ASAHI KASEI
[AK2307/LV]
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.
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-
-
-
-
-
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
MS0190-E-05
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2005/12
ASAHI KASEI
BLOCK DIAGRAM
[AK2307/LV]
Handset Mic
I/F
HANDT4
HANDT1
HANDT2
HANDT3
upto +25dB
VOL1
+14dB
SW1
Amp1
+14dB
SW2
SW3
+0dB
Amp3
TX Digital
Attenuator
16 steps
by 1dB
+7 to -8dB
AGC
A/D
(Back ground
Noise ATT)
8 steps
by 3dB
0 to -21dB
Linear
A/u
External Mic
I/F
MIC3
MIC1
MIC2
Amp2
16 Steps
Side Tone
by 3dB
Digital ATT
-12 to -57dB
PCM
Interface
16bit Linear
or
A/u-law
DX
DR
FS
BCLK
PCM CODEC
RX Digital
Volume
DAOUT
D/A
RAIN
VOL2
24 steps
by 1dB
0 to -23dB
0dB/+3dB
SW4
SW5
VOL3
24 steps
by 1dB
0 to -23dB
+
PAD
0/-9dB
8 steps
by 3dB
+6 to -21dB
Linear
A/u
Handset Receiver
output
HANDR
-1
150ohm Driver
VOL4
16 steps
by 3dB
0 to -45dB
-1
SW10
150ohm Driver
Tone Gen H
(DTMF-H)
PLL
Clock generator
PLLCAP
Headset Receiver
output
HEADO
0dB/+3dB
Amp5
+
L_ATT
-2.5dB
Tone Gen L
(DMTF-L)
CPU Interface
CSN
SCLK
DATA
SW6
SW7
0dB/+3dB
VOL5
16 steps
by 2dB
0 to -30dB
SW8
SW9
VREF
Voltage Reference
TAGND
Speaker output
SPO
Amp10
RAGND
10K ohm Driver
AVDD
AVSS
DVDD
DVSS
EXRIN
MS0190-E-05
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ASAHI KASEI
PIN ASSIGNMENT
[AK2307/LV]
HANDR
HEADO
VSS
VDD
FS
DX
BCLK
DR
DATA
SCLK
CSN
AVDD
MIC2
MIC1
1
2 TOP VIEW
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
PLLCAP
SPO
EXRIN
RAIN
DAOUT
RAGND
VREF
AVSS
TAGND
HANDT3
HANDT2
HANDT1
HANDT4
MIC3
MS0190-E-05
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2005/12
ASAHI KASEI
PIN CONDITIONS
[AK2307/LV]
Pin types;
NIN:
Normal Input
NOUT: Normal Output
TOUT: Tri-state output
AOUT: Analog output
PWR:
Power supply
AIN:
Analog Input
Table 1
Name
HANDT2
HANDT3
HANDT1
HANDT4
HANDR
MIC3
MIC2
MIC1
DAOUT
RAIN
HEADO
SPO
EXRIN
DATA
SCLK
CSN
DR
DX
BCLK
FS
DVSS
DVDD
AVSS
AVDD
PLLCAP
TAGND
RAGND
VREF
Type
AIN
AIN
AOUT
AIN
AOUT
AIN
AIN
AOUT
AOUT
AIN
AOUT
AOUT
AIN
I/O
Pin function
Max
MIn
Cap load Res load
comment
Analog input for Handset microphone
Analog input for Handset microphone
OPamp output for Handset microphone
Analog input for A/D converter
Analog output for Handset receiver
1000pF 150ohm
nd
2 Analog input for A/D converter
Analog input for External microphone
Output of External microphone amplifier
Analog output of D/A converter
Analog input to RX voice path
RX output for Headset receiver
1000pF 150ohm
RX output for External Speaker Driver
20pF 10kohm
External input for Speaker pre-driver
Data input for internal register access
50pF
Serial data clock for internal register
NIN
access
NIN Chip select input
NIN RX PCM data serial input
TOUT TX PCM data serial output. Tri-state output 50pF
NIN Bit clock input for DR, DX
NIN 8KHz frame sync signal input for PCM I/F
PWR Power supply for digital block:0V
PWR Power supply for digital block: 3.3V
PWR Power supply for Analog block:0V
PWR Power supply for Analog block: 3.3V
Output to connect the PLL loop filter
1.0uF external
AOUT
Capacitance
capacitance
1.0uF external
AOUT TX side Analog ground output.
capacitance
1.0uF external
AOUT RX side Analog ground output
capacitance
1.0uF external
AOUT Voltage reference output
capacitance
MS0190-E-05
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2005/12
ASAHI KASEI
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Power Supply Voltages
Analog/Digital Power Supply
VDD
-0.3
6.5
VSS Voltage
VSS
-0.1
0.1
Digital Input Voltage
V
TD
-0.3
VDD+0.3
Analog Input Voltage
V
TA
-0.3
VDD+0.3
Input current (except power supply pins)
I
IN
-10
10
Storage Temperature
Tstg
-55
125
Warning: Exceeding absolute maximum ratings may cause permanent damage.
Normal operation is not guaranteed at these extremes.
[AK2307/LV]
Units
V
V
V
V
mA
o
C
RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supplies
Analog/Digital power supply( AK2307LV)
Analog/Digital power supply( AK2307)
Ambient Operating Temperature
Frame Sync Frequency
Note) All voltages reference to ground : VSS=0V
Symbol
VDD
VDD
Ta
FS
Min
3.0
4.75
-10
-
Typ
3.3
5.0
8
Max
3.6
5.25
85
-
Units
V
V
o
C
kHz
MS0190-E-05
5
2005/12
DSP 与 ARM 处理器
