ZHCSK28E April 2003 – July 2019 PCM1753 , PCM1754 , PCM1755
PRODUCTION DATA.
The SNR test provides a measure of the noise floor of the D/A converter. The input to the D/A is all-0s data, and the dither function of the digital generator must be disabled to ensure an all-0s data stream at the input of the D/A converter.
The measurement setup for SNR is identical to that used for dynamic range, with the exception of the input signal level.
(See the note provided in Figure 34).
Figure 34. Test Setup for Dynamic Range and SNR Measurement