TMS320F28377DZWT(Input multiplexer with up to 16 channels (single-ended) or 8 channels (differential)),为什么ADC多路复用,单个信号输入只有16个,不是24个?
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TMS320F28377DZWT(Input multiplexer with up to 16 channels (single-ended) or 8 channels (differential)),为什么ADC多路复用,单个信号输入只有16个,不是24个?
“TMS320F28377DZWT(Input multiplexer with up to 16 channels (single-ended) or 8 channels (differential)),为什么ADC多路复用,单个信号输入只有16个,不是24个?”
ERIC:
Each ADC has the following features:
• Selectable resolution of 12 bits or 16 bits
• Ratiometric external reference set by VREFHI\VREFLO
• Differential signal conversions (16-bit mode only)
• Single-ended signal conversions (12-bit mode only)
• Input multiplexer with up to 16 channels (single-ended) or 8 channels (differential)
F28377内部有四个ADC模块,每个ADC都是基于SOC基值,每个ADC都有16个SOC,可以配置16个单端采样,但并非对应16个ADC输出接口,因为并非所有的ADC都有实际的16个输入口。比如说,ADCA只有6个输入口,ADCA0~A5, 加两个公用的ADCIN13, ADCIN14.
至于每个ADC有16个SOC采样,而实际的输入端口6个或8个,主要是因为以前的C2000ADC就是16个SOC,还有有些ADC输入口是内部信号,没有接到外面。
所有的ADC模块,加起来的实际ADC输入引脚,如果是ZWT封装,有24个。