CM6571 Datasheet, PDF (60/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 15:14:43 ^{Audio Precision}
A-D THD+N vs FREQUENCY
05/04/12 15:15:25
+0
+0
-20
-20
-40
d
B
-60
F
S
-80
-40
d
B
-60
F
S
-80
-100
-100
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Red Solid
1
DSP Anlr.Ampl B Left
Vista-A-D Crosstalk_R.at27
10k 20k
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Red Solid
1
DSP Anlr.Ampl A Left
Vista-A-D Crosstalk_L.at27
10k 20k
FIGURE 29. 96K/24BIT, LINE IN, CHANNEL SEPARATION R
FIGURE 30. 96K/24BIT, LINE IN, CHANNEL SEPARATION L
10.5.3 A-A path audio quality
TA=25℃, DV50=5V, AV50=5V
Items
Full-scale Output Voltage
Test Conditions
Microphone to Line out
Min.
Test Values
Typ.
Max.
1.09
Unit
Vrms
THD+N @ Vout=-3dB
Microphone to Line out
fs=48kHz/16bits,A-Weighted
-80
-80
-81
dB
Dynamic Range with Signal Present
Microphone to Line out
fs=48kHz/16bits,A-Weighted
92
dB
Channel Separation
Microphone to Line out
fs=48kHz/16bits,A-Weighted
74
104
119
dB
Frequency Response
Microphone to Line out
fs=48kHz/16bits,A-Weighted
-0.194
+0.484
dB
Passband Ripple
Microphone
fs=48kHz/16bits,A-Weighted
0.1
dB
Revised: Nov. 2012
Page 60 / 63
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