ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 79

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Figure 71, Figure 72 and Figure 73 shows the system connection diagram for the AK4644. An evaluation board
[AKD4644] is available which demonstrates the optimum layout, power supply arrangements and measurement results.
MS0477-E-01
Power Supply
External MIC
2.6 ∼ 3.6V
Internal MIC
Line Out
Mono In
Notes:
- AVSS, DVSS and HVSS of the AK4644 should be distributed separately from the ground of external
- All digital input pins should not be left floating.
- When the AK4644 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of VCOC pin is not needed.
- When the AK4644 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of VCOC pin is shown in Table 5.
- When the AK4644 is used at master mode, LRCK and BICK pins are floating before M/S bit is changed to “1”.
controllers.
Therefore, 100kΩ around pull-up resistor should be connected to LRCK and BICK pins of the AK4644.
10u
Figure 71. Typical Connection Diagram (AIN3 bit = “0”, MIC Input)
200
200
1u
1u
1u
25
26
27
28
29
30
31
32
10
10
MUTET
ROUT
LOUT
MIN
RIN2
LIN2
LIN1
RIN1
SYSTEM DESIGN
0.22u
0.22u
Headphone
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AK4644EN
Top View
Cp
DVSS
DVDD
BICK
LRCK
SDTO
SDTI
CDTI
CCLK
16
15
14
13
12
11
10
9
Analog Ground
0.1u
Digital Ground
[AK4644]
DSP
2006/10
µP