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描述 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.
特性- 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
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