4- to 20-mA Loop-Powered RTD Temperature Transmitter Reference Design With MSP430 Smart Analog Combo
TIDM-01000
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- 4- to 20-mA Loop-Powered RTD Temperature Transmitter Reference Design
(PDF 11116 KB)
21 May 2018
Description
This TI reference design provides a low-component count, low-cost solution for 4- to 20-mA loop-powered, resistance-temperature detector (RTD), temperature transmitter. The design takes advantage of the on-chip Smart Analog Combo module in the MSP430FR2355 MCU to control the loop current, so the standalone DAC is no longer required. This design achieves a 12-bit output resolution with an output current resolution of 6 µA. The design incorporates reverse-polarity protection as well as IEC61000-4-2 and IEC61000-4-4 protection on the loop-power input.
Features
- Sensor Input Compatible with 2-, 3- or 4-Wire Resistance Temperature Detector (RTD) Probes
- Temperature range for RTD of –200°C to 850°C
- Maximum Measured Error: <1°C
- IEC61000-4-2: ESD: Air Discharge: ±8 kV Class A
- Small Form Factor (L × W): 60mm × 8mm
- Operating Temperature Range -40°C to 105°C
See the Important Notice and Disclaimer covering reference designs and other TI resources.
