Cirrus-logic AN339 Manuel d'utilisateur télécharger pdf (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)

96 kHz 111.01

(Figure 6)

45.278

(Figure 8)

212.35

(Figure 10)

192 kHz - - 215.43

(Figure 11)

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

1 2 3 4 5 6 7 8 9 10 11 12

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Cirrus-logic AN339 Manuel d'utilisateur Page 4

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