ATMEGA2560 and ADS8568

Other Hardware Sensors
1

Hi

Has anyone been able to interface via SPI an ATMEGA2560 to an ADS8568 ?

In my current application, the ADS8568 is layout to operate in serial mode.
Until now I have been unsuccessful in getting readings back on the MISO line.

After looking at the spec sheet for ADS8568, it's timing requirements appear to be a lot more demanding than what the ATMEGA2560 can do.

For example this :
Care should be taken to ensure that the delay time of
the most significant bit (tDMSB) from the falling edge of FS/CS is met before applying the serial clock. This
delay is specified as 12 ns MAX

Since ATMEGA works at 16MHZ, its fastest instruction will be in 62nS!

Am I right in thinking the ATMEGA2560 will not be able to communicate via SPI to the ADS8568 ?

Any helps would be appreciated.

2

Are you using a raw chip or a breakout board or an evaluation board for the ADC? If it is a breakout/evaluation board, please post the picture and a link to it.

3

I’m using my own board.

The Atmega2560 is able to communicate with the ADC.

I had not configured to the reset pin on the ADC properly.