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ADC采样率(HZ)是什么怎么计算
2022-07-07 21:47:00 【学无止境2022】
ADC转换就是输入模拟的信号量,单片机转换成数字量。读取数字量必须等转换完成后,完成一个通道的读取叫做采样周期。
采样周期一般来说=转换时间+读取时间。
而转换时间=采样时间+12.5个时钟周期。
采样时间是你通过寄存器告诉stm32采样模拟量的时间,设置越长越精确
公式:采样频率 = 1/采样周期
采样率指ADC每秒钟会进行多少次的模拟量转数字量的操作,如10K/s就是说ADC每秒钟,就采集了10K个模拟量,并将模拟量转换为数字量。 当采样声时,一般的采样率是44Kbps/s,当采样温度时,几K/s的采样率就够了。
ADC的时钟,是通过系统时钟 分频得来的 ++
ADC10每次采样转换的总时间是:采样时间+转换时间
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