ADS8588S: Data transfer speed

Hello Naser,

ADS8588S supports the "Data Read during ongoing conversion". Please check the diagram.

The device also supports data readout in SPI mode using 2 SDO pins namely DOUTA and DOUTB.

Please note, you will be reading the conversion data for sample "n-1" when the device is converting sample "n".

It is important to read all the data before BUSY falls to logic state "low".

The time available to read = tCONV - tDZ_CNCS - tDZ_CSBSY = 3.7us - 10ns - 40ns = 3.65us

To read 8 channel data using 2 SDO pins, number of clocks required is 64

Hence clock period needed is 3.65us/64 = 57ns

This corresponds to SCLK freq = 17.5MHz

Thanks,

Shridhar.