ak4528 AKM Semiconductor, Inc., ak4528 Datasheet - Page 24

• Manufacturer Part Number: ak4528
• Description: High Performance 24bit 96khz Audio Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Figure 11 shows the system connection diagram. An evaluation board (AKD4528) is available which demonstrates
application circuits, the optimum layout, power supply arrangements and measurement results.
Notes:
1. Grounding and Power Supply Decoupling
The AK4528 requires careful attention to power supply and grounding arrangements. VA and VD are usually supplied
from analog supply in system. Alternatively if VA and VD are supplied separately, the power up sequence is taken care.
VT is a power supply pin to interface with the external ICs and is supplied from digital supply in system. AGND and
DGND of the AK4528 should be connected to analog ground plane. System analog ground and digital ground should be
connected together near to where the supplies are brought onto the printed circuit board. Decoupling capacitors should be
as near to the AK4528 as possible, with the small value ceramic capacitor being the nearest.
MS0011-E-01
4.75 ∼ 5.25V
Analog Supply
Audio
Controller
Rch
Input
Buffer
Lch
Input
Buffer
- AGND and DGND of AK4528 should be distributed separately from the ground of external controller etc.
- When AOUT+/− drives some capacitive load, some resistor should be added in series between AOUT+/− and
- All input pins should not be left floating.
capacitive load.
10u
+
0.1u
0.1u
+
2.2u
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCOM
AINR+
AINR-
AINL+
AINL-
VREF
AGND
VA
P/S
MCLK
LRCK
BICK
SDTO
SDTI
Figure 11. Typical Connection Diagram
SYSTEM DESIGN
AK4528
- 24 -
CCLK/CKS1
CDTI/CKS0
AOUTR+
AOUTR-
AOUTL+
AOUTL-
DGND
VD
VT
DEM1
DEM0
PDN
DFS
CSN/DIF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.1u
0.1u
Rch
LPF
Lch
LPF
Mode
Setting
2.7 ∼ 5.25V
Digital Supply
5
Rch Out
Lch Out
[AK4528]
2004/01