Cdb42l55, Figure 21, Master volume (digital) headphone volume (analog) – Cirrus Logic CDB42L55 User Manual
Page 21
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DS773DB1
21
CDB42L55
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
r
A
-50
+0
-40
-30
-20
-10
dBr A
Figure 20. THD+N vs. Volume - Digital In to HP Out
Figure 21.
FFT - Digital In to HP Out @ 0 dBFS
Master Volume
(Digital)
Headphone Volume
(Analog)
-140
+0
-120
-100
-80
-60
-40
-20
d
B
r
A
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-140
+0
-120
-100
-80
-60
-40
-20
d
B
r
A
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
Figure 22. FFT - Digital In to HP Out @ -60 dBFS
Figure 23. FFT - Digital In to HP Out - no input
-140
+0
-120
-100
-80
-60
-40
-20
d
B
r
A
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-3
+3
-2
-1
+0
+1
+2
d
B
r
A
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-40
+40
-30
-20
-10
+0
+10
+20
+30
d
B
r
A
-125
+0
-100
-75
-50
-25
dBFS
Figure 24. Freq. Response - Digital In to HP Out
Figure 25. Fade-to-Noise Linearity- Digital In to HP Out
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