CS42L51 Datasheet, PDF (72/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
7. ANALOG PERFORMANCE PLOTS
7.1 Headphone THD+N versus Output Power Plots
Test conditions (unless otherwise specified): Input test signal is a 997 Hz sine wave; measurement band-
width is 10 Hz to 20 kHz; Fs = 48 kHz. Plots were taken from the CDB42L51 using an Audio Precision an-
alyzer.
-10
-15 _{VA_HP = VA = 1.8 V}
-20
G = 0.6047
G = 0.7099
-25
G = 0.8399
-30
G = 1.0000
-35
G = 1.1430
-40
-45
Legend
-50
d
B
r
-55
A
-60
-65
-70
-75
NOTE: Graph shows the out-
put power per channel (i.e.
Output Power = 23 mW into
single 16 Ω and 46 mW into
stereo 16 Ω with THD+N = -
75 dB).
-80
-85
-90
-95
-100
0
10m
20m
30m
40m
50m
60m
70m
80m
W
Figure 28. THD+N vs. Ouput Power per Channel at 1.8 V (16 Ω load)
-10
-15 _{VA_HP = VA = 2.5 V}
-20
-25
G = 0.6047
G = 0.7099
G = 0.8399
-30
G = 1.0000
-35
G = 1.1430
-40
-45
Legend
-50
d
B
r
-55
A
-60
-65
-70
-75
NOTE: Graph shows the out-
put power per channel (i.e.
Output Power = 44 mW into
single 16 Ω and 88 mW into
stereo 16 Ω with THD+N = -
75 dB).
-80
-85
-90
-95
-100
0
10m
20m
30m
40m
50m
60m
70m
80m
W
Figure 29. THD+N vs. Ouput Power per Channel at 2.5 V (16 Ω load)
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