I 'm testing Eval-ad7982-pmdz and comparing THD results with Eval-7984-pmdz.
In contrast to charts provided in datasheets, adc7982 shows worse results in exactly the same test conditions.
Difference is more than 10 dBc with 2 kHz sine signal.
AD7984 = -115 dBc
AD7982 = - 105/ 108
What I discovered, logo printed on IC is different. Since EVAL-ad7984 I bought 2 years ago, my question is:
-Does AD change logo in the last 2 years?