Hi mayur09 ,
In page 23 of the datasheet, you could see the suggested ADC configuration flow. In your setup, to be able to read single-ended on every channel, you could connect VINCOM to ground and select the inputs in the CHANNEL REGISTER with (VINx, VINCOM).
Then, you could configure the SETUP CONFIGURATION Register, Select filter and ODR. The input buffers must also be enabled when for VIN inputs for correct operation.
One thing to note, when multiple channels are enabled, you must set the DATA_STAT bit to 1 in the INTERFACE MODE REGISTER. This bit will enable the 8 bits STATUS REGISTER to be appended to the DATA REGISTER. This will indicate which channel the data corresponds to. Furthermore, the ADC automatically sequences to all enabled channels from Channel 0 to Channel 15, if a channel is disabled, it is skipped by the sequencer. In any of the operating modes, continuous conversion mode, continuous read mode, and single conversion mode in the ADC MODE REGISTER, the user must poll or read the RDY bit in the STATUS REGISTER and wait for it to go LOW indicating that the data is ready and available to read.
Hope this helps.
Regards,
JC
