LTC1531 - Self-Powered Isolated Comparator
Features
OBSOLETE: For Information Purposes Only. Contact Linear Technology for Potential Replacement.
- UL Recognized File E151738 to UL1577
- Self-Powered Across Isolation Barrier
- 2500VRMS Isolation
- 2.5V Isolated Reference, ILOAD = 5mAMAX
- Zero-Cross Output for Line Power
- Dual Differential Input Comparator
- High Input Impedance Comparator
Typical Application
Description
OBSOLETE: For Information Purposes Only. Contact Linear Technology for Potential Replacement.The LTC1531 is an isolated self-powered dual differential comparator. An internal capacitive isolation barrier provides 2500VRMS of isolation between the comparator and its output. The part provides UL-rated isolated comparisons without the need for an isolated supply since both comparator power and output data are transmitted across the capacitive barrier. The comparator data is transferred differentially across the isolation barrier to provide high common mode voltage and noise immunity. The isolated side can supply a 2.5V reference output to power external sensor circuits such as a thermistor bridge. The dual differential comparator inputs allow for comparison of two differential voltages as well as single-ended voltages. The powered side provides a latched data output as well as a pulsed zero-cross comparator output for controlling a triac. The part is available in a 28-lead SO package.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
OBSOLETE: For Information Purposes Only. Contact Linear Technology for Potential Replacement.
- Self-Powered Isolated Sensing
- Isolated Temperature Control
- Isolated Voltage Monitor
- Isolated Switch Control
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.