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AWRL1432BOOST: 请问GPADC sampling time是什么含义

zhiyong wang
Prodigy 245 points
Part Number: AWRL1432BOOST

SWRS296A 文档中给出了GPADC的 sampling time为 300ns

假设 XTAL clock的时钟为40MHz，那么 采集一个sample的周期是1.203us， 那么ADC sampling time = 300ns是指哪部分时间？

ADC sampling time= 300ns，是否包含在  collect sample period之中？

  • 0
    TI__Expert 4000 points

    感谢您对TI产品的关注！
    关于你的咨询， 请参考下面的解释说明。

    The ADC sampling time is determined by two parameters in the chirpComnCfg: DigOutputSampRate and NumOfAdcSamples.
    This can be calculated by taking the number of ADC samples and dividing by the sampling rate.
    Note: the DigOutputSampRate specifies the decimator to be used to determine the sampling rate (sampling rate = 100 MHz/DigOutputSampRate).
    For example, if DigOutputSampRate = 32 (Sampling Rate = 3.125 MHz) and NumOfAdcSamples = 128, then the sampling time is 40.96 ns (128/3.125 MHz).

  • 0 回复 FRANK1
    Prodigy 245 points

    感觉像是GPADC内部的 SARADC sampling 模拟信号的时间~