we are working ADAS3022EDZ Eval board to communicate SPI through Arduino board. please help me
As previously requested we will need additional information regarding how you've modified the evaluation board to connect your controller, the code you are currently using and any physical result data you can share to help us diagnose you problem.
As you are using the internal reference have you verified that the REFIN and REF voltages are powered up and fully settled to their specified values?
In fact could you please check that all supply rails are correctly powered? This will ensure we're not fighting a supply issue. I'll go back and look at the code snippet and waveforms you provided earlier to see if I can't come up with additional suggestions.
Did you intend to use the device in the four-(4) differential pair configuration or were you expecting to read channels 0 -7 with respect to COM? If it's the latter you'll want to modify your configuration word to set CFG to 1'b1.
Please also share how you are validating the results of the ADC with respect to your applied input voltage. Please note the inputs must be driven and cannot float.
This the wave form.
0xF7FE/0x843 0x00/0x847 0x00/0x2407 0x00/0x23E8 0x00/0x1A0F
0xF7FE/0x846 0x00/0x846 0x00/0x2409 0x00/0x23E9 0x00/0x1A14
0xF7FE/0x845 0x00/0x846 0x00/0x2406 0x00/0x23E8 0x00/0x1A1A
0xF7FE/0x846 0x00/0x846 0x00/0x2405 0x00/0x23E8 0x00/0x1A1F
0xF7FE/0x844 0x00/0x843 0x00/0x2402 0x00/0x23E8 0x00/0x1A26
0xF7FE/0x846 0x00/0x847 0x00/0x2407 0x00/0x23E8 0x00/0x1A2A
0xF7FE/0x845 0x00/0x845 0x00/0x2405 0x00/0x23E8 0x00/0x1A2F
0xF7FE/0x845 0x00/0x844 0x00/0x2403 0x00/0x23E8 0x00/0x1A35
0xF7FE/0x845 0x00/0x844 0x00/0x2405 0x00/0x23E8 0x00/0x1A3B
0xF7FE/0x844 0x00/0x844 0x00/0x2402 0x00/0x23E7 0x00/0x1A41