CM6571 Datasheet, PDF (49/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
10.5 Audio performance
10.5.1 DAC audio quality
TA=25℃, DV50=5V, AV50=5V
Items
Test Conditions
Full-scale Output Voltage
THD+N @ Vout=-3dB
Dynamic Range with Signal Present
Noise Level during System Activity
10KΩ loading
fs=48kHz
32Ω loading
fs=48kHz
10KΩ loading
fs=48kHz/16bits,A-Weighted
10KΩ loading
fs=96kHz/24bits, A-Weighted
32Ω loading
fs=48kHz/16bits,A-Weighted
32Ω loading
fs=96kHz/24bits,A-Weighted
10KΩ loading
fs=48kHz/16bits,A-Weighted
10KΩ loading
fs=96kHz/24bits, A-Weighted
32Ω loading
fs=48kHz/16bits,A-Weighted
32Ω loading
fs=96kHz/24bits,A-Weighted
10KΩ loading
fs=48kHz/16bits,A-Weighted
10KΩ loading
fs=96kHz/24bits, A-Weighted
32Ω loading
fs=48kHz/16bits,A-Weighted
32Ω loading
fs=96kHz/24bits,A-Weighted
Min.
Test Values
Typ.
Max.
0.95
0.82
-78
-82dB
-93
-79
-82dB
-94
-67
-82dB
-92
-67
-82dB
-95
91
94
92
94
94
96
96
94
Unit
Vrms
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Inter-Channel Phase Delay
100Hz ~ 20kHz
+0.02
+1.05
Deg
Sampling Frequency Accuracy
10KΩ loading
fs=48kHz/16bits,A-Weighted
-0.0043
+0.0015
%
Revised: Nov. 2012
Page 49 / 63
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