摘要：
New generations of motor control digital signal processors (DSPs) lower their supply voltages from 5V to 3.3V to offer higher performance at lower cost. Replacing traditional 5V digital control circuitry by 3.3V designs introduce no additional system cost and no significant complication in interfacing with TTL and CMOS compatible components, as well as with mixed voltage ICs such as power transistor gate drivers. Just like 5V based designs, good engineering practice should be exercised to minimize noise and EMI effects by proper component layout and PCB design when 3.3V DSP, ADC, and digital circuitry are used in a mixed signal environment, with high and low voltage analog and switching signals, such as a motor control system. In addition, software techniques such as Random PWM method can be used by special features of the Texas Instruments (TI)(tm) TMS320x24xx DSP controllers to significantly reduce noise effects caused by EMI radiation. This application report reviews designs of 3.3V DSP versus 5V DSP for low HP motor control applications. The application report first describes a scenario of a 3.3V-only motor controller indicating that for most applications, no significant issue of interfacing between 3.3V and 5V exists. Cost-effective 3.3V-5V interfacing techniques are then discussed for the situations where such interfacing is needed. On-chip 3.3V analog-to-digital converter (ADC) versus 5V ADC is also discussed. Sensitivity and noise effects in 3.3V and 5V ADC conversions are addressed. Guidelines for component layout and printed circuit board (PCB) design that can reduce system?s noise and EMI effects are summarized in the last section.
文档：spra550.pdf
链接：http://www.ti.com.cn/general/cn/docs/litabsmultiplefilelist.tsp?literatureNumber=spra550
| 打赏帖 | |
|---|---|
| 汽车电子中巡航控制系统的使用被打赏10分 | |
| 分享汽车电子中巡航控制系统知识被打赏10分 | |
| 分享安全气囊系统的检修注意事项被打赏10分 | |
| 分享电子控制安全气囊计算机知识点被打赏10分 | |
| 【分享开发笔记，赚取电动螺丝刀】【OZONE】使用方法总结被打赏20分 | |
| 【分享开发笔记，赚取电动螺丝刀】【S32K314】芯片启动流程分析被打赏40分 | |
| 【分享开发笔记，赚取电动螺丝刀】【S32K146】S32DS RTD 驱动环境搭建被打赏12分 | |
| 【分享开发笔记，赚取电动螺丝刀】【IAR】libc标注库time相关库函数使用被打赏23分 | |
| LP‑MSPM0L1306开发版试用结果被打赏10分 | |
| 【分享开发笔记，赚取电动螺丝刀】【LP-MSPM0L1306】适配 RT-Thread Nano被打赏23分 | |
STM32
MCU
通讯及无线技术
物联网技术
电子DIY
板卡试用
基础知识
软件与操作系统
我爱生活
小e食堂
