Cirrus Logic CDB42L55 - Manual (Page 21)

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