PGA280: PGA280, PGA281 DAISY CHAIN

Hi Mason,

I'm not sure if the PGA280 supports daisy-chaining like a traditional SPI device (i.e. SDO of device 1 to SDI of device 2, etc.), however, using the Extended Chip Select mode for the GPIO pins, you can fan out the SPI bus to more devices. Figure 57 of the datasheet shows one application of this feature. Another way to accomplish this would be to use shift registers to generate the !CS signals for each PGA280, and share a common SDI, SDO, and SCLK.