ASAHI KASEI
[AK4103]
MS0077-E-02
2001/12
- 1 -
GENERAL DESCRIPTION
The AK4103 is a digital audio transmitter(DIT) which supports data rate up to 192kHz sample rate
operation. The AK4103 encodes and transmits audio data according to the AES3, IEC60958, S/PDIF &
EIAJ CP1201 interface standards. The AK4103 accepts audio and digital data, which is then
multiplexed, encoded and driven on to a cable. The audio serial port is double buffered and supports
eight formats.
FEATURES
Sampling Rate up to 192kHz
Support AES3, IEC60958, S/PDIF & EIAJ CP1201 professional and consumer formats
Generates CRC codes and parity bits
On-chip RS422 line driver
16-byte on-chip buffer memory for Channel Status and User bits
Supports synchronous/asynchronous access to Channel Status and User bits
Supports multiple clock frequencies: 128fs, 256fs, 384fs and 512fs
Supports Left/Right justified and I
2
S audio formats
Easy to use 4 wire, Serial Host Interface
Audio Routing Mode (Transparent Mode)
Power supply: 4.75 to 5.25V
TTL level I/F
Small Package: 24pin VSOP
Temperature range of -10 to 70
°
C
192kHz 24-Bit DIT
AK4103
ASAHI KASEI
[AK4103]
MS0077-E-02
2001/12
- 4 -
PIN/FUNCTION
No. Pin
Name
I/O
Description
1
V1
I
Validity Bit Input Pin
2
TRANS
I
Audio Routing Mode (Transparent Mode) Pin at Synchronous mode
0: Normal mode, 1: Audio routing mode (transparent mode)
3
PDN
I
Power Down & Reset Pin (Pull-up Pin)
When "L", the AK4103 is powered-down, TXP/N pins are "L" and the
control registers are reset to default values.
4
MCLK
I
Master Clock Input Pin
5
SDTI
I
Audio Serial Data Input Pin
6
BICK
I/O
Audio Serial Data Clock Input/Output Pin
Serial Clock for SDTI pins which can be configured as an output based on
the DIF2-0 inputs.
7
LRCK
I/O
Input/Output Channel Clock Pin
Indicates left or right channel, and can be configured as an output based on
the DIF2-0 inputs.
FS0
I
Sampling Frequency Select 0 Pin at Synchronous mode (Pull-down Pin)
CSN
I
Host Interface Chip Select Pin at Asynchronous mode (Pull-down Pin)
8
AKMODE
I
AK4112A Mode Pin at Audio routing mode (Pull-down Pin)
0: Non-AKM receivers mode, 1: AK4112A mode
FS1
I
Sampling Frequency Select 1 Pin at Synchronous mode (Pull-down Pin)
9
CDTI
I
Host Interface Data Input Pin at Asynchronous mode (Pull-down Pin)
FS2
I
Sampling Frequency Select 2 Pin at Synchronous mode (Pull-down Pin)
10
CCLK
I
Host Interface Bit Clock Input Pin at Asynchronous mode (Pull-down Pin)
FS3
I
Sampling Frequency Select 3 Pin at Synchronous mode (Pull-down Pin)
11
CDTO
O
Host Interface Data Output Pin at Asynchronous mode (Pull-down Pin)
12
C1
I
Channel Status Bit Input Pin
13
ANS
I
Asynchronous/Synchronous Mode Select Pin (Pull-up Pin)
0: Asynchronous mode, 1: Synchronous mode
14
BLS
I/O
Block Start Input/Output Pin (Pull-down Pin)
In normal mode, the channel status block output is "H" for the first four
bytes. In audio routing mode, the pin is configured as an input. When PDN=
"L", BLS pin goes "H" at Normal mode.
15
CKS0
I
Clock Mode Select 0 Pin (Pull-up Pin)
16
CKS1
I
Clock Mode Select 1 Pin (Pull-down Pin)
17 VDD
- Power Supply Pin, 4.75V
5.25V
18
VSS
-
Ground Pin, 0V
19
TXN
O
Negative Differential Output Pin
20
TXP
O
Positive Differential Output Pin
21
DIF0
I
Audio Serial Interface Select 0 Pin (Pull-down Pin)
22
DIF1
I
Audio Serial Interface Select 1 Pin (Pull-down Pin)
23
DIF2
I
Audio Serial Interface Select 2 Pin (Pull-down Pin)
24
U1
I
User Data Bit Input Pin for Channel 1 (Pull-down Pin)
Notes:
1. Internal pull-up and pull-down resistors are connected on-chip. The value of the resistors is 43k
(typ).
2. All input pins except internal pull-down/pull-up pins should not be left floating.
ASAHI KASEI
[AK4103]
MS0077-E-02
2001/12
- 5 -
ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 3)
Parameter Symbol
min
max
Units
Power Supply
VDD
-0.3
6.0
V
Input Current (All pins except supply pins)
IIN
-
±
10
mA
Input Voltage
VIND
-0.3
VDD+0.3
V
Ambient Operating Temperature
Ta
-10
70
°
C
Storage Temperature
Tstg
-65
150
°
C
Notes:
3. All voltages with respect to ground.
WARNING: Operation at or beyond these limits may results in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(VSS=0V; Note 1)
Parameter Symbol
min
typ
max
Units
Power Supply
VDD
4.75
5.0
5.25
V
*AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
DC CHARACTERISTICS
(Ta=25
°
C; VDD=4.75~5.25V)
Parameter Symbol
min
typ
max
Units
Power Supply Current (fs=108kHz, Note 4)
IDD
6
15
mA
High-Level Input Voltage
Low-Level Input Voltage
VIH
VIL
2.4
-
-
-
-
0.8
V
V
High-Level Output Voltage
(Except TXP/N pins: Iout=-400µA)
(TXP/N pins: Iout= -8mA)
Low-Level Output Voltage
(Except TXP/N pins: Iout= 400µA)
(TXP/N pins: Iout= 8mA)
VOH
VOH
VOL
VOL
VDD-1.0
VDD-0.8
-
-
-
-
-
-
-
-
0.4
0.6
V
V
V
V
Input Leakage Current
Iin
-
-
±
10 µA
Notes:
4. Power supply current (IDD) is 3mA(typ)@fs=48kHz and 9mA(typ)@fs=192kHz.
IDD increases by 20mA(typ) with professional output driver circuit.
IDD is 350µA(typ) if PDN= "L", TRANS= "H" and all other input pins except internal pull-up/pull-down pins are
held to VSS.