10 / 46 page
ALC250 Data Sheet
Two Channel AC’97 2.3 Audio Codec
Rev1.01
6
5.3 Filter/Reference/NC
Name
Type Pin No
Description
Characteristic Definition
VREF
-
27
Reference voltage
1uf capacitor to analog ground
VREFOUT
O
28
Ref. voltage out
Analog DC voltage output (2.5V / 4.0V)
AFILT1
-
29
ADC anti-aliasing filter
1000pf capacitor to analog ground.
AFILT2
-
30
ADC anti-aliasing filter
1000pf capacitor to analog ground.
NC
-
31
Not Connection
DC VOL
I
32
DC
Voltage
Volume
Control
Analog Input (AGND~AVDD)
VREFOUT2
O
33
Secondary Ref. voltage out
Analog DC voltage output (2.5V / 4.0V)
VREFOUT3
O
37
Third Ref. voltage out
Analog DC voltage output (2.5V / 4.0V)
VAUX
I
34
Auxiliary Power to keep CD
and amplifier turned on.
+5V analog stand-by power
NC
-
40
Not Connection
NC
-
45
Not Connection
Total: 11 Pins
5.4 Power/Ground
Name
Type Pin No
Description
Characteristic Definition
AVDD1
I
25
Analog VDD (5.0V or 3.3V)
AVDD2
I
38
Analog VDD (5.0V or 3.3V)
AVSS1
I
26
Analog GND
AVSS2
I
42
Analog GND
DVDD1
I
1
Digital VDD (3.3V)
DVDD2
I
9
Digital VDD (3.3V)
DVSS1
I
4
Digital GND
DVSS2
I
7
Digital GND
Total: 8 Pins
Tel: +49(0)234-9351135 · Fax: +49(0)234-9351137 E-MAIL: info@cornelius-consult.de
http://www.
cornelius-consult.de
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
