CM6571 Datasheet, PDF (56/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
Audio Precision
A-D THD+N vs FREQUENCY
12/19/11 14:55:26 Audio Precision
A-D FREQUENCY RESPONSE
12/19/11 14:57:33
+0
-20
-40
d
B
-60
F
S
-80
-100
dx=-19.979 kHz
+0
--00..44-83043.5
d
-1
B
F
-1.5
S
-2
dy=+0.051 dB
-120
20
50
100
200
500
1k
2k
5k
10k 20k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.THD+N Ampl A Left
1
2
Cyan Solid
1
DSP Anlr.THD+N Ampl B Left
Vista-A-D THD+N.at2c
-2.5
-3
202.055
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Level A Left
1
2
Cyan Solid
1
DSP Anlr.Level B Left
10k 202k0k
Vista-A-D Frequency Response.at2c
FIGURE 13. 48K/16BIT, MICROPHONE IN, THD+N
FIGURE 14. 48K/16BIT, MICROPHONE IN, FREQUENCY RESPONSE
Audio Precision
A-D FREQUENCY RESPONSE
12/19/11 14:57:33 Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 18:06:36
+0.05+80
-0.135
-0.5
dx=-2.6550 kHz
dy=-0.193 dB
d
-1
B
F
-1.5
S
-2
-2.5
-3
20
50
100
200
500
1k
2k
5k 10.10102k2.657k752k0k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Level A Left
1
2
Cyan Solid
1
DSP Anlr.Level B Left
Vista-A-D Frequency Response.at2c
+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 B Left
Vista-A-D Crosstalk_R.at27
10k 20k
5.2.1.1 PASSBAND RIPPLE 48K
FIGURE 15. 48K/16BIT, MICROPHONE IN, PASSBAND RIPPLE
FIGURE 16. 48K/16BIT, MICROPHONE IN, CHANNEL SEPARATION R
Revised: Nov. 2012
Page 56 / 63
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