ASAHI KASEI
[AK4103]
AK4103
192kHz 24-Bit DIT
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
o
Sampling Rate up to 192kHz
o
Support AES3, IEC60958, S/PDIF & EIAJ CP1201 professional and consumer formats
o
Generates CRC codes and parity bits
o
On-chip RS422 line driver
o
16-byte on-chip buffer memory for Channel Status and User bits
o
Supports synchronous/asynchronous access to Channel Status and User bits
o
Supports multiple clock frequencies: 128fs, 256fs, 384fs and 512fs
2
o
Supports Left/Right justified and I S audio formats
o
Easy to use 4 wire, Serial Host Interface
o
Audio Routing Mode (Transparent Mode)
o
Power supply: 4.75 to 5.25V
o
TTL level I/F
o
Small Package: 24pin VSOP
o
Temperature range of -10 to 70
°C
MS0077-E-03
-1-
2002/12
ASAHI KASEI
[AK4103]
n
Block Diagram
TRANS
Drivers
DIF1
Drivers
DIF0
Drivers
Drivers
CKS0
Drivers
Drivers
MCLK
CKS1
DIF2
BICK
LRCK
SDTI
Audio Serial
Interface
Prescaler
C1
U1
V1
Register
Biphase
Encoder
RS422 Line Driver
VDD
VSS
BLS
TXP
TXN
FS0
FS1
FS2
FS3
Host Serial
Interface
CRC Generator
MUX
CDTI
CDTO
CCLK
CSN
MS0077-E-03
-2-
PDN
ANS
2002/12
ASAHI KASEI
[AK4103]
n
Ordering Guide
AK4103VF
-10
∼
+70°C
24pin VSOP (0.65mm pitch)
n
Pin Layout
V1
TRANS
PDN
MCLK
SDTI
BICK
LRCK
FS0/CSN
FS1/CDTI
FS2/CCLK
FS3/CDTO
C1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
U1
DIF2
DIF1
DIF0
TXP
TXN
VSS
VDD
CKS1
CKS0
BLS
ANS
Top
View
19
18
17
16
15
14
13
MS0077-E-03
-3-
2002/12
ASAHI KASEI
[AK4103]
PIN/FUNCTION
No.
1
2
3
Pin Name
V1
TRANS
PDN
I/O
I
I
I
Description
Validity Bit Input Pin
Audio Routing Mode (Transparent Mode) Pin at Synchronous mode
0: Normal mode, 1: Audio routing mode (transparent mode)
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.
Master Clock Input Pin
Audio Serial Data Input Pin
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.
Input/Output Channel Clock Pin
Indicates left or right channel, and can be configured as an output based on
the DIF2-0 inputs.
Sampling Frequency Select 0 Pin at Synchronous mode (Pull-down Pin)
Host Interface Chip Select Pin at Asynchronous mode (Pull-down Pin)
AK4112A Mode Pin at Audio routing mode
(Pull-down Pin)
0: Non-AKM receivers mode, 1: AK4112A mode
Sampling Frequency Select 1 Pin at Synchronous mode (Pull-down Pin)
Host Interface Data Input Pin at Asynchronous mode (Pull-down Pin)
Sampling Frequency Select 2 Pin at Synchronous mode (Pull-down Pin)
Host Interface Bit Clock Input Pin at Asynchronous mode (Pull-down Pin)
Sampling Frequency Select 3 Pin at Synchronous mode (Pull-down Pin)
Host Interface Data Output Pin at Asynchronous mode (Pull-down Pin)
Channel Status Bit Input Pin
Asynchronous/Synchronous Mode Select Pin
(Pull-up Pin)
0: Asynchronous mode, 1: Synchronous mode
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.
Clock Mode Select 0 Pin
(Pull-up Pin)
Clock Mode Select 1 Pin
(Pull-down Pin)
Power Supply Pin, 4.75V∼5.25V
Ground Pin, 0V
Negative Differential Output Pin
Positive Differential Output Pin
Audio Serial Interface Select 0 Pin
(Pull-down Pin)
Audio Serial Interface Select 1 Pin
(Pull-down Pin)
Audio Serial Interface Select 2 Pin
(Pull-down Pin)
User Data Bit Input Pin for Channel 1
(Pull-down Pin)
4
5
6
MCLK
SDTI
BICK
I
I
I/O
7
LRCK
I/O
8
FS0
CSN
AKMODE
FS1
CDTI
FS2
CCLK
FS3
CDTO
C1
ANS
BLS
I
I
I
I
I
I
I
I
O
I
I
I/O
9
10
11
12
13
14
15
CKS0
I
16
CKS1
I
17
VDD
-
18
VSS
-
19
TXN
O
20
TXP
O
21
DIF0
I
22
DIF1
I
23
DIF2
I
24
U1
I
Notes:
1. Internal pull-up and pull-down resistors are connected on-chip. The value of the resistors is 43kΩ (typ).
2. All input pins except internal pull-down/pull-up pins should not be left floating.
MS0077-E-03
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2002/12
ASAHI KASEI
[AK4103]
ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 3)
Parameter
Power Supply
Input Current (All pins except supply pins)
Input Voltage
Ambient Operating Temperature
Storage Temperature
Notes:
3. All voltages with respect to ground.
Symbol
VDD
IIN
VIND
Ta
Tstg
min
-0.3
-
-0.3
-10
-65
max
6.0
±10
VDD+0.3
70
150
Units
V
mA
V
°C
°C
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
Power Supply
Symbol
VDD
min
4.75
typ
5.0
max
5.25
Units
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
VIH
2.4
-
-
V
Low-Level Input Voltage
VIL
-
-
0.8
V
High-Level Output Voltage
(Except TXP/N pins: Iout=-400µA)
VOH
VDD-1.0
-
-
V
(TXP/N pins:
Iout= -8mA)
VOH
VDD-0.8
-
-
V
Low-Level Output Voltage
(Except TXP/N pins: Iout= 400µA)
VOL
-
-
0.4
V
(TXP/N pins:
Iout= 8mA)
VOL
-
-
0.6
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.
MS0077-E-03
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2002/12
