This certified reference design implements a 12-bit loop-powered, or 2-wire, transmitter using DAC7311, OPA317 and TL431B. The design includes a protection circuit that provides immunity to the IEC61000-4 test suite. The design also includes a circuit to rectify a reverse polarity supply voltage. The protection circuit and rectifier do not negatively affect the current output performance, resulting in <0.2% total unadjusted error (TUE).
This design is applicable for industrial automation and process control applications requiring a low-cost solution for two-wire data transmission.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Download ready-to-use system files to speed your design process.
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed schematic diagram for design layout and components
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| User guide | Low-Cost Loop-Powered 4-mA to 20-mA Transmitter EMC/EMI Tested Design Guide | Apr 23, 2014 |
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