4- to 20-mA Loop-Powered RTD Temperature Transmitter Reference Design With MSP430 Smart Analog Combo
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) ProbesTemperature range for RTD of –200 °C to 850 °CMaximum Measured Error: IEC61000-4-2: ESD: Air Discharge: ±8 kV Class ASmall Form Factor (L × W): 60mm × 8mmOperating Temperature Range -40 °C to 105 °C
Applications
- Temperature transmitter
- Process analytics
- Level transmitter
- Position sensor
- Proximity switch
- Force & torque sensor
- Flow transmitter
- Pressure transmitter
Product Categories
- MSP430 microcontrollers