AK4646EN AKM [Asahi Kasei Microsystems], AK4646EN Datasheet - Page 65

• Manufacturer Part Number: AK4646EN
• Description: Stereo CODEC with MIC/SPK-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

Figure 37 shows the system connection diagram for the AK4646. An evaluation board [AKD4646] is available which
demonstrates the optimum layout, power supply arrangements and measurement results.
MS0557-E-02
Power Supply
External MIC
2.2 ∼ 3.6V
Internal MIC
Line Out
Mono In
Notes:
- AVSS, DVSS and SVSS of the AK4646 should be distributed separately from the ground of external
- All digital input pins should not be left floating.
- When the AK4646 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of VCOC pin is not needed.
- When the AK4646 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of VCOC pin is shown in Table 4.
- When piezo speaker is used, 2.2 ∼ 4.0V power should be supplied to SVDD and 10 Ω or more series resistors
- When the AK4646 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, around 100k Ω pull-up resistor should be connected to LRCK and BICK pins of the AK4646.
10u
200
200
1u
1u
Figure 37. System Connection Diagram
25
26
27
28
29
30
31
32
NC
ROUT
LOUT
MIN
RIN2
LIN2
LIN1
RIN1
SYSTEM DESIGN
- 65 -
AK4646EN
Top View
Cp
Speaker
ZD1
ZD2
Dynamic SPK
Piezo SPK
DVSS
DVDD
BICK
LRCK
SDTO
SDTI
CDTIO
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
[AK4646]
DSP
2007/05
μP