Cirrus Logic CDB43L22, Руководство пользователя

Страница: 29 / 32

DS792DB1 29
CDB43L22
10.PERFORMANCE PLOTS
Test conditions (unless otherwise specified): Measurement bandwidth is 20 Hz to 20 kHz (unweighted);
VA=VD=VA_HP=1.8V; Sample Frequency = 48 kHz; HP test load: R
L
= 16
Ω.
-140
+0
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
-140
+0
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 19. FFT - S/PDIF Input to HP Output @ -1 dBFS Figure 20. FFT - S/PDIF Input to HP Output @ -60 dBFS
-95
+0
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
d
B
r
A
10m 100m 20m 30m 40m 50m 60m 70m 80m 90m
W
-3
+3
-2.75
-2.5
-2.25
-2
-1.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
-0
+0.25
+0.5
+0.75
+1
+1.25
+1.5
+1.75
+2
+2.25
+2.5
+2.75
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 21. THD+N vs. HP Output Power Figure 22. Freq. Resp. - S/PDIF Input to HP Output
1.1430
Gain
1.000
0.8399
0.7099
0.6047
*Note 2
-100
-40
-97.5
-95
-92.5
-90
-87.5
-85
-82.5
-80
-77.5
-75
-72.5
-70
-67.5
-65
-62.5
-60
-57.5
-55
-52.5
-50
-47.5
-45
-42.5
d
B
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
-120
-40
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 23. THD+N - S/PDIF Input to HP Output Figure 24. Dynamic Range- S/PDIF Input to HP Output