AK4636 Datasheet, PDF (85/105 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4636]
SYSTEM DESIGN
Figure 66 ~ Figure 69 show the system connection diagram. The evaluation board [AKD4636] demonstrates the optimum
layout, power supply arrangements and measurement results.
< MIC Single-end Input >
AK4636ECB
Digital
Ground
Analog
Ground
10
0.1µ
0.1µ
Speaker
PDN
DVDD
VSS2
SPP
SVDD
DSP
&
µP
SDTO
MCKO
SDTI
VSS3
SPN
BICK
MCKI
FCK
AOUT
Top View
BEEP
CCLK
CDTIO
I2C
MIC
LIN
1µ ²²⁰
Ri
Ci
C
C
20 k
0.1µ
75
CSN
VOUT
VVDD
VCOM
MPI
2.2k
VIN
VSS1
AVDD
VCOC
Rp Cp
0.1µ 0.1µ
0.1µ
+ _2.2µ
Analog Supply
2.8∼3.6V
+
10µ
Figure 66. Typical Connection Diagram (3-wire Mode, I2C pin = “L”, BPM1-0 bits = “10”)
Notes:
- VSS1, VSS2 and VSS3 of the AK4636 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 4.
- When the AK4636 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 FCK and BICK pins of the AK4636.
-When AVDD, DVDD, SVDD and VVDD were distributed, AVDD = 2.6 ~ 3.6V, DVDD = 1.6 ~ 3.6V, SVDD
= 2.6 ~ 3.6V, VVDD = 2.8 ~ 3.6V.
-1st-oder HPF consists of the input impedance of the LIN pin and MIN pin (R = typ 30 kΩ) and the LIN, MIN pin
capacitors “C” before MIC-Amp. The cut-off frequency of the HPF(fs) is calculated by the following formula.
fc = 1 / (2πR C)
MS1012-E-01
- 85 -
2010/08