Freescale MK30X256 MCU单相电表参考设计
Freescale公司的Kinetis KM3x MCU是基于低功耗ARM Cortex－M0+核的MCU,专门设计用于单相和三相电表,水表和气表以及其它精密测量应用.器件包括由多个24位Sigma－Delta ADC,可编增益放大器,低温度飘移的基准电压和相移比较器等组成的模拟前端(AFE),以及多种安全特性,主要用在智能电表,水表,气表,倾斜测量,工业流体测量和控制,精密距离测量系统以及网络和测试测量.本文介绍了Kinetis KM3x MCU主要特性,框图,以及单相电表参考设计RDKM3METERING1PH主要特性,框图,电路图,材料清单和PCB元件布局外形图.
Kinetis KM3x MCUs are based upon the low-power ARM® Cortex®-M0+ core and are designed for single-chip one-two- and three -phase electricity meters, as well as flow meter and other precision measurement applications. Kinetis KM3x MCUs include a powerful analog front end consisting of multiple 24-bit sigma delta ADCs, programmable gain amplifiers, voltage reference with low drift over temperature and a phase shift compensator. A large range of security features including a memory protection unit, external tamper detection pins, iRTC with tamper detect and a random number generator provide protection of supplier/user data within the MCU and from the MCU to the power grid. A low-power segment LCD controller support up to 288 segments and eight backplanes.
MK30X256主要特性:
• Operating Characteristics..
