SigmaTel, Inc.
Data Sheet
STAC9721
43
04/07/00
04/07/00
10.6
STAC9723 Analog Performance Characteristics (Tambient = 25 oC, AVdd = DVdd = 3.3V ±
5%, AVss=DVss=0V; 1 kHz input sine wave; Sample Frequency = 48 kHz; 0 dB = 1 Vrms, 10K
Ω/50pF load,
Testbench Characterization BW: 20 Hz – 20 kHz, 0 dB settings on all gain stages)
Table 36. Analog Performance Characteristics
PARAMETER
MIN
TYP
MAX
UNITS
Full Scale Output Voltage:
Line Inputs to line output 3.3V
Line Inputs to LINE_OUT 3.3V @ Line In =
1 Vrms and @ Gain setting of 4.5-6 dB
Line Inputs to LINE_OUT 3.3V @ Line In =
0.6 5 Vrms and @ gain setting of 0dB
PCM to LINE_OUT 3.3V @ full scale PCM input
@PCM gain setting of 0dB
PCM to Line Output 3.3V
MIC Inputs to LINE_OUT 3.3V @ MIC In
= 1 Vrms and @ gain setting of 0dB
-
0.65
0.65
0.65
0.555
0.5
-
Vrms
Vrms
Vrms
Vrms
Vrms
Full Scale Output Voltage:
Line Inputs to line output 3.3V
Line Inputs to LINE_OUT 3.3V @ Line In =
1 Vrms and @ Gain setting of -6 dB
Line Inputs to LINE_OUT 3.3V @ Line In =
0.5 Vrms and @ gain setting of 0dB
PCM to LINE_OUT 3.3V @ full scale PCM input
@PCM gain setting of 0dB
PCM to Line Output 3.3V
MIC Inputs to LINE_OUT 3.3V @ MIC In
= 1 Vrms and @ gain setting of 0dB
-
0.5
0.5
0.5
0.5
0.5
-
Vrms
Vrms
Vrms
Vrms
Vrms
Analog S/N:
CD to LINE_OUT 3.3V
Other to LINE_OUT 3.3V
-
90
90
-
Analog Frequency Response2
20
-
20,000
Hz
Digital S/N3
D/A 3.3V
A/D 3.3V
85
75
90
85
-
-
Total Harmonic Distortion:
Line Output4
-
-
0.02
%
D/A & A/D Frequency Response5
20
-
19,200
Hz
Transition Band
19,200
-
28,800
Hz
Stop Band
28,800
-
∞
Hz
Stop Band Rejection6
+85
-
−
dB
Out-of-Band Rejection7
-
+40
−
dB
Group Delay
-
-
1
ms
Power Supply Rejection Ratio (1kHz)
-
+40
−
dB
Crosstalk between Input channels
-
-
-70
dB
Spurious Tone Rejection
-
+100
−
dB
Attenuation, Gain Step Size
-
1.5
−
dB
Input Impedance
10
-
−
K
Ω
Input Capacitance
-
15
−
pF
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