CM6571 Datasheet, PDF (51/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
Audio Precision
-65
-70
-75
-80
-85
d
B
-90
r
-95
A
-100
-105
-110
-115
-120
20
50
100
200
500
1k
2k
Hz
Sweep Trace Color Line Style Thick Data
Axis Com m ent
1
1
Cyan Solid
2
Anlr.THD+N Am pl Left
1
2
Yellow Solid
2
Anlr.THD+N Am pl Left
Vis ta-D-A THD+N.at27
12/08/11 16:33:29
5k
10k
20k
Audio Precision
dx=-19.980 kHz
+1
+0.5
+0.11+60
dy=-1.015 dB
12/08/11 16:35:53
-0.5
d
B
r ^-0.899-1
A
-1.5
-2
-2.5
-3
19.290995
50
100
200
500
1k
2k
Hz
5k
10k 1290.9k997k
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Cyan Solid
2
Anlr.Ampl Left
1
2
Yellow Solid
2
Anlr.Ampl Left
Curs or1
Curs or2
*-0.899 dBr *+0.116 dBr
-0.917 dBr A +0.099 dBr A
Vista-D-A FR+PR.at27
FIGURE 1. 48K/16BIT, 10K LOADING DAC, THD+N
FIGURE 2. 48K/16BIT, 10K LOADING DAC, FREQUENCY RESPONSE
Audio Precision
dx=-4.0000 kHz
+1
+0.5
+0.0+50
-0.231
-0.5
d
B
r
-1
A
-1.5
-2
dy=-0.281 dB
12/08/11 16:42:33 Audio Precision
+0
-20
-40
d
-60
B
-80
-100
12/08/11 16:38:27
-2.5
-3
20
50
100
200
500
1k
2k 2.99996k 5k6.99992k10k 20k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Cyan Solid
2
Anlr.Ampl Left
1
2
Yellow Solid
2
Anlr.Ampl Left
Curs or1
Curs or2
*+0.050 dBr *-0.231 dBr
+0.032 dBr A -0.249 dBr A
Vista-D-A FR+PR.at27
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Cyan Solid
2
Anlr.Crosstalk Left
Vista-D-A Crosstalk-R.at27
10k 20k
FIGURE 3. 48K/16BIT, 10K LOADING DAC, PASSBAND RIPPLE
FIGURE 4. 48K/16BIT, 10K LOADING DAC, CROSSTALK L
Revised: Nov. 2012
Page 51 / 63
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