AK4634EN Datasheet, PDF (76/94 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK -AMP

[AK4634]
AK4634ECB < MIC Single-end Input >
DSP
&
µP
10
0.1µ
0.1µ
I2C
DVDD
VSS2
VSS3
NC
Dynamic SPK
R1, R2: Short
ZD1, ZD2: Open
Piezo SPK
R1, R2: 10
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
0.1µ
TST3
Analog Supply
2.23.6V
+
10µ
Figure 58. Typical Connection Diagram (3-wire Mode, AK4634ECB)
Notes:
- VSS1, VSS2 and VSS3 of the AK4634 must be distributed separately from the ground of external controllers.
- All digital input pins except pull-down pin must 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 must be connected as shown in Table 4.
- 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 must 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.
-1st-oder HPF consists of the input impedance of the LIN pin and MIC pin (R = typ 30 k) and the LIN, MIC pin
capacitors “C” before MIC-Amp. The cut-off frequency of the HPF(fs) is calculated by the following formula.
fc = 1 / (2R C)
MS0686-E-03
- 76 -
2014/10