ADI ADuCM36324位数据采集系统解决方案

ADI公司的ADuCM362/3是集成单通道Σ-Δ型ADC和ARM Cortex-M3的低功耗精密模拟微控制器,在单芯片上集成了双核高性能多通道Σ-Δ型模数转换器(ADC),32位ARM Cortex™-M3处理器和Flash/EE存储器,是完全集成的3.9 kSPS,24位数据采集系统.主要应用在工业自动化和过程控制,智能精密传感系统,4-20mA 回路智能传感器系统以及医疗设备,病人监护.本文介绍了ADuCM362/3主要特性,ADuCM362和ADuCM363功能框图,典型系统配置图以及评估板EVAL-ADuCM360QSPZ主要特性,电路图和PCB设计图.

The ADuCM362/ADuCM363 are fully integrated, 3.9 kSPS, 24-bit data acquisition systems that incorporate dual, high performance, multichannel sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a 32-bit ARM Cortex™-M3 processor, and Flash/EE memory on a single chip. The ADuCM362/ ADuCM363 are designed for direct interfacing to external precision sensors in both wired and battery-powered applications. The ADuCM363 contains all the features of the ADuCM362, except that only one 24-bit Σ-Δ ADC (ADC1) is available. The ADuCM362/ADuCM363 contain an on-chip 32 kHz oscillator and an internal 16 MHz high frequency oscillator. The high frequency oscillator is routed through a programmable clock divider from which the operating frequency of the processor core clock is generated. The maximum core clock speed is 16 MHz; this speed is not limited by operating voltage or temperature. The microcontroller core is a low power ARM Cortex-M3 processor, a 32-bit RISC machine that offers up to 20 MIPS peak performance. The Cortex-M3 processor incorporates a flexible, 11-channel DMA controller that supports all wired communica- tion peripherals (both SPIs, both UARTs, and I2C). Also integrated on chip are up to 256 kB of nonvolatile Flash/EE memory and 24 kB of SRAM. The analog subsystem 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, diagnostic current sources, and ...