CM6502B Datasheet, PDF (36/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
8.5 Audio Performance
8.5.1 DAC Audio Quality
TA=25℃, DV50=5V, AV50=5V
Items
Full scale output voltage
THD+N @ Vout=-3dB
Dynamic range with signal
present
Noise level during system
activity
Test Conditions
10KΩ loading
fs=48KHz
32Ω loading
fs=48KHz
10KΩ loading
fs=48KHz/16bits,A-Weighted
32Ω loading
fs=48KHz/16bits,A-Weighted
10KΩ loading
fs=48KHz/16bits,A-Weighted
32Ω loading
fs=48KHz/16bits,A-Weighted
10KΩ loading
fs=48KHz/16bits,A-Weighted
32Ω loading
fs=48KHz/16bits,A-Weighted
Test Values
Min Typ Max
0.95
0.82
-78
-93
-67
-92
91
92
94
96
Unit
Vrms
Vrms
dB
dB
dB
dB
dB
dB
Inter channel phase delay
100Hz ~ 20KHz
+0.02
+1.05 deg
Sampling frequency accuracy
Channel separation
Magnitud
e
Response
Frequency
Response
Passband Ripple
10KΩ loading
fs=48KHz/16bits,A-Weighted
10KΩ loading
fs=48KHz/16bits,A-Weighted
32Ω loading
fs=48KHz/16bits,A-Weighted
10KΩ loading
fs=48KHz/16bits,A-Weighted
10KΩ loading
fs=48KHz/16bits,A-Weighted
-0.0043
98
67
-0.085
+0.0015
%
119
dB
78
dB
-0.937 dB
0.291 dB
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