SigmaTel, Inc.
Data Sheet
STAC9721
o
10.4
AC-Link Static Digital Specifications (Tambient = 25 C, DVdd = 5.0V or 3.3V ± 5%,
AVss=DVss=0V; 50pF external load)
. AC-Link Static Specifications
Table 34
PARAMETER
Input Voltage Range
SYMBOL
MIN
TYP
MAX
UNITS
Vin
-0.30
DVdd +
0.30
V
Low level input range
High level input voltage
Vil
Vih
-
-
-
0.35xDVdd
V
V
0.65xDVd
-
d
High level output voltage
Voh
0.90xDVd
-
-
V
d
-
Low level output voltage
Input Leakage Current (AC-Link inputs)
Vol
-
-
-
-
-
0.1xDVdd
V
uA
uA
-10
-10
10
10
Output Leakage Current (Hi-Z’d AC-Link
outputs)
Output buffer drive current
-
-
5
mA
o
10.5 STAC9721 Analog Performance Characteristics (Tambient = 25 C, AVdd = 5.0V ± 5%, DVdd
=
3.3V ± 5%, AVss=DVss=0V; 1 kHz input sine wave; Sample Frequency = 48 kHz; 0 dB = 1 Vrms,
10KΩ/50pF load, Testbench Characterization BW: 20 Hz – 20 kHz, 0 dB settings on all gain stages)
. Analog Performance Characteristics
Table 35
PARAMETER
MIN
TYP
MAX
UNITS
Full Scale Input Voltage:
Line Inputs
-
-
1.0
0.1
-
-
Vrms
Mic Inputs1
Full Scale Output Voltage:
Line Output 5V
-
1.0
-
Vrms
dB
Analog S/N:
CD to LINE_OUT 5V
90
-
98
98
-
-
Other to LINE_OUT 5V
Analog Frequency Response2
20
-
20,000
Hz
dB
Digital S/N3
D/A 5V
85
75
96
87
-
-
A/D 5V
Digital S/N3
D/A 5V
85
75
96
86
-
-
dB
A/D 5V
Total Harmonic Distortion:
Line Output4
-
20
-
-
0.02
19,200
%
Hz
D/A & A/D Frequency Response5
Transition Band
Stop Band
19,200
28,800
+85
-
-
-
28,800
Hz
Hz
dB
∞
−
Stop Band Rejection6
41
04/07/00
04/07/00
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