ADI ADuC7027 工业过程控制PLC开发方案

ADI 公司的ADuC7027是集成了12位模拟I/O, ARM7TDMI® MCU的精密模拟微控制器,采用ARM7TDMI核16位/32位RISC架构,片内振荡器精度±3%,外接时钟源高达44MHz, 41.78 MHz PLL具有可编程分频器. 模拟I/O具有多路12位1MSPS ADC和12位电压输出DAC.器件工作电压2.7V-3.3V,主要用在工业控制和自动化系统,智能传感器,精密仪表,基站系统,光网络等.本文介绍了ADuC702x 主要特性,方框图,典型应用电路,以及PLC评估系统主要特性, 系统总体框图,多种输入/输出电路,输入和输出与电源保护电路.

The ADuC7019/20/21/22/24/25/26/27/28/29 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating high performance multichannel ADCs, 16-bit/32-bit MCUs, and Flash®/EE memory on a single chip.

The ADC consists of up to 12 single-ended inputs. An additional four inputs are available but are multiplexed with the four DAC output pins. The four DAC outputs are available only on certain models (ADuC7020, ADuC7026, ADuC7028, and ADuC7029). However, in many cases where the DAC outputs are not present, these pins can still be used as additional ADC inputs, giving a maximum of 16 ADC input channels. The ADC can operate in single-ended or differential input mode. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.
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