AK4620A Datasheet, PDF (34/42 Pages) Asahi Kasei Microsystems – 24 BIT 192KHZ AUDIO CODEC WITH IPGA

ASAHI KASEI
[AK4620A]
SYSTEM DESIGN
Figure 14 & Figure 15 shows the system connection diagram. An evaluation board (AKD4620A) is available, which
demonstrates application circuits, the optimum layout, power supply arrangements and measurement results.
0.1u
10u
+
Rch
Input
Buffer
Lch
Input
Buffer
4.75 ∼ 5.25V
Analog Supply ⁺
10u
0.1u
Audio
DSP
1 VCOM
2 AINR+
AOUTR+ 30
Rch
LPF
AOUTR- 29
Rch Out
3 AINR-
4 AINL+
AOUTL+ 28
Lch
LPF
AOUTL- 27
Lch Out
5 AINL-
6 VREF
7 AGND
8 VA
9 ^P/S
AK4620A
DGND 26
VD 25
VT 24
0.1u 0.1u
ADMODE 23
DEM0 22
3.0 ∼ 3.6V
Digital Supply
3.0 ∼ 5.25V
Digital Supply
10 MCLK
PDN 21
11 LRCK
12 BICK
13 SDTO
DFS0 20
CSN/DIF 19
CCLK/CKS1 18
Mode
Setting/
uP
14 SDTI
15 OVFR/DZFR
CDTI/CKS0 17
OVFL/DZFL ¹⁶
330
330
33p
33p
Notes:
- AGND and DGND must be connected to the same analog ground plane.
- When AOUT+/- drives some capacitive load, some resistance should be added in series between AOUT+/- and
capacitive load.
- All digital input pins must not be left floating.
- When OVFR/DZFR pin and OVFL/DZFL pin are used, a 330Ω resistor and a 33pF capacitor should be added to
OVFR/DZFR pin and OVFL/DZFL pin to avoid the coupling from SDTO pin.
Figure 14. Typical Connection Diagram (Differential mode)
MS0368-E-00
- 34 -
2004/12