This design features a single-chip solution to linearize and transmit a 3-wire PT1000 RTD over the industry standard 2-wire 4-20mA current loop. The design was configured for a -50°C to 250°C temperature range, but other temperature ranges can be achieved by adjusting the component values as discussed in the Theory of Operation section of the reference design guide. Unadjusted design accuracy was measured to be less than 0.15°C over the selected RTD temperature span.
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
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Analog 3-Wire PT1000 RTD to 2-Wire 4-20mA Current Loop Transmitter Design Guide | Nov. 09, 2015 |
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