comparator's inverting input configuration.
Replacement Considerations
LTC1542CDD-1#PBF
FAQ
How does the LTC1542 handle inputs below the negative supply?
Inputs can be taken more than 300mV below the negative supply without damage, provided the current out of the pin is limited to less than 1mA.
What is the purpose of the internal hysteresis?
The internal ±2.25mV hysteresis ensures clean output switching even when processing slow-moving input signals.
