AK4634EN Datasheet, PDF (77/94 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK -AMP

AK4634EN < MIC differential Input >
[AK4634]
Power Supply
2.2  3.6V
10u
Speaker
R2
10
0.1u
0.1u
Dynamic SPK
R1, R2: Short
ZD1, ZD2: Open
Piezo SPK
R1, R2: 10
ZD1, ZD2: Required
AOUT
LIN
1k
MICP
2.2u
0.1u
R1
200 1u
1u
1u
1k
Cp Rp
25 SPP
26 SVDD
27 AOUT
28 LIN/MICN
29 MIC/MICP
30 MPI
31 VCOM
32 VCOC
AK4634
Top View
SDTO 16
SDTI 15
BICK 14
MCKI 13
FCK 12
CCLK/SCL 11
CDTIO 10
PDN 9
DSP
&
P
0.1u
Analog Ground Digital Ground
Figure 59. Typical Connection Diagram (3-wire Mode, AK4634EN)
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 should 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
- 77 -
2014/10