ADI ADuCM360热电偶温度监测解决方案

ADI公司的ADuCM360是全集成的4kSPS 24位数据采集系统,集成了两个高性能多路Sigma-Delta (Σ-Δ) ADC,32位ARM Cortex M3®MCU和闪存/EE存储器,能直接双线和外接精密传感器接口,并采用电池供电.模拟输入/输出,单端和全差分输入,输入范围±6.64 mV 到±1.2 V,可编程ADC输出速率(4Hz到4kHz),可编程增益从1到128,RMS噪音为43nV @3.75Hz和180nV @ 50Hz,主要用于工业自动化和过程控制,智能的精密检测系统,4mA到20mA回路智能传感器系统,医疗设备和病人监护.本文介绍了ADuCM360主要特性,方框图,以及采用ADuCM360和外接热电偶的基于USB温度监测器特性,电路图和材料清单与PCB布局图.
The ADuCM360 is a fully integrated, 4 kSPS, 24-bit data acqui-sition system incorporating dual, high performance multi-channel sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), 32-bit ARM Cortex M3®MCU, and Flash/EE memory on a single chip. The part is designed for direct interfacing to external precision sensors in both wired and battery powered applications.
The ADuCM361 contains all the features of the ADuCM360 except the primary ADC, ADC0 is not available – only the auxiliary ADC, ADC1 is available.
The device contains an on-chip 32 KHz oscillator and an internal 16MHz high-frequency oscillator. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The maximum core clock speed is 16MHz and this is not limited by operating voltage or temperature.
The microcontroller core is a low power Cortex-M3 core from ARM. It is a 32-bit RISC machine, offering up to 20 MIPS peak performance. The Cortex-M3 MCU incorporates a flexible 11-channel DMA controller supporting all wired (SPI, UART, I2C) communication peripherals. 128k Bytes of non-volatile Flash/EE and 8k Bytes of SRAM are also integrated on-chip.
The Analog sub-system consists of dual ADCs each connected to a flexible input MUX. Both ADCs can operate in fully differential and single ended modes. Other on-chip ADC features include dual programmable excitation current sources, burn-out current source...