ak4642e AKM Semiconductor, Inc., ak4642e Datasheet - Page 67

• Manufacturer Part Number: ak4642e
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Figure 45 and Figure 46 shows the system connection diagram for the AK4642. An evaluation board [AKD4642] is
available which demonstrates the optimum layout, power supply arrangements and measurement results.
MS0420-E-00
Power Supply
External MIC
2.6 ∼ 3.6V
Internal MIC
Line Out
Mono In
Notes:
- AVSS, DVSS and HVSS of the AK4642 should be distributed separately from the ground of external
- All digital input pins should not be left floating.
- When the AK4642 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of VCOC pin is not needed.
- When the AK4642 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of VCOC pin is shown in Table 4.
- When piezo speaker is used, 2.6 ∼ 5.25V power should be supplied to HVDD and 10Ω or more series resistors
- When the AK4642 is used at master mode, LRCK and BICK pins are floating before M/S bit is changed to “1”.
controllers.
should be connected to both SPP and SPN pins, respectively.
Therefore, 100kΩ around pull-up resistor should be connected to LRCK and BICK pins of the AK4642.
10u
200
200
Figure 45. Typical Connection Diagram (MIC Input)
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
- 67 -
AK4642EN
Top View
Cp
Speaker
ZD1
ZD2
Dynamic SPK
Piezo SPK
DVSS
DVDD
BICK
LRCK
SDTO
SDTI
CDTI
CCLK
R1, R2: Short
ZD1, ZD2: Open
R1, R2: ≥10Ω
ZD1, ZD2: Required
16
15
14
13
12
11
10
9
Analog Ground
0.1u
Digital Ground
[AK4642EN]
DSP
2005/09
µP