CM6571 Datasheet, PDF (57/63 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 18:05:51 Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 15:11:46
+0
-20
-40
d
B
-60
F
S
-80
-100
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Ampl A Left
Vista-A-D Crosstalk_L.at27
10k 20k
+0
-20
-40
d
B
-60
F
S
-80
-100
-120
20
50
100
200
500
1k
2k
5k
10k 20k
Hz
Sweep Trace Color
Line Style Thick Data
Axis Comment
1
1
Red
Solid
1
DSP Anlr.THD+N Ampl A Left
1
2
Magenta Solid
1
DSP Anlr.THD+N Ampl B Left
Vista-A-D THD+N.at2c
FIGURE 17. 48K/16BIT, MICROPHONE IN, CHANNEL SEPARATION L
FIGURE 18. 48K/16BIT, LINE IN, THD+N
Audio Precision
A-D FREQUENCY RESPONSE
+0.02+90
-0.13
-0.5
dx=-2.8850 kHz
dy=-0.159 dB
d
-1
B
F
-1.5
S
-2
05/04/12 10:55:03 Audio Precision
A-D FREQUENCY RESPONSE
+0
-0.313
-0.5
-0.695
d
-1
B
F
-1.5
S
-2
dx=-19.979 kHz
dy=+0.382 dB
05/04/12 10:55:03
-2.5
-2.5
-3
20
50
100
200
500
1k
2k
5k 9.611027k.55k0252k0k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Cyan Solid
2
DSP Anlr.Level A Left
1
2
Yellow Solid
2
DSP Anlr.Level B Left
Vista-A-D Frequency Response.at2c
-3
202.055
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Cyan Solid
2
DSP Anlr.Level A Left
1
2
Yellow Solid
2
DSP Anlr.Level B Left
Vista-A-D Frequency Response.at2c
10k 202k0k
FIGURE 19. 48K/16BIT, LINE IN, PASSBAND RIPPLE
FIGURE 20. 48K/16BIT, LINE IN, FREQUENCY RESPONSE
Revised: Nov. 2012
Page 57 / 63
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