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Part Number AK4103

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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
- 2 -
Block Diagram
Host Serial
Interface
Audio Serial
Interface
BICK
LRCK
SDTI
TXP
MUX
CRC Generator
Prescaler
RS422 Line Driver
Biphase
Encoder
DIF2
Di DIF1
Di DIF0
Di
CKS1
Di CKS0
MCLK
BLS
TRANS
VSS
Di
VDD
Di
TXN
C1
U1
V1
FS0
FS1
FS2
FS3
Register
CSN
CCLK
CDTI
CDT
O
ANS
PDN
ASAHI KASEI
[AK4103]
MS0077-E-02
2001/12
- 3 -
Ordering Guide
AK4103VF -10
+70
°
C
24pin
VSOP
(0.65mm
pitch)
Pin Layout

6
5
4
3
2
1
V1
TRANS
MCLK
PDN
SDTI
BICK
LRCK
7
FS0/CSN
8
U1
DIF2
DIF1
DIF0
TXP
TXN
VSS
VDD
Top
View
10
9
FS1/CDTI
FS2/CCLK
FS3/CDTO
11
C1
12
CKS1
CKS0
BLS
ANS
19
20
21
22
23
24
18
17
15
16
14
13
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.