AK4634 Datasheet, PDF (73/77 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

[AK4634]
SYSTEM DESIGN
Figure 57 and Figure 58 show the system connection diagram. The evaluation board [AKD4634] demonstrates the
optimum layout, power supply arrangements and measurement results.
< MIC Single-end Input >
DSP
&
µP
0.1µ
10
0.1µ
I2C
DVDD
VSS2
VSS3
NC
Dynamic SPK
R1, R2: Short
ZD1, ZD2: Open
Piezo SPK
R1, R2: ≥10Ω
ZD1, ZD2: Required
R1
Speaker
R2 _ZD2
ZD1
SDTO
MCKO
SPN
SVDD
SPP
BICK
SDTI
MCKI
AOUT
LIN
Top View
FCK
CCLK
CDTI
MPI
MIC
PDN
CSN
TST2
VCOM
VCOC
1µ
220
1µ
2.2k
20 k
1µ
Rp Cp
0.1µ
+ _2.2µ
TST1
VSS1
AVDD
TST3
0.1µ
Analog Supply
2.2∼3.6V
+
10µ
Figure 57. Typical Connection Diagram
Notes:
- VSS1, VSS2 and VSS3 of the AK4634 should be distributed separately from the ground of external controllers.
- All digital input pins except pull-down pin should not be left floating.
- In EXT mode (PMPLL bit = “0”), Rp and Cp of the VCOC pin can be open.
- In PLL mode (PMPLL bit = “1”), Rp and Cp of the VCOC pin should be connected as shown in Table 45.
- When the AK4634 is used at master mode, FCK and BICK pins are floating before M/S bit is changed to “1”.
Therefore, a pull-up resistor with around 100Ω should be connected to LRCK and BICK pins of the AK4634.
-When AVDD, DVDD and SVDD were distributed, DVDD = 1.6 ~ 3.6 V, SVDD = 2.2 ~ 4.0 V.
Rev. 0.5
- 73 -
2007/10