Customer question about the ad9650 power-down feature:
Hello. We have some questions with regards to the SPI interface and the PDWN pin of the AD9650. The datasheet makes it seem that the SPI interface needs to be off in order to use the PDWN pin but the PDWN pin always seems to respond in normal application. Which is the correct operation? Also, what exactly is the PDWN pin touching, it seems the SPI is untouched. Is there anyway to powerdown the SPI without power cycling the part or using a SPI reset? Thanks!