[AK4675]
SYSTEM DESIGN
Figure 114 shows the system connection diagram for the AK4675. An evaluation board [AKD4675] is available which
demonstrates the optimum layout, power supply arrangements and measurement results.
Condition: Internal Full-differential Mic, External pseudo differential Mic, Receiver Output, I²C mode; Battery Monitor
is used; the PDNA pin of HP/SPK-Amp blocks is controlled by the GPO1 pin.
Analog
Ground
Digital
Ground
Headphone
10u
Analog
Digital
(Base Band)
1.6 ∼ 3.6V
2.6 ∼ 3.6V
Base Band
2.2u
Battery
TEST
AVDD
VSS1
HPR
VCOM
VCOC
HPL
PVDDA VSS3A
CP
SDTIA
PDNA
VSS4
DVDD
NC
GPO2
BICKA
MCKIA
SDA
Receiver
0.1u
0.1u
RCN
VBATO VCOCBT PVEE SDTOA SYNCA
CN
0.1u
Digital
(μP & CPU)
1.6 ∼ 3.6V
ROUT3 VCOMA
RIN4
PVDD
VSS2
TVDD2 TVDDA
TEST6
Line In
VBATIN LOUT3
LIN3
μP
0.22u
RCP
RIN3
IN2+
IN1+
LIN1A
LIN4
RIN1A
SAIN2
SAIN1
MCKO
SCL
DC
AK4675EG
Top View
Measurement
MCKI
TEST5
PDN
BICK
IN2−
External MIC
Internal MIC
SAIN3
LRCK
VSS1A
CPU
0.1u
SAVDD SDTOB SDTO
BICKB
NC
TEST3 AVDDA
IN1−
0.22u
MPWR ROUT2S
NC
VSS3
SPN
SYNCB SDTIB TEST4
SPIN
MDT LOUT2S
NC
SVDDA VSS2A TVDD3
SPP
TEST2
SDTI
GPO1
0.1u
0.1u
Bluetooth
Module
Battery or
AC Adaptor
3.0 ∼ 5.5V
10u
Digital
(Bluetooth)
1.6 ∼ 3.6V
Speaker
MS0963-E-00
2008/05
- 174 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
