EVAL-CN0221-EB1Z

EVAL-CN0221-EB1Z is a CN0221 circuit evaluation board. This circuit uses the ADuCM360/ADuCM361 precision analogue microcontroller in an accurate thermocouple temperature monitoring application. The ADuCM360/ADuCM361 integrates dual 24-bit sigma-delta (Σ-Δ) analogue-to-digital converters (ADCs), dual programmable current sources, a 12-bit digital-to-analogue converter (DAC), and a 1.2V internal reference, as well as an ARM Cortex-M3 core, 128kB flash, 8kB SRAM, and various digital peripherals such as UART, timers, SPIs, and I2C interfaces. In the circuit, the ADuCM360/ADuCM361 is connected to a thermocouple and a 100 ohm platinum resistance temperature detector (RTD). The RTD is used for cold junction compensation. In the source code, an ADC sampling rate of 4Hz is chosen. When the ADC input programmable gain amplifier (PGA) is configured for a gain of 32, the noise-free code resolution of the ADuCM360/ ADuCM361 is greater than 18 bits.