This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADC3244: The values of 8-point sine-wave of ADC3244 are different from the DataSheet's values.

Expert 4445 points
Part Number: ADC3244

Hello Team

There is following mention in ADC3244's DataSheet Page61.

CHA TEST PATTERN
1001 = 8-point sine-wave: data are a repetitive sequence of the
following eight numbers that form a sine-wave:
0, 2399, 8192, 13984,16383, 13984, 8192, 2399.
(Offset binary:
0000, 095F, 2000, 36A0, 3FFF, 36A0, 2000, 095F )


However, real 8-point sine-wave are the following values.

The format is setting of register 09h (the digital output data format).

Output data format=0 (2's compl.)
0000, 0f4b, 15a1, 0f4b, 0000, 30b4, 2a5e, 30b4, ...

Output data format=1 (Offset binary)
0a5e, 10b4, 2000, 2f4b, 35a1, 2f4b, 2000, 10b4, ...


I think that the values of DataSheet are a mistake,
and the real values mentioned above are correct.


Best regards,
Keishi,Nishijima
Japan CSC