41 / 48 page
SigmaTel, Inc.
Data Sheet
STAC9721
41
04/07/00
04/07/00
10.4
AC-Link Static Digital Specifications (Tambient = 25 oC, DVdd = 5.0V or 3.3V ± 5%,
AVss=DVss=0V; 50pF external load)
Table 34. AC-Link Static Specifications
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Input Voltage Range
Vin
-0.30
DVdd +
0.30
V
Low level input range
Vil
-
-
0.35xDVdd
V
High level input voltage
Vih
0.65xDVd
d
-
-
V
High level output voltage
Voh
0.90xDVd
d
-
-
V
Low level output voltage
Vol
-
-
0.1xDVdd
V
Input Leakage Current (AC-Link inputs)
-
-10
-
10
uA
Output Leakage Current (Hi-Z’d AC-Link
outputs)
-
-10
-
10
uA
Output buffer drive current
-
-
5
mA
10.5
STAC9721 Analog Performance Characteristics (Tambient = 25 oC, AVdd = 5.0V ± 5%, 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 35. Analog Performance Characteristics
PARAMETER
MIN
TYP
MAX
UNITS
Full Scale Input Voltage:
Line Inputs
Mic Inputs1
-
-
1.0
0.1
-
-
Vrms
Full Scale Output Voltage:
Line Output 5V
-
1.0
-
Vrms
Analog S/N:
CD to LINE_OUT 5V
Other to LINE_OUT 5V
90
-
98
98
-
-
dB
Analog Frequency Response2
20
-
20,000
Hz
Digital S/N3
D/A 5V
A/D 5V
85
75
96
87
-
-
dB
Digital S/N3
D/A 5V
A/D 5V
85
75
96
86
-
-
dB
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
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