AKM AK2303LV

ASAHI
KASEI
[AK2303LV]
AK2303LV
Dual PCM CODEC for PBX Analog Line Card
GENERAL DESCRIPTION
FEATURE
AK2303LV is a 3.3V dual PCM CODEC-Filter most
suitable for analog line card of PBX switch.
- Dual
PCM CODEC and Filtering systems for
PBX switch
- Independent functions on each channel
Controlled by the internal register or hard pin
- Power Down Mode (Register setting)
- Mute (Hard pin, register setting)
- Gain Adjustment: +6 to -18dB (1dB step by
register setting)
- Selectable PCM Data Interface Timing:
Long Frame / Short Frame/GCI
- Selectable PCM Data Rate:
4.096MHz, 2.048MHz (Register setting)
- OP Amp for External Gain Adjustment
- A-law/u-law Select (Hard pin, Register setting)
- Serial Interface for the internal register access
- Power on Reset
- Single Power Supply Voltage
- +3.3V ± 0.3V
- Low Power Consumption
- 35mW typ
CODEC-Filter is compliant with G711/G712
recommendations.
It includes Selectable A-law/u-law function, Internal
Gain Adjustment from +6dB to –18dB by 1dB step
control. All of these functions are controlled by the
internal register accessed through the serial interface.
Additionally, channel mute and A-law/u-law selection is
controlled by the hard pin.
PCM interface of AK2303LV supports Long Frame,
Short Frame clock formats and GCI format. 4.096MHz,
2.048MHz bit clock input is available for PCM interface.
PACKAGE
- 28pinVSOP
9.8 x 7.6 mm (0.65mm pin pitch)
MS0117-E-00
1
2001/09
ASAHI KASEI
[AK2303LV]
CONTENTS
ITEMS
PAGE
- BLOCK DIAGRAM….…………..………………………
3
- PIN ASSIGNMENT….……………………………..……
4
- PIN CONDITION……...…………………………………
5
- PIN FUNCTION…….……………………………………
6
- CIRCUIT DESCRIPTION….….……………………...… 8
- FUNCTIONAL DESCRIPTION…….…..………………
9
- PCM INTERFACE……….…………………….... 9
LONGFRAME/SHORTFRAME……….……
9
GCI…………………………………………….
12
- MUTE…………………………………….………
14
- GAIN ADJUSTMENT….…..…………………… 15
- RESET…………………………..……………….
16
- POWER DOWN……..……………………..…… 17
- SERIAL INTERFACE………….………….……
19
- MODE SETTING……..……………………..…..
23
- REGISTER……….………………………………………
24
- ABSOLUTE MAXIMUM RATINGS……..…………..… 28
- RECOMMENDED OPERATING CONDITIONS……..
28
- ELECTRICAL CHARACTERISTICS……..………...… 28
- APPLICATION CIRCUIT EXAMPLE…..…………...… 37
- PACKAGE INFORMATION……..…………………..…
2303-E-00
2
39
2001/09
ASAHI KASEI
[AK2303LV]
BLOCK DIAGRAM
GST0
VFTN0
GA0T
AAF0
GA0R
SMF0
AMPT0
VR0
VFR0
GSR0
CH0
GA1T
AAF1
GA1R
SMF1
CODEC
CH1
BGREF
R
i
3
MODE
TEST
ALAWN
MUTE1
MUTE0
A/u_SEL
Register
Power on Reset
PWDN
Internal
TXVlm1
TXVlm0
RXVlm1
PLL
VDD
VSS
2303-E-00
FS1
AMPR1
RXVlm0
LPC
FS0
DX
DR
FS
BCLK
AMPT1
VREF
PCM　I/F
AMPR0
GST1
VFTN1
VR1
VFR1
GSR1
CODEC
Serial
I/F
SCLK
DATA
CSN
2001/09
ASAHI KASEI
[AK2303LV]
PIN ASSIGNMENT
TEST
VFTN1
GST1
GSR1
VFR1
VR1
ALAWN
AVDD
DVDD
FS
BCLK
DX
DR
MUTE1
2303-E-00
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
4
VREF
MODE
VFTN0
GST0
GSR0
VFR0
AVSS
DVSS
VR0
LPC
CSN
DATA
SCLK
MUTE0
2001/09
ASAHI KASEI
[AK2303LV]
PIN CONDITION
Pin
#
Name
I/O
Pin type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
TEST
VFTN1
GST1
GSR1
VFR1
VR1
ALAWN
AVDD
DVDD
FS
BCLK
DX
DR
MUTE1
MUTE0
SCLK
DATA
CSN
LPC
VR0
DVSS
AVSS
VFR0
GSR0
GST0
VFTN0
I
I
O
O
I
O
I
－
－
I
I
O
I
I
I
I
I/O
I
O
O
－
－
I
O
O
I
(*2)
Analog
Analog
Analog
Analog
Analog
CMOS
27
MODE
I
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Analog
Analog
AC load
(MAX.)
DC load
(MIN.)
Outout status
(Power down
mode)
Remarks
Tied to AVSS
50pF
50pF
10kΩ(*1)
10kΩ(*1)
Hi-Z
Hi-Z
50pF
10kΩ
Hi-Z
15pF
Hi-Z
15pF
Hi-Z (Input)
0.22uF
50pF
10kΩ
Hi-Z
50pF
50pF
10kΩ(*1)
10kΩ(*1)
Hi-Z
Hi-Z
Analog
Analog
Analog
Analog
Tied to AVSS or
AVDD
More than 1.0uF
(*2)
28
VREF
O
Analog
*1) DC load(MIN.) includes a feedback resistance of input/output op-amp.
*2) Please tie to AVSS or AVDD, in order not to have a noise impact to the adjacent analog pins.
2303-E-00
5
2001/09
ASAHI KASEI
[AK2303LV]
PIN FUNCTION
Pin# Name
1
TEST
I/O
I
2
VFTN1
I
3
4
5
GST1
GSR1
VFR1
O
O
I
6
7
VR1
ALAWN
O
I
8
AVDD
-
9
DVDD
-
10
FS
I
11
BCLK
I
12
DX
O
13
DR
I
14
MUTE1
I
15
MUTE0
I
16
17
18
19
SCLK
DATA
CSN
LPC
2303-E-00
I
I/O
I
O
Function
TEST MODE setting (Please tie to AVSS)
0: Normal mode 1: Test mode
Negative analog input of the transmit OPamp(AMPT1) for channel 1.
Transmit gain is defined by the ratio of R2/R1.
R1 is the external input resister connected to this pin.
R2 is the external feedback resister connected between this pin and GST1.
Output of the transmit OPamp(AMPT1) for channel 1.
Output of the receive OPamp(AMPR1) for channel 1.
Negative analog input of the receive OPamp(AMTR1) for channel 1.
Receive gain is defined by the ratio of R4/R3.
R3 is the external input resister connected to this pin.
R4 is the external feedback resister connected between this pin and VR1.
Analog Output equivalent to the received PCM data for channel 1.
A-law/u-law Select
0：A-law
1：u-law
Positive supply voltage for analog circuit.
+3.3V supply.
Positive supply voltage for digital circuit.
+3.3V supply.
Frame sync input.
FS must be 8kHz clock which is synchronized with BCLK.
Bit clock of PCM data interface.
This clock is input for the internal PLL which gerenates the internal system clocks.
This clock defines the input/output data rate of DX and DR.
The frequency of BCLK should be 2.048MHz or 4.096MHz set via CPU register..
Serial output of PCM data.
The channel 1 data is output following the channel 0 data. The PCM data rate is
synchronized with BCLK. This output remains in the high impedance state except for the
period of transmitting PCM data.
Serial input of PCM data.
The channel 1 data is received following the channel 0 data. The PCM data rate is
synchronized with BCLK.
CH1 mute setting
0：mute
1：normal operation
CH0 mute setting
0：mute
1：normal operation
Clock input of serial interface.
Data input of serial interface.
Read and write enable of serial interface.
Pin for PLL loop filter.
External capacitance(Min 0.22uF) should be connected between this pin and AVSS.
6
2001/09
ASAHI KASEI
[AK2303LV]
Pin#
20
21
22
23
Name
VR0
DVSS
AVSS
VFR0
I/O
O
I
24
25
26
27
GSR0
GST0
VFTN0
MODE
O
O
I
I
28
VREF
O
2303-E-00
Function
Analog Output equivalent to the received PCM data for channel 0.
Ground for digital circuit.
Ground for analog circuit.
Negative analog input of the receive OPamp(AMTR0) for channel 0.
Receive gain is defined by the ratio of R4/R3.
R3 is the external input resister connected to this pin.
R4 is the external feedback resister connected between this pin and VR0.
Output of the receive OPamp(AMPR0) for channel 0.
Output of the transmit OPamp(AMPT0) for channel 0.
Positive analog input of the transmit Opamp(AMPT0) for channel 0.
MODE select
0：Register off mode
1：normal mode
Analog ground output.
External capacitance(1.0 uF) should be connected between this pin and AVSS.
7
2001/09
ASAHI KASEI
[AK2303LV]
CIRCUIT DESCRIPTION
Block
AMPT0,1
AMPR0,1
AAF0,1
A/D
D/A
SMF
BGREF
GA0T/R
GA1T/R
GATN
SERIAL I/F
PLL
PCM I/F
2303-E-00
Function
Op-amp for input gain adjustment. The gain is adjusted with external resistors.
The resistor larger than 10kΩ is recommended for the feedback resistor.
Op-amp for output gain adjustment. This op-amp is used as an inverting
amplifier. The gain is adjusted with external resistors. The resistor larger than
10kΩ is recommended for the feedback resistor.
Integrated anti-aliasing filter which prevents signals around the sampling rate
from folding back into the voice band. AAF is a 2nd order RC low-pass filter.
Converts analog signal to 8bit PCM data according to the companding schemes of
ITU recommendation G.711; A-law or u-law. The band limiting filter is also
integrated. The selection of companding schemes is set by ALAWN register or
hard pin as follows:
"H": u-Law
"L": A-Law
Expands 8bit PCM data according to A-law or u-law. The selection of
companding schemes is set by ALAWN register or hard pin as follows:
"H": u-Law
"L": A-Law
Extracts the inband signal from D/A output. It also corrects the sinx/x effect of
D/A output.
Provides the stable analog ground voltage using an on-chip band-gap reference
circuit which is temperature compensated. The output voltage is 1.5V for +3.3V
operation.
Gain selects of analog I/O signals. It is posibble to select gain from +6dB to -18dB
(1dB/step). Gain is defined by the internal register.
Interface to the internal register by using SCLK, DATA, and CSN pins.
PLL generates system clock of AK2303LV. Reference clock is BCLK
BCLK.
LK More than
0.22uF capacitance should be connected between LPC and VSS as a PLL Loop
filter.
PCM data rate is available for 4.096, 2.048MHz which synchronizes with BCLK.
Three kinds of data format (Long Frame, Short Frame,GCI) are available.
Data format is selected by the register “PCM IF”.
PCM IF = “L” LongFrame or ShortFrame (LF/SF are selected automatically)
PCM IF = “H” GCI
PCM data stream, which includes B1 and B2 data, is output through DX pin
and input through DR pin. B2 PCM data stream always follows B1 PCM data
stream.
B1/B2 and Ch0/Ch1 assignment is changed by the SEL2B
8
2001/09
ASAHI KASEI
[AK2303LV]
FUNCTIONAL DESCRIPTION
PCM Data Interface
AK2303LV supports the following 3 PCM data formats
Long Frame Sync(LF)
Short Frame Sync(SF)
GCI
PCM data of both channels are multiplexed and interfaced through the common pins(DR,DX).The first 8bit is defined as B1
channel and the seconds 8bit is defined as B2 channel in the PCM data stream.
The order of PCM data is MSB first in each channel.
Selection of the interface mode
The GCI and ordinary PCM interface(LF,SF) are selectable through the CPU register as following table.
Either LF or SF is automatically selected by means of detecting the length of 8KHz frame signal in AK2303LV when PCM I/F
is set to “0”.
Register for PCM Interface mode select(Address:100
PCMIF
PCM Interface
0
LF or SF
1
GCI
Bit:5)
Comments
LF/SF are selected automatically
∗ Default value after power-on reset =LF/SF mode(PCMIF=0).
LONG FRAME( LF ) / SHORT FRAME ( SF )
Automatic LF/SF selection
AK2303LV monitors the duration of the FS “H” level and selects either LF or SF interface format automatically.
Period of FS=”H”
Interface format
more than 2 clocks of BCLK
LF
1 clock of BCLK
SF
Timing of the interface
16 bits PCM data (B1 and B2) is accommodated in 1 frame (125us) defined by 8kHz frame sync signal.
Although there are 32 time slots at maximum in 8kHz frame (when BCLK=4.096MHz), PCM data for AK2303LV occupy one
time slot for channel 0 and channel 1, as is indicated in following.
Frame Sync signal (FS)
8kHz reference signal. This signal indicated the timing and the frame position of 8kHz PCM interface.
Bit Clock (BCLK)
BCLK defines the PCM data rate. BCLK can be varied 4.096, 2.048MHz. All internal clock of the LSI is generated based on
this BCLK signal.
Register for BCLK frequency select(Address:101 Bit:7,6)
CLKSEL[1:0]
BCLK frequency
00
Reserved
01
Reserved
10
2.048MHz
11
4.096MHz
2303-E-00
9
comments
Default value
2001/09
ASAHI KASEI
[AK2303LV]
Position of the Ch0,Ch1 PCM data in the DX/DR data flow
B1 and B2 channel of the PCM data channel are assigned to Analog Ch0 and Ch1 as is defined by SEL2B
register. Time-slot on PCM High-way (Time-slot#0~31(MAX)) can be also assigned for B1 and B2 channel data
set as is defined by TS[4:0] register.
Channel selection
CH0,1selection(Address:100
SEL2B
CH0
Bit:6)
CH1
0
B1
B2
1
B2
B1
Remarks
Default
on Reset
PCM Interface
Analog Interface
Channe0
B1
B2
Channel 1
SEL2B
Time slot Assignment
B1, B2 Time-slot selection (Address:101
Bit:4~0)
TS[4:0]
Time slot
B1
B2
The first half of 8bit
The latter half of
00000
0
in Time-slot#0
8bit in Time-slot#0
00001 to
The first half of 8bit
The latter half of
XX
11110
in Time-slot#XX
8bit in Time-slot#XX
The first half of 8bit
The latter half of
11111
31
in Time-slot#31
8bit in Time-slot#31
Remarks
Default
On Reset
FS
TS#0
Time slot#
ex)
Default
B1
ex)
TS[4:0]=2 setting
2303-E-00
B2
TS#1
TS#2
TS#3
DR/X
TS#31(max)
B1
DR/X
B1
B2
10
2001/09
ASAHI KASEI
[AK2303LV]
Long Frame
FS
BCLK
B1 ch
DX
DR
Don’t
care
B2 ch
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SEL2B=0
SEL2B=1
⇒
⇒
B1-CHANNEL (CH0)
B1-CHANNEL (CH1)
Don’t care
B2-CHANNEL (CH1)
B2-CHANNEL (CH0)
Short Frame
FS
BCLK
B1 ch
DX
Don’t
care
DR
B2 ch
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SEL2B=0 ⇒
SEL2B=1 ⇒
B1-CHANNEL (CH0)
B1-CHANNEL (CH1)
Don’t care
B2-CHANNEL (CH1)
B2-CHANNEL (CH0)
! Important Notice
Please set time-slot selection as proper value. Maximum time slot is determined from clock speed.
At the power up sequence, please set the mute by MUTE0/1 before power up.
Then release them after the CODEC initialization and TS assignment to avoid the PCM output data collision with other
CODEC’s PCM output.
Please don’t stop feeding FS and BCLK except in Full power down mode.
Internal PLL does free running when BCLK is not provided.
2303-E-00
11
2001/09
ASAHI KASEI
[AK2303LV]
GCI ( General Circuit Interface )
GCI data format and clocking which is used for ISDN application is shown as following.
4.096, 2.048MHz can be used for BCLK. Thus, data rate will be 2.048 or 1.024MHz.
Timing of the interface
8 bits PCM data is accommodated in 1 frame( 125us ) defined by 8kHz frame sync signal.
Although there are 16 time slots at maximum in 8kHz frame(when BCK=4.096MHz), PCM data on GCI occupy one time slot
for channel 0 and channel 1, as is indicated in following.
Frame Sync signal (FS)
8kHz reference signal. This signal indicates the timing and the frame position of 8kHz GCI. High level duration of the FS is 1
clock period of BCLK.
Bit Clock (BCLK)
BCLK defines the GCI data rate. All the internal clock of the LSI is generated based on this BCLK signal. The data rate of
GCI is half of BCLK. BCLK can be used either 4.096MHz or 2.048MHz.
Position of the Ch0,Ch1 GCI data in the DX/DR data flow
B1 and B2 channel of the GCI data channel are assigned to Analog Ch0 and Ch1 as is defined by SEL2B register
as same way as PCM interface. Time-slot also can be assigned by same way as PCM format.
Channel selection
CH0,1selection(Address:100
SEL2B
CH0
Bit:6)
CH1
0
B1
B2
1
B2
B1
Remarks
Default
On Reset
PCM Interface
Analog Interface
Channe0
B1
B2
Channel 1
SEL2B
Time slot Assignment
B1, B2 Time-slot selection (Address:101
Bit:4~0)
TS[4:0]
Time slot
B1
B2
The first half of 8bit
The latter half of
00000
0
in Time-slot#0
8bit in Time-slot#0
00001 to
The first half of 8bit
The latter half of
XX
01110
in Time-slot#XX
8bit in Time-slot#XX
The first half of 8bit
The latter half of
01111
15
in Time-slot#15
8bit in Time-slot#15
2303-E-00
12
Remarks
Default
On Reset
2001/09
ASAHI KASEI
[AK2303LV]
FS
TS#0
Time slot#
ex)
B1
Default
TS#1
TS#2
TS#3
TS#15(max)
DR/X
B2
B1
DR/X
ex)
B1
TS[4:0]=2 setting
B2
GCI
FS
BCLK
B1 ch
DX
DR
Don’t
care
B2 ch
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SEL2B=0 ⇒
SEL2B=1 ⇒
B1-CHANNEL (CH0)
B1-CHANNEL (CH1)
Don’t
care
B2-CHANNEL (CH1)
B2-CHANNEL (CH0)
! Important Notice
Please set time-slot selection as proper value. Maximum time slot is determined from clock speed.
At the power up sequence, please set the mute by MUTE0/1 before power up.
Then release them after the CODEC initialization and TS assignment to avoid the PCM output data collision with
other CODEC’s PCM output.
Please don’t stop feeding FS and BCLK except in Full power down mode.
Internal PLL does free running when BCLK is not provided.
2303-E-00
13
2001/09
ASAHI KASEI
[AK2303LV]
MUTE
The output on each channel can be muted independently through the CPU register as shown in the table.
Mute register( Address:100 Bit:5,4 )
MTCH0,1
Operation
DX pin
VRX pin
0
Normal
PCM data output
CODEC
analog output
1
Mute
High-Impedance(
*1)
AGND*
(*1)
MTCH0 and MTCH1 are the mute control bit for CH0 and CH1,respectively. B1 and B2 channel muted by MTCH0/1 is
defined by SEL2B bit shown in the PCM Interface section.
<EXAMPLE>
LF Mode CH0 mute (MTCH=1, MTCH1=0, SEL2B=0)
FS0
BCLK
DX
Don’t care
DR
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Don’t
care
B2-CHANNEL(CH1)
<SEL2B=”0”>
B1-CHANNEL(CH0)
<SEL2B=”0”>
VRX0
:
CODEC CH0 analog output is always at AGND level.
VRX1
:
CODEC CH1 analog output is the signal converted from the PCM data of CH1 input through DR pin.
GCI mode
CH0 mute (MTCH0=1, MTCH1=0, SEL2B=0)
FS0
BCLK
DX
Don’t care
DR
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
B1-CHANNEL(CH0)
<SEL2B=”0”>
Don’t
care
B2-CHANNEL(CH1)
<SEL2B=”0”>
VRX0
:
CODEC CH0 analog output is always at AGND level.
VRX1
:
CODEC CH1 analog output is the signal converted from the PCM data of CH1 input through DR pin.
2303-E-00
14
2001/09
ASAHI KASEI
[AK2303LV]
GAIN ADJUSTMENT
Analog input/output gain can be adjusted at the range from +6dB to –18dB by 1.0dB step through CPU register.
VR Register( Address:011 –000 Bit:4 –0)
GanT4
GanR4
GanT3
GanR3
GAnT2
GAnR2
GAnT1
GAnR1
GAnT0
GAnR0
Gain
[dB]
0
0
0
0
0
+6
0
0
0
0
1
+5
0
0
0
1
0
+4
0
0
0
1
1
+3
0
0
1
0
0
+2
0
0
1
0
1
+1
0
0
1
1
0
0
0
0
1
1
1
-1
0
1
0
0
0
-2
0
1
0
0
1
-3
0
1
0
1
0
-4
0
1
0
1
1
-5
0
1
1
0
0
-6
0
1
1
0
1
-7
0
1
1
1
0
-8
0
1
1
1
1
-9
1
0
0
0
0
-10
1
0
0
0
1
-11
1
0
0
1
0
-12
1
0
0
1
1
-13
1
0
1
0
0
-14
1
0
1
0
1
-15
1
0
1
1
0
-16
1
0
1
1
1
-17
1
1
---
---
---
-18
2303-E-00
15
Remarks
Default
2001/09
ASAHI KASEI
[AK2303LV]
RESET
Power on Reset
AK2303LV automatically generates the internal reset pulse which resets all the circuit that is necessary to start the
initialization after the power on reset. The CPU registers are set to the default value.
After the internal reset pulse is generated, CODEC Ch0/Ch1 starts the initialization procedure by being fed FS signal, and it
takes 180ms( typ.), 350ms(max) to complete the initialization after the detection of power on.
Power up slope to enable the Power-on Reset
When power-up slope is no longer than 50ms(=5tau:tau is time constant), Power On Reset works normally.
When the time is longer than 50ms, Power On Reset is not activated and no internal registers are initialized. In
this case all registers must be written through CPU interface.
NOTE) For stable operation after power up, we recommend to write all register value through CPU interface after power up.
Recommended start up procedure
The following start up procedure is recommended when AK2303LV is going to power up.
Power up
Wait 200ms
*In case of VDD rising time
=50ms(=5tau)
Write data to the internal
register through serial I/F
- FS=”L”
- BCLK=”L”
- MUTE 0/1=”L”
When 1stFS and BCLK are set to “L”, CODEC
ch0,ch1 dose not interface with external
devices.
- Write data to the internal register
before CODEC starts working.
Supply FS and BCLK
- CODEC Initialization starts.
Wait 130ms
- CODEC Initialization complete.
- MUTE 0/1=”H”
CODEC starts working
2303-E-00
16
2001/09
ASAHI KASEI
POWER
[AK2303LV]
DOWN
Power consumption is reduced in the power down mode.
In the power down mode, the current fed to analog circuits and the clock for digital circuits, are stopped, and the
related circuits hold its current status.
There are two power down modes.
- Power down for all circuits
- Power down by block
* In the power down mode, the output pins of corresponding blocks turn to Hi-Z. (See page 5)
POWER DOWN MODE SETTING
2 power down modes Mode
Circuits
Registers
All circuit
All
PD
CODEC
CH0
PDCH0
Operation for “0”/”1”
”0” : Normal
”1” : Power down
”0” : Normal
”1” : Power down
Block
CODEC
CH1
PDCH1
Note
- CPU Registers are not reset.(hold its
value)
- Serial I/F is available.
- No need to supply FS, BCLK.
- Keep supplying FS and BCLK.
- AMPTn, AMPRn(n=0,1) Input/Output is
active, even when CODEC CHn(n=0,1) is in
power down mode,
Please refer table of the next page in
detail.
WAKE UP FROM POWER DOWN MODE
After power down mode for CODEC CH0/CH1 is cleared, the CODEC circuit starts to be initialized.
It takes 130mS(typ).
WAKE UP FROM FULL POWER DOWN MODE
When full circuit power down mode for CODEC is cleared, AK2303LV starts the same wake up sequence as
one at power on. It takes 250ms(typ).
2303-E-00
17
2001/09
ASAHI KASEI
POWER
DOWN
BLOCK
[AK2303LV]
ALL
BLOCK
CODEC
CH0
CODEC
CH1
CODEC
CH0&1
PDCH0
PDCH1
PDCH0
PDCH1
PD
AMPT0
OFF
GA0T
OFF
OFF
OFF
AAF0
OFF
OFF
OFF
CODEC
CH0
OFF
OFF
OFF
SMF0
OFF
OFF
OFF
GA0R
OFF
AMPR0
OFF
AMPT1
OFF
GA1T
OFF
OFF
OFF
AAF1
OFF
OFF
OFF
CODEC
CH1
OFF
OFF
OFF
SMF1
OFF
OFF
OFF
GA1R
OFF
AMPR1
OFF
Channel 1
Channel 0
REGISTER
PCM I/F
OFF
PLL
OFF
BGREF
OFF
OFF
SERIAL I/F
2303-E-00
18
2001/09
ASAHI KASEI
[AK2303LV]
SERIAL INTERFACE
The internal registers can be read/written with SCLK, DATA, and CSN pins.
1word consists of 16bits. The first 4bits are the instruction code which specifies read/write.
The following 3bits specify the address. The rest of 8bits are for setting registers.
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
I3
I2
I1
I0
A2
A1
A0
*
D7
D6
D5
D4
D3
D2
D1
D0
Instruction code
(4bit)
Address
(3bit)
Data for internal registers
(8bit)
*
*)Dummy bit for adjusting the I/O timing when reading register.
INSTRUCTION CODEC
I3
I2
I1
I0
1
1
1
0
1
1
1
1
Read/Write
Read
Write
No action
Other codes
SCLK and WRITE/READ
(1) Input data are loaded into the internal shift register at the rising edge of SCLK.
(2) The rising edge of SCLK is counted after the falling edge of CSN.
(3) When CSN is “L” and more than 16 SCLK pulses:
th
[WRITE] Data are loaded into the internal register at the rising edge of the SCLK 16 pulse.
th
[READ] DATA pin is switched to an input pin at the falling edge of the SCLK 16 pulse.
CSN and WRITE / READ CANCELLATION
th
(1) WRITE is cancelled when CSN goes up before the rising edge of the SCLK 16 pulse.
th
(2) READ is cancelled when CSN goes up before the falling edge of the SCLK 16 pulse.
SERIAL WRITE / READ (SERIAL ACCESS)
(1) CSN must go up to “H” before the next access in successive access.
(2) When the next access is going to be done , if CSN remains to be “L”, successive access can not be done.
2303-E-00
19
2001/09
ASAHI KASEI
[AK2303LV]
WRITE
Continuous SCLK
Goes up anytime
after SCLK 16th pulse
Must goes up once
CSN
SCLK
1
Z
DATA
2
1
3
1
4
1
5
1
6
0
Instruction
Code
7
0
8
0
9
16
D7
*
Z
D0
Write data to
address”000”
Address
“000”
1
2
1
WRITE at the rising
edge of SCLK 16th
pulse
1
3
1
8
4
1
9
D7
15
D1
16
D0
Z
Write data
Instruction
Code
Burst SCLK
SCLK can be stop at “H” level or “L” level at anytime during the write cycle. After resuming the SCLK, write cycle is
retrieved
normally.
Goes up anytime
after SCLK 16th pulse
Must go up once
CSN
SCLK
1
Z
DATA
2
1
3
1
4
1
5
1
6
0
Instruction
Code
7
0
8
0
9
16
D7
*
D0
Write data to
address “000”
Address
”000”
Z
WRITE at the rising
edge of SCLK 16th
pulse
CANCELLATION
CSN goes “H” before the rising
edge of 16th SCLK pulse
CS
SCLK
DATA
1
Z
1
2
1
3
1
Instruction
Code
2303-E-00
4
1
5
0
6
0
Address
”000”
7
0
8
*
9
D7
16
Z
D0
Write data to
address”000”
Write is not
Excuted
20
Z
DATA pin : Input mode
(Hi-Z)
2001/09
ASAHI KASEI
[AK2303LV]
SERIAL ACCESS
Serial access with CSN staying “L” during the serise of write cycle.
CS
SCLK
DATA
1
Z
1
2
1
3
1
4
1
5
0
6
7
0
0
8
D7
*
Address
”000”
Instruction
Code
9
16
1
Z
D0
1
Write data to
Address”000”
2
3
1
8
4
1
1
9
15
D1
D7
16
Z
D0
Write data
Instruction
Code
EXCUTE!
NOT EXCUTED!
READ
CONTINOUS SCLK
Can be going up at anytime
after SCLK 16th pulse
Must go up once
CS
SCLK
DATA
1
Z
1
2
1
3
1
4
0
5
A2
Read
Instruction
6
7
A1 A0
8
Z
9
D7
16
1
Z
D0
1
Read Data
Address
2
1
3
1
4
0
Read
Instruction
8
9
D7
15
16
D1 D0
Z
Read Data
Read period
until the earlier edge of either CSN rising or SCLK 16th pulse
falling
Data output starts at the falling edge of SCLK 8th pulse
Burst SCLK
Can be going up at anytime
after SCLK 16th pulse
Must go up once
CS
SCLK
DATA
1
Z
1
2
1
3
1
Read
Instruction
4
0
5
A2
6
7
A1 A0
Address
8
Z
9
16
D0
D7
Z
Read Data
Read output starts at the falling edge of SCLK 8th pulse
2303-E-00
21
2001/09
ASAHI KASEI
[AK2303LV]
SERIAL ACCESS
Serial access with CSN staying “L” during the serise of read cycle.
CS
SCLK
DATA
1
Z
1
2
1
3
1
4
0
5
0
6
0
7
0
Z
9
D7
16
1
Z
D0
Read data
Address
”000”
Read
Instruction
8
1
2
1
3
1
4
8
9
15
16
Z
0
Read
Instruction
READ
EXCUTED!
READ
NOT EXCUTED!
DISCORD OF INSTRUCTION CODE
CS
SCLK
DATA
Z
1
2
3
4
5
I3
I2
I1
I0
A2
IInstructions except specified
0bbb
10bb
110b
(b=0 or 1)
2303-E-00
6
7
8
9
16
Z
A1 A0
Address
WRITE/READ
NOT EXCUTED!
Z
22
DATA pin: Input mode
(Hi-Z)
2001/09
ASAHI KASEI
[AK2303LV]
MODE SETTING
AK2303LV has a normal mode and a register off mode set by MODE pin. (pin#27)
In nomal mode, all registers are able to be accessed through the serial interface and the various functions listed
in the table of the next page can be controled via the interface.
In register off mode, all registers except volume are forced to defult value.
The register off mode eliminates the fatal abnormal condition of system caused by the crush of the internal
register value whitch may occurr due to the lightning, the strong electromagnetic field and quick power supply
change.
MODE pin status
MODE=”H” (AVDD)
MODE
Normal mode:
1.All registers can be accessed.
2. It iis highly recommended that all the register are to be
written periodically and after the abnormal circumstances
happens.
MODE=”L” (AVSS)
Register off mode:
1.Register data of address “100” and “101” are forced to defult
value. The register of adress “000” to “001” are remain to be
accessed.
2.ALAWN, MUTE1 and MUTE0 setting are valid only from pin
setting.
Attention: Please connect MODE pin to AVSS or AVDD.
2303-E-00
23
2001/09
ASAHI KASEI
[AK2303LV]
REGISTER
MAP
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
A2
A1
A0
*
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
*
0
0
-
GA0R4
GA0R3
GA0R2
GA0R1
GA0R0
0
0
1
*
0
0
-
GA1R4
GA1R3
GA1R2
GA1R1
GA1R0
0
1
0
*
0
0
-
GA0T4
GA0T3
GA0T2
GA0T1
GA0T0
0
1
1
*
0
0
-
GA1T4
GA1T3
GA1T2
GA1T1
GA1T0
1
0
0
*
ALAWN
SEL2B
PCMIF
MTCH1
MTCH0
PD
PDCH1
PDCH0
1
0
1
*
CLKSEL1
CLKSEL0
-
TS4
TS3
TS2
TS1
TS0
1
1
0
*
Reserved
1
1
1
*
Reserved
*) Dummy Bit
Note) All registers except “0” and “Reserved” can read/write.
Note) “0” bit data can not be written, however “0” data will be output when it is read.
Note) When mode pin is “L”, register address “100” and “101” is fixed to default value.
INITIALIZATION OF REGISTERS
The registers are initialized at POWER ON RESET only.
Power on reset may not be excuted due to the difference of power up time constant. Thus it is highly recommended
that all the register (address(000 – 101) ) are to be written at the time of the power up and after the abnormal circumstances
happens such as micro interrupt of the power line or mal operation due to lightning.
REGISTER FUNCTION
Address
000
001
2303-E-00
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Name
GA0R0
GA0R1
GA0R2
GA0R3
GA0R4
GA1R0
GA1R1
GA1R2
GA1R3
GA1R4
-
Default
0
1
1
0
0
Function
Receive gain adjustment on ch0
+6 to –18dB by 1.0dB step
0
1
1
0
0
Receive gain adjustment on ch1
+6 to –18dB by 1.0dB step
Refer
00000: +6dB 11xxx: -18dB
00000: +6dB 11xxx: -18dB
24
2001/09
ASAHI KASEI
Address
010
011
100
101
[AK2303LV]
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
Name
GA0T0
GA0T1
GA0T2
GA0T3
GA0T4
GA1T0
GA1T1
GA1T2
GA1T3
GA1T4
PDCH0
PDCH1
Default
0
1
1
0
0
Function
Transmit gain adjustment on ch0
+6 to –18dB by 1.0dB step
0
1
1
0
0
Transmit gain adjustment on ch1
+6 to –18dB by 1.0dB step
0
0
2
PD
0
3
4
MTDX0
MTDX1
0
0
5
PCMIF
0
6
SEL2B
0
7
ALAWN
1
CODEC CH0,1 Power down control
0: Power ON 1: Power OFF
Full Power down
0: Power ON 1: Power OFF
Mute control: VR0.VR1,DX pin
0: Normal output 1: Mute
PCM Interface select
0: LF/SF 1: GCI
PCM data channel select
0: CH0→B1 1: CH1→B1
A/u-law select
0: A-law 1: µ-law
0
1
TS0
TS1
0
0
2
3
4
5
TS2
TS4
TS5
-
0
0
0
0
6
CLKSEL0
0
7
CLKSEL1
1
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
* Please set the same frequency as BCLK input.
110
2303-E-00
Refer
00000: +6dB 11xxx: -18dB
00000: +6dB 11xxx: -18dB
Time slot setting
4.096MHz : 0 to 31
2.048MHz : 0 to 15
1.024MHz : 0 to 7
BCLK frequency setting *
CLKSEL[1:0]= 00: (Reserved)
01: (Reserved)
10: 2.048MHz
11: 4.096MHz
Reserved
25
2001/09
ASAHI KASEI
Address
111
2303-E-00
Bit
[AK2303LV]
Name
0
1
2
3
4
5
6
7
Default
0
0
0
0
0
0
0
0
Function
Reserved
26
Refer
2001/09
ASAHI KASEI
[AK2303LV]
MUTE 0
MUTE 1
Mute setting register
MTCH
0
( default: 0 )
Internal MUTE0 signal
( 1:Mute )
R
Internal MUTE1signal
MTCH
1
( default: 0 )
( 1:Mute )
R
ALAWN
Internal A-law signal
S
ALAWN
( default: 1 )
( 0: A-law, 1:u-law )
A-law /u-law setting register
MODE
Power-On Reset
Circuit
2303-E-00
27
Internal Reset signal
(Active high signal )
2001/09
ASAHI KASEI
[AK2303LV]
ABSOLUTE MAXIMUM RATINGS
Parameter
Power Supply Voltages
Analog/Digital Power Supply
VSS Voltage
Symbol
Min
Max
AVDD
DVDD
-0.3
6.5
AVSS
-0.1
0.1
DVSS
Digital Input Voltage
VTD
-0.3
VDD+0.3
Analog Input Voltage
VTA
-0.3
VDD+0.3
Input current (except power supply pins)
IIN
-10
10
Storage Temperature
Tstg
-55
125
Warning: Exceeding absolute maximum ratings may cause permanent damage.
Normal operation is not guaranteed at these extremes.
Units
V
V
V
V
mA
o
C
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Power Supplies
VDD
Analog/Digital power supply
Ambient Operating Temperature
Ta
Frame Sync Frequency
FS
Note) All voltages reference to ground : VSS=0V
Min
3.0
Typ
3.3
-40
Max
3.6
Units
V
o
85
C
kHz
Max
Units
8
ELECTRICAL CHARACTERISTICS
o
Unless otherwise noted, guaranteed for VDD=+3V±0.3V, Ta = –40 ~ +85 C, FS=8kHz.
DC Characteristics
Parameter
Power Consumption
Symbol
PDD1
VOH
Conditions
PDCH0,1 =0,0
All output unloaded
PD = 1
Power down
IOH=-1.6mA
VOL
IOL=1.6mA
BCLK=2048kHz
Output High Voltage
(CMOS level)
Output Low Voltage
(CMOS level)
Input High Voltage1
(CMOS level)
Input Low Voltage1
(CMOS level)
Input Leakage Current
Input Capacitance
Output Leakage Current
2303-E-00
PDDd
Min
35
mW
2.5
0.8VDD
V
0.4
VIH1
0.7VDD
VIL1
Ii
Ci
Io
Typ
-10
Tri-state mode
28
-10
V
V
0.3VDD
V
+10
5
+10
uA
pF
uA
2001/09
ASAHI KASEI
CODEC
[AK2303LV]
Absolute Gain (VDD=3.3V ±0.3V )
Parameter
Conditions
Analog Input Level
Input: 0dBm0@1020Hz
Absolute Transmit Gain
(Typ)
Analog Output Level
Absolute Receive Gain
Input: 0dBm0@1020Hz
(Typ)
Maximum Overload Level
+3.14dBm0
Min
(-0.15)
-0.25
(-0.15)
-0.25
Typ
0.531
0.531
0.762
Max
Units
Vrms
(+0.15) dB
+0.25
dB
Vrms
(+0.15) dB
+0.25
dB
Vrms
* Power supply and the temperature are in typical condition.
Gain Tracking
Parameter
Transmit Gain Tracking Error
Receive Gain Tracking Error
Frequency Response
Parameter
Transmit Frequency Response
Receive Frequency Response
Conditions
Reference Level: -55dBm0 ~-50dBm0
-10dBm0
-50dBm0 ~-40dBm0
1020Hz Tone
-40dBm0 ~ 3dBm0
Reference Level: -55dBm0 ~-50dBm0
-10dBm0
-50dBm0 ~-40dBm0
1020Hz Tone
-40dBm0 ~ 3dBm0
Min
-1.2
-0.4
-0.2
-1.2
-0.4
-0.2
Typ
-
Max
1.2
0.4
0.2
1.2
0.4
0.2
Units
Conditions
Relative to:
0.05kHz
0dBm0@1020Hz
0.06kHz
0.2kHz
0.3 ~3.0kHz
3.4kHz
4.0kHz
Relative to:
0 ~3.0kHz
0dBm0@1020Hz
3.4kHz
4.0kHz
Min
-1.8
-0.15
-0.8
-0.15
-0.8
-
Typ
-
Max
-30
-26
0
0.15
0
-14
0.15
0
-14
Min
25
30
36
25
30
36
-
Typ
-
Max
-46
dB
-
-46
dB
-
-42
dB
dB
dB
Units
dB
dB
Distortion
Parameter
Transmit Signal to Distortion
Receive Signal to Distortion
Conditions
-40dBm0 ~-45dBm0
-30dBm0 ~-40dBm0
0dBm0 ~-30dBm0
1020Hz Tone
-40dBm0 ~-45dBm0
-30dBm0 ~-40dBm0
0dBm0 ~-30dBm0
1020Hz Tone
Single Frequency Distortion
Transmit
Single Frequency Distortion
Receive
Intermodulation Distortion
-6dBm@860Hz,1380Hz
Note) C-message Weighted for u-Law, Psophometric Weighted for A-Law
2303-E-00
29
Units
dB
dB
2001/09
ASAHI KASEI
[AK2303LV]
Envelope delay Distortion
Parameter
Transmit Delay, Absolute
Transmit Delay, Relative
Conditions
f =1600Hz
f =500Hz ~600Hz
f =600Hz ~1000Hz
f =1000Hz ~2600Hz
f =2600Hz ~2800Hz
f =2800Hz ~3000Hz
f =1600Hz
f =500Hz ~1000Hz
f =1000Hz ~1600Hz
f =1600Hz ~2600Hz
f =2600Hz ~2800Hz
f =2800Hz ~3000Hz
Relative to f=1600Hz
Receive Delay, Absolute
Receive Delay, Relative
Relative to f=1600Hz
Min
-
Typ
-
Max
360
220
145
75
105
155
240
90
125
175
Typ
0
90
0
90
-
Max
10
-80
10
-80
-53
-40
-30
-
Units
us
us
us
us
Noise
Parameter
1)
Idle Channel Noise
A→D
2)
Idle Channel Noise
D→A
Noise, Single Frequency
Conditions
Min
u-law, C-message
A-law, Psophometric
u-law, C-message
A-law, Psophometric
VFXIN = 0 Vrms, DR = DX
f=0 ~100kHz
PSRR, Transmit
AVDD=DVDD=5V±100mVop
40
f=0 ~50kHz
PSRR, Receive
AVDD=DVDD=5V±100mVop
40
f=0 ~50kHz
Spurious Out-of-Band Signal
0dBm0,
4.6 ~7.6kHz
3)
at VRX Output
0.3 ~3.4kHz
7.6 ~8.4kHz
PCM CODE
8.4 ~100kHz
Note 1) Analog Input = Analog Ground
Note 2) Digital Input(DR) = +0 Code
Note 3) Not tested in production Test. Parameters guaranteed by design.
Units
dBrnC0
dBm0p
dBrnC0
dBm0p
dBm0
-
-
dB
-
-
dB
-
-30
-40
-32
dB
Interchannel Crosstalk
Parameter
Transmit to Receive
Receive to Transmit
Transmit to Transmit
Receive to Receive
Conditions
0dBm0@VFXIN, Idle PCM code
0dBm0 code level, VFXIN = 0 Vrms
0dBm0@VFXIN, Idle PCM code
0dBm0 code level, VFXIN = 0 Vrms
Min
-
Typ
-
Max
-75
-75
-75
-75
Units
dB
dB
dB
dB
Intrachannel Crosstalk
Parameter
Transmit to Receive
Receive to Transmit
Conditions
0dBm0@VFXIN, Idle PCM code
0dBm0 code level, VFXIN = 0 Vrms
Min
-
Typ
-
Max
-75
-75
Units
dB
dB
Min
10
-
Typ
2.25
Max
50
Units
kΩ
pF
Vp-p
Analog Interface Transmit Amplifier
Parameter
Load Resistance
Load Capacitance
Output voltage Swing
2303-E-00
Conditions
GSTn(n=0,1)
30
2001/09
ASAHI KASEI
[AK2303LV]
Analog Interface Receive Output (VDD: 3.3V±0.3V)
Parameter
Conditions
Output voltage(AGND level)
+0 PCM code input
Load Resistance
Load Capacitance
Output voltage Swing
VRn(n=0,1)
Min
10
Typ
1.5
Max
-
-
2.25
50
-
Units
V
kΩ
pF
Vp-p
Min
10
-
Typ
2.25
Max
50
-
Units
kΩ
pF
Vp-p
Analog Interface Receive Output Amplifier
Parameter
Load Resistance
Load Capacitance
Output Voltage Swing
Conditions
GSRn(n=0,1)
VOLUME ( GA0T,GA0R,GA1T,GA1R)
Parameter
Step margin
Pin
Conditions
Relative to: 0dB
Min
-1.0
typ
max
Unit
+1.0*) dB
*)Monotonus increase/decrease is guranteed
2303-E-00
31
2001/09
ASAHI KASEI
PCM INTERFACE ( Long Frame, Short Frame, GCI )
[AK2303LV]
o
Unless otherwise noted, the specification applies for TA = -40 to +85 C, VDD = 5V±5%/3V±0.3V,VSS = 0V and
FS0= 8kHz. All timing parameters are measured at VOH = 0.8VDD and VOL =0.4V.
Parameter
Symbol
Min
Typ
Max
Units Ref Fig
FS Frequency
1/tPF
-
8
-
kHz
BCLK Frequency
1/tPB
2048
4096
kHz
BCLK Pulse Width High
tWBH
80
ns
BCLK Pulse Width Low
tWBL
80
ns
Rising Time: (BCLK,FS0,FS1,DX0,DX1,DR0,DR1)
tR
40
ns
Falling Time: (BCLK,FS0,FS1,DX0,DX1,DR0,DR1)
tF
40
ns
Hold Time: BCLK Low to FS High
tHBF
40
ns
Setup Time: FS High to BCLK Low
tSFB
70
ns
Setup Time: DR to BCLK Low
tSDB
40
ns
Hold Time: BCLK Low to DR
tHBD
40
ns
Delay Time: BCLK High to DX valid
Note1)
tDBD
60
Fig1
Fig2
Fig3
ns
Long Frame
nd
Hold Time: 2 period of BCLK Low to FS Low
tHBFL
Delay Time: FS or BCLK High, whichever is later,to DX valid
Note1)
tDZFL
Delay Time: BCLK Low to DX High-Z
tDZCL
10
tWFSL
1
BCL
K
Hold Time: BCLK Low to FS Low
tHBFS
40
ns
Setup Time: FS Low to BCLK Low
tSFBS
40
ns
tDZCS
10
60
ns
BCLK Frequency
1/tPBG
2048
4096
kHz
Delay Time: Second BCLK Low to DX High-Z
tDZCG
10
60
ns
Setup Time: DR to Second BCLK High
tSDBG
40
ns
Hold Time: Second BCLK High to DR
tHBDG
40
ns
Note1)
FS Pulse Width Low
40
ns
60
ns
60
ns
Fig1
Short Frame
Delay Time: BCLK Low to DX High-Z
Note1)
Fig2
GCI
Fig3
Note1) Measured with 150pF Load capacitance and driving two LSTTLs
2303-E-00
32
2001/09
ASAHI KASEI
[AK2303LV]
tFB
tRB
tWBL
tWBH
tPB
BCLK
tHBFL
tSF
FS
tHBF
tDZF
tDZC
tDB
DX
MSB
2
3
4
MSB
2
6
7
8
5
6
7
8
tHB
tSD
DR
5
3
4
FS
tPF
tWFSL
Fig1 PCM Interface Timing < Long Frame >
tFB
tRB
tWB
tWBH
tPB
BCLK
tSF
tHBF
FS
tHBF
tSFB
tDBD
tDBD
tDZC
DX
MSB
2
3
4
tSD
DR
MSB
2
3
5
6
7
8
tHB
4
5
6
7
8
Fig2 PCM Interface Timing < Short Frame >
2303-E-00
33
2001/09
ASAHI KASEI
[AK2303LV]
FS
tPB
1 2 3 4 5 6 7 8 9 10111213141516
tWB
BCLK
tDB
DX
MS
2
3
4
5
MS
2
3
6
7
6
7
8
MS
2
3
4
5
6
7
MS
2
3
4
5
6
7
8
tHBD
tSDB
DR
tWB
tDZC
4
5
8
8
BCLK
tSF
tHBFS
tWFSL
FS
tHBF
tDZFL
DX
1
2
3
Fig3 PCM Interface Timing < GCI >
2303-E-00
34
2001/09
ASAHI KASEI
SERIAL INTERFACE
[AK2303LV]
Parameter
Symbol
SCLK Frequency
Min
1/tPSCLK
Typ
Max
4
Units Ref fig
MHz
SCLK Pulse Width High
tWSH
40
ns
SCLK Pulse Width Low
tWSL
40
ns
CS(bar) Pulse Width Low
tWCL
16
SCL
K
Hold Time: SCLK High to CS(bar) Low
tHCS
80
ns
Setup Time: CS Low to SCLK High
tSCS
40
ns
Rising Time: CS(bar),SCLK
tR
100
ns
Falling Time: CS(bar),SCLK
tF
100
ns
Fig4
W R I T E
Setup Time: DATA to SCLK High
tSDC
40
ns
Hold Time: SCLK High to DATA
tHDC
40
ns
Hold Time: SCLK Low to CS(bar) High
tHCS2
0
ns
Delay Time: SCLK Low to DATA pin drive
tDDD
0
ns
Delay Time: SCLK Low to DATA valid
tDVD
Delay Time: SCLK Low to DATA High-Z
tDZSD
Delay Time: CS High to DATA High-Z
CS(bar) Pulse Width High
Fig4
R E A D
Fig5
2303-E-00
35
60
ns
0
60
ns
tDZCD
0
60
ns
tWCH
40
Fig6
ns
2001/09
ASAHI KASEI
[AK2303LV]
tWCL
CS(bar)
tWSH tWSL
tHC
tF
tPSC
tR
tHC
SCLK
tHDC
tSC
DATA
tSD
I3
I2
I0
A2
A0
*
D
D6 -
D
Fig4 Serial Interface Timing <WRITE>
tWCL
CS(bar)
tWSH
tHCS
tF
tPSCLK
tWSL
tR
tHCS
SCLK
tHDC
tSC
tDVD
tSD
tDDD
Z
DATA
I3
I2
I0
A2
A0
D7
D6 D1
D0
Fig5 Serial Interface Timing <READ>
tWCH
CS(bar)
SCLK
tDZSD
DATA
D1
D0
tDZCD
Z
I1
I0
D0
Z
Fig6 Serial Interface Timing <READ>
2303-E-00
36
2001/09
ASAHI KASEI
[AK2303LV]
APPLICATION CIRCUIT EXAMPLE
Analog input circuit(AMPT0,1)
AK2303LV has an op-amp at analog input of each channel. Each op-amp can be used as a gain adjustment.
Op-amp can be used as an inverting amplifier. Feedback resistor must be 10kΩ or larger.
AK2303LV
GSTn
R2
(n=0,1)
C1
R1
VFTn
AMPTn
C1=0.47uF
R1=R2=33K ohm
Analog output circuit(AMPR0,1)
AK2303LV has an op-amp at analog output stage of each channel to consist in an inverting amplifier for a gain
adjustment of 0dBm0 level. Feedback resistor must be 10kΩ or larger.
AK2303LV
BGREF
GSRn
(n=0,1)
R1
R1=R2=33K ohm
VFRn
R2
VRn
2303-E-00
GAnR
37
2001/09
ASAHI KASEI
[AK2303LV]
Analog ground stabilization capacitor
An external capacitor of more than 1.0uF should be connected between VREF and VSS to stabilize analog
ground (VREF).
AK2303LV
VREF
AVSS
C
+
PLL Loop filter capcitor
An external capacitor of more than 0.22uF should be connected between LPC and VSS.
C
+
AK2303LV
LPC
AVSS
Power Supply
To attenuate the power supply noise, connect capacitors between VDD and VSS, as shown below.
A K 230 3LV
AVDD
C 1= 0.1µ F
+
C1
C2
C 2= 10µF
AVSS
D VD D
+
C1
C2
D V SS
2303-E-00
38
2001/09
ASAHI KASEI
[AK2303LV]
PACKAGE INFORMATION
- 28pin VSOP
Marking
(1) Date Code and Lot#: 9 digit XXXXXXXXX
(2) Marketing Code: AK2303LV
(3) AKM Logo
AK2303LV
AKM
AK2303LV
XXXXXXXXX
2303-E-00
39
2001/09
ASAHI KASEI
[AK2303LV]
28pin VSOP (Unit: mm)
*9.8±0.2
28
15
5.6
7.6±0.2
A
14
1
0.15+0.10
-0.05
0.65
0.22+0.10
-0.05
0.12
M
0.10±0.05
1.15±0.10
Seating Plane
0.5±0.2
Detail A
0.08
0-10°
NOTE: Dimension "*" does not include mold flash.
2303-E-00
40
2001/09
ASAHI KASEI
•
•
•
•
•
[AK2303LV]
IMPORTANT NOTICE
These products and their specifications are subject to change without notice. Before considering any
use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized
distributor concerning their current status.
AKM assumes no liability for infringement of any patent, intellectual property, or other right in the
application or use of any information contained herein.
Any export of these products, or devices or systems containing them, may require an export license or
other official approval under the law and regulations of the country of export pertaining to customs and
tariffs, currency exchange, or strategic materials.
AKM products are neither intended nor authorized for use as critical components in any safety, life
support, or other hazard related device or system, and AKM assumes no responsibility relating to any
such use, except with the express written consent of the Representative Director of AKM. As used
here:
(a) A hazard related device or system is one designed or intended for life support or maintenance of
safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure
to function or perform may reasonably be expected to result in loss of life or in significant injury or
damage to person or property.
(b) A critical component is one whose failure to function or perform may reasonably be expected to
result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or
system containing it, and which must therefore meet very high standards of performance and
reliability.
It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or
otherwise places the product with a third party to notify that party in advance of the above content and
conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and
hold AKM harmless from any and all claims arising from the use of said product in the absence of such
notification.
2303-E-00
41
2001/09