Cirrus Logic AN339 - Manual (Page 4)

AN339
AN339REV1
4 AN339REV1
Each receiver, including both of the CS8416 phase detec-
tor update modes, was tested with input S/PDIF sample
rates at common values of 48 kHz and 96 kHz. Additional-
ly, the CS8416 was tested at 192 kHz with PDUR = 0.
The resulting baseband jitter measurement data is present-
ed in
Table 2 . Phase noise plots showing the measured jit-
ter signal on the receivers’ recovered clocks are displayed
in
Figures 5 through 11 . Refer to Section 9.2 for detailed
test set-up information and diagrams.
The highlighted portions of each plot denote the 100 Hz to 40 kHz bandwidth specified by the AES-12id-2006 base-
band jitter definition. As the definition suggests, the magnitude of the highlighted portion of the plots correlate to au-
dio-band converter THD+N performance. Thus, the lower the magnitude, the better the converter performance.
Sample
Rate
CS8414
-
CS8416
PDUR=1
CS8416
PDUR=0 Unit
48 kHz 158.5
( Figure 5 )
122.57
( Figure 7 )
531.41
( Figure 9 )
ps
96 kHz 111.01
( Figure 6 )
45.278
( Figure 8 )
212.35
( Figure 10 )
ps
192 kHz - - 215.43
( Figure 11 )
ps
Table 2. Baseband Jitter - Summary
Figure 5. CS8414 MCK Phase Noise
Fs = 48 kHz
Figure 6. CS8414 MCK Phase Noise
Fs = 96 kHz
Figure 7. CS8416 RMCK Phase Noise
Fs = 48 kHz, PDUR = 1
Figure 8. CS8416 RMCK Phase Noise
Fs = 96 kHz, PDUR = 1
Figure 9. CS8416 RMCK Phase Noise
Fs = 48 kHz, PDUR = 0
Figure 10. CS8416 RMCK Phase Noise
Fs = 96 kHz, PDUR = 0