ASAHI KASEI [AK2307/LV]
MS0190-E-05
2005/12
1
AK2307/LV
SPEECH CODEC for Digital Key telephone (5.0V/3.3V)
GENERAL DISCREPTION
AK2307/LV is an integrated LSI with PCM CODEC,
Voice path control, MIC amplifier and Handset driver
suitable for PBX/KTS digital key telephone, VoIP
Telephone.
PCM CODEC is compliant to ITU specification, very
low noise, and low power dissipation CODEC. A-law
and u-law selectable through Serial I/F register.
PCM I/F provides Long/Short frame format and GCI.
The output is 8bit compressed data along with 16bit
linear format.
Voice path block consists of Tone generator, Volume
for both TX and RX, Analog inputs, outputs for
Handset speaker and the speaker for hands-free
conversation, and the path control switch.
Side tone can be added internally and its volume
is controlled through serial I/F.
FEATURES
-
2 MIC AMP for the handset and microphone are
integrated.
-
A 150 ohm handset driver and an extra 150 ohm
driver for a headset receiver are provided.
-
Path control and volume control via serial CPU
I/F
-
programmable tone generator
-
5.0V+/-5%, 3.3V+/-0.3V single power supply
-
Low noise, low power consumption
Package
28pin VSOP package
- Package size; 9.8*7.6mm(pin to pin)
- Pin pitch; 0.65mm
ASAHI KASEI [AK2307/LV]
MS0190-E-05
2005/12
3
PIN ASSIGNMENT
HANDR
HEADO
VSS
VDD
FS
DX
BCLK
DR
DATA
SCLK
CSN
AVDD
MIC2
MIC1
PLLCAP
SPO
EXRIN
RAIN
DAOUT
RAGND
VREF
AVSS
TAGND
HANDT3
HANDT2
HANDT1
HANDT4
MIC3
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
TOP VIEW
ASAHI KASEI [AK2307/LV]
MS0190-E-05
2005/12
4
PIN CONDITIONS
Pin types;
NIN: Normal Input
NOUT: Normal Output
TOUT: Tri-state output
AOUT: Analog output
PWR:
Power supply
AIN: Analog Input
Table 1
Name
Type
Pin function
Max
Cap load
MIn
Res load
comment
HANDT2
AIN Analog input for Handset microphone
HANDT3
AIN Analog input for Handset microphone
HANDT1 AOUT OPamp output for Handset microphone
HANDT4
AIN Analog input for A/D converter
HANDR
AOUT Analog output for Handset receiver
1000pF 150ohm
MIC3
AIN 2
nd
Analog input for A/D converter
MIC2
AIN Analog input for External microphone
MIC1
AOUT Output of External microphone amplifier
DAOUT
AOUT Analog output of D/A converter
RAIN
AIN Analog input to RX voice path
HEADO
AOUT RX output for Headset receiver
1000pF 150ohm
SPO
AOUT RX output for External Speaker Driver
20pF 10kohm
EXRIN
AIN External input for Speaker pre-driver
DATA
I/O Data input for internal register access
50pF
SCLK
NIN
Serial data clock for internal register
access
CSN
NIN Chip select input
DR
NIN RX PCM data serial input
DX
TOUT TX PCM data serial output. Tri-state output 50pF
BCLK
NIN Bit clock input for DR, DX
FS
NIN 8KHz frame sync signal input for PCM I/F
DVSS
PWR Power supply for digital block:0V
DVDD
PWR Power supply for digital block: 3.3V
AVSS
PWR Power supply for Analog block:0V
AVDD
PWR Power supply for Analog block: 3.3V
PLLCAP AOUT
Output to connect the PLL loop filter
Capacitance
1.0uF external
capacitance
TAGND
AOUT TX side Analog ground output.
1.0uF external
capacitance
RAGND
AOUT RX side Analog ground output
1.0uF external
capacitance
VREF
AOUT Voltage reference output
1.0uF external
capacitance
ASAHI KASEI [AK2307/LV]
MS0190-E-05
2005/12
5
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Units
Power Supply Voltages
Analog/Digital Power Supply
VDD
-0.3
6.5
V
VSS Voltage
VSS
-0.1
0.1
V
Digital Input Voltage
V
TD
-0.3
VDD+0.3
V
Analog Input Voltage
V
TA
-0.3
VDD+0.3
V
Input current (except power supply pins)
I
IN
-10
10
mA
Storage Temperature
Tstg
-55
125
o
C
Warning: Exceeding absolute maximum ratings may cause permanent damage.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Max
Units
Power Supplies
Analog/Digital power supply( AK2307LV)
VDD
3.0
3.3
3.6
V
Analog/Digital power supply( AK2307)
VDD
4.75
5.0
5.25
V
Ambient Operating Temperature
Ta
-10
85
o
C
Frame Sync Frequency
FS
-
8
-
kHz
Note) All voltages reference to ground : VSS=0V
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