alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 18

• Manufacturer Part Number: alc268
• Description: 2+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

6.3. Filter/Reference/Not Connected
6.4. Power/Ground
2+2 Channel High Definition Audio Codec
Name
Name
VREF
MIC1-VREFO-L
LINE1-VREFO
MIC2-VREFO
MIC1-VREFO-
R
JDREF
NC
NC
NC
NC
NC
NC
NC
Total
AVDD1
AVSS1
AVDD2
AVSS2
DVDD
DVSS
DVDD-IO
DVSS
DVDD
Total
Type
Type ALC268/-VB1
O
O
O
O
I
I
I
I
I
I
I
I
I
-
-
-
-
-
-
-
-
-
-
-
ALC268/-VB1
(LQFP-48)
(LQFP-48)
Pin No.
12 pins
Pin No
8 pins
27
28
29
30
32
40
14
15
33
43
44
45
25
26
38
42
-
1
4
9
7
-
Table 3.
ALC268Q
(QFN-48)
ALC268Q
Table 4.
(QFN-48)
Pin No.
11 pins
Pin No.
8 pins
33
27
28
29
14
15
37
43
44
45
40
-
-
25
26
38
42
9
1
3
7
-
Filter/Reference
Description
Ref. Resistor for Jack Detect
2.5V Reference Voltage
Bias Voltage for MIC1 Jack
Bias Voltage for LINE1 Jack 2.5V/3.2/4.2Vreference voltage
Bias Voltage for MIC2 Jack
Bias Voltage for MIC1 Jack
Not Connected
Not Connected
Not Connected
Not Connected
Not Connected
Not Connected
Not Connected
-
Power/Ground
Description
Analog VDD
(5V or 3.3V)
Analog GND
Analog VDD
(5V or 3.3V)
Analog GND
Digital VDD (3.3V) Digital power
Digital GND
Digital VDD
(1.5V~3.3V)
Digital GND
Digital VDD (3.3V) Digital power
-
10
Characteristic Definition
Analog power for mixer and amplifier
Analog ground for mixer and amplifier
Analog power for DACs and ADCs
Analog ground for DACs and ADCs
Digital ground
Scalable digital power for HDA link
Digital ground
-
Track ID: JATR-1076-21
Characteristic Definition
1µF capacitor to analog ground
2.5V/3.2/4.2Vreference voltage
2.5V/3.2/4.2Vreference voltage
20K, 1% resistor to analog
ground
-
-
-
-
-
-
2.5V/3.2/4.2Vreference voltage
-
-
ALC268 Series
Datasheet
Rev. 1.3