This reference design implements a hardware interface based on the HEIDENHAIN EnDat 2.2 standard for position or rotary encoders. The building blocks include the power supply for the encoder with innovative smart eFuse technology and robust half-duplex RS-485 transceivers including line termination and EMC protection. An auxiliary power supply and logic level interface with adjustable I/O voltage level are provided to connect to subsequent MCUs and MPUs that would run the EnDat 2.2 master protocol stack. This design is fully tested to meet EMC immunity requirements for ESD, fast transient burst and surge according to IEC61800-3.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Tool for calculating critical component values required in the reference design
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Interface to EnDat 2.2 Position Encoder Design Guide | May 28, 2014 | |
| Technical article | Designing an EMC-compliant interface to motor position encoders – Part 6 | Nov. 20, 2015 | ||
| Technical article | Designing an EMC-compliant interface to motor position encoders – Part 3 | Sep. 14, 2015 |
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