AK8157A Datasheet, PDF (23/26 Pages) Asahi Kasei Microsystems – Multiclock Generator for Premium Audio Device

[AK8157A]
The AK8157A is recommended to use with a premium DAC, the AK4490. Circuits for a high quality
premium audio solution are shown as below.
In this circuit, a 9.6MHz external clock is input to the AK8157A. MCLK, BCLK and LRCK are generated by
the AK8157A. SDATA for the AK4490 is output from the external DSP in synchronization with BCLK and
LRCK.
VDD1.8V ground
9.6MHz
DSP
Micro-
Controller
0.1u
D
CLKIN
1
0.1u
0.1u 2
VSS1
C
CAD0
SCL
VDD2
SDA
3
B
VDD1
LRCK
RSTN
A
MCLK
VSS3
VDD4
CAD1
4
VDD3
VSS2
BCLK
0.1u
0.1u
Digital
1.8V
Digital
1.8V
Digital
3.3V
Analog 3.3V
10u 10u
10u
0.1u ^0.1u
0.1u
10u 10u
0.1u
Analog 5.0V
1 NC
2 NC
3 PDN
4 BICK
5 SDATA
6 LRCK
7 WCK
8 SMUTE
9 SCL
10 SDA
11 ^DIF0
12 DIF1
AOUTLP 36
AOUTLN 35
VDDL 34 _{0.1u 10u}
VDDL 33
+
VSSL 32
VSSL 31
VSSR 30
N
VSSR
0.1u 10u
29
VDDR 28
+
VDDR 27
AOUTRN 26
AOUTRP 25
Lch
LPF
Rch
LPF
Digital
ground
Digital
1.8V
Digital
Ground
0.1u
10u 10u
Analog ground
Analog
Ground
+
Electrolytic Capacitor
Ceramic Capacitor
Figure 21. High Quality Premium Audio Solution of the AK4490 with the AK8157A
015002776-E-00
- 23 -
2015/03