This application note describes the platinum RTD sensor and how to implement a complete RTD sensor interface using the Analog Devices MicroConverter product family.
This application note details how to implement a complete RTD sensor interface using the Analog Devices ADuC834 MicroConverter and a few passive components. It covers hardware design, signal conditioning, A/D conversion, linearization, and calibration methods for platinum RTD sensors.
| Temperature Range | -200°C to +850°C |
|---|---|
| Calibrated Accuracy | ±0.02°C or better |
| ADC Resolution | 16-bit or 24-bit |
| Microcontroller Core | 8052 MCU |
| Reference Resistor Value | 5.62 kΩ |
| RTD Nominal Resistance | 100 Ω at 0°C |
| ADC Gain Setting | 7.8125 |
| ADC0CON Value | 0x4C |
Platinum RTDs can measure temperature within the range –200°C to +850°C.
They are capable of achieving calibrated accuracy of ±0.02°C or better.
The application note describes using the ADuC834 (or other similar MicroConverter).