CM6571 Datasheet, PDF (54/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
10.5.2 ADC audio quality
TA=25℃, DV50=5V, AV50=5V, input test signal is 997Hz sine wave, measure bandwidth is 20Hz to 20kHz
Items
Test Conditions
Min.
Test Values
Typ.
Max.
Full-scale Output Voltage
Microphone
fs=48kHz
1.11
Line in
fs=48kHz
1.08
Microphone
fs=48kHz/16bits,A-Weighted
-81
-82
-89
THD+N @ Vout=-3dB
Microphone
fs=96kHz/24bits, A-Weighted
--82
-82
-91
Line in
fs=48kHz/16bits,A-Weighted
-82
-82
-90
Line in
fs=96kHz/24bits,A-Weighted
-82
-82
-90
Microphone
fs=48kHz/16bits,A-Weighted
90
Microphone
fs=96kHz/24bits, A-Weighted
91
Dynamic Range with Signal Present
Line in
fs=48kHz/16bits,A-Weighted
90
Line in
fs=96kHz/24bits,A-Weighted
90
Sampling Frequency Accuracy
Microphone
fs=48kHz/16bits
Line in
fs=48kHz/16bits
+0.0001
-0.0048
+0.009
-0.0034
Microphone
fs=48kHz/16bits
81
86
91
Channel Separation
Microphone
fs=96kHz/24bits
Line in
fs=48kHz/16bits
83
86
91
86
86
89
Line in
fs=96kHz/24bits
87
86
90
Frequency Response
Microphone
fs=48kHz/16bits,A-Weighted
-0.433
-0.484
Unit
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
%
dB
dB
dB
Revised: Nov. 2012
Page 54 / 63
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