ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 100

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

Figure 69 and Figure 70 show the system connection diagram of the AK4648. The evaluation board [AKD4648]
demonstrates the optimum layout, power supply arrangements and measurement results.
MS0625-E-01
Line In
Line out
Stereo Speaker
Analog Supply
Mono In
Analog Supply
External MIC
Internal MIC
2.6 ∼ 3.6V
2.6 ∼ 5.0V
Notes:
- VSS1, VSS2, andVSS3 of the AK4648 should be distributed separately from the ground of external controllers.
- All digital input pins should not be left floating.
- When the AK4648 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of VCOC/RIN3 pin is not needed.
- When the AK4648 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of VCOC/RIN3 pin is should be
- When the AK4648 is used in master mode, LRCK and BICK pins are floating before M/S bit is changed to “1”.
Figure 69. Typical Connection Diagram (AIN3 bit = “0”, CAD0 = “0”, MIC Input, Stereo SPK Mode)
- When DVDD is supplied from AVDD via 10 Ω resistor, a capacitor should be 0.1 μ F or less.
connected as shown in Table 5.
Therefore, 100k Ω around pull-up resistor should be connected to LRCK and BICK pins of the AK4648.
10u
10u
220
220
1u
1u
Top View
ROUT
SPRP
HVDD
TEST
LIN4
NC
SYSTEM DESIGN
VCOM
SPLP
SPLN
SPRN
LOUT
VSS2
RIN2
(See Figure 51 and Figure 53)
2.2u
0.1u
HVCM
VSS2
AVDD
LIN2
RIN4
MIN
- 100 -
0.1u
Headphone
MUTET
VSS1
HPR
HPL
LIN1
NC
NC
DVDD
VSS3
MPWR
PDN
VCOC
NC
NC
SDTO
TVDD
MCKI
CAD0
RIN1
SCL
SDA
10
MCKO
TVDD
LRCK
SDTI
BICK
NC
NC
0.1u
0.1u
Ground
Analog
Digital
Ground
1.6 ∼ 3.6V
[AK4648]
Digital
CPU
μP
2007/06