AK4634EN Datasheet, PDF (78/94 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK -AMP

[AK4634]
AK4634ECB < MIC differential 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
Top View
MICN
FCK
CCLK
CDTI
MPI
MICP
PDN
CSN
TST2
VCOM
VCOC
1µ
220
1µ
1k
1k
1µ
0.1µ
Rp Cp
20 k
+ _2.2µ
TST1
VSS1
AVDD
0.1µ
TST3
Analog Supply
2.23.6V
+
10µ
Figure 60. 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 MICP pin and MICN pin (R = typ 30 k) and the MICP,
MICN 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
- 78 -
2014/10