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ADC122s051 读取值异常

Other Parts Discussed in Thread: ADC122S051

您好:

  在调试ADC122s051的过程中发现一些问题,具体表述如下:

1.规格书中该芯片的采样率200k-500ksps,其对应的SPI时钟的最快和最慢速率是多少?

2.读取ADC寄存器发现读取的12bit的数据和外界施加的信号电压值刚好差一倍,将SPI的时钟速率降低至5Mhz和使用多块PCB情况是一样的。是不是哪里的设置没有满足?

3.关于ADC分辨率 1/2lsb该怎么理解?