Analog Linearized 3-Wire PT1000 RTD to 2-Wire 4-20mA Current Loop Transmitter Reference Design
Description
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.
Features
- Input: 3-Wire PT1000 RTDRTD Temperature Range: -50 °C to 250 °COutput: 2-Wire 4-20mA Current LoopIncludes analog RTD sensor linearization for >40x linearity improvement over end-point fitReference design includes theory: calculated error analysis: component selection: PCB layout: and measured results
Applications
- Lab & field Instrumentation
- Power analyzer
- Parametric measurement unit (PMU)
Product Categories
- Amplifiers
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Download the test file for TIPD202| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIPD202 BOM | 03 Dec 2015 | 203 | ||
| TIPD202 Schematic | 03 Dec 2015 | 210 |