AK4665A Datasheet, PDF (49/52 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4665A]
SYSTEM DESIGN
Figure 27 shows the system connection diagram. An evaluation board [AKD4665A] is available which demonstrates the
optimum layout, power supply arrangements and measurement results.
Digital Ground Analog Ground
Mono
Mic In
Stereo External
Line In Analog In
Stereo
Line Out
0.1u
25 AVSS
ROUT 16
2.2u ₊
4.7u ₊
0.1u
0.1u
26 AVDD
27 VCOM
28 VREF
AK4665AEN
HPR 15
HPL 14
2.2u (+):Note
NVSS 13
Headphone
0.1u
µP
29 PDN
30 CSN
Top View
HVSS 12
HVDD 11
2
+
10u
Power Supply
2.6 ∼ 3.6V
31 CCLK
CN 10
2.2u
32 CDTI
CP
9
(+):Note
10
0.1u
+
Power Supply
DSP
1.6 ∼ 3.6V
Figure 27. Typical Connection Diagram
Note:
-
-
-
-
A 2Ω resistor must be added in series between HVDD pin and power supply line in order to
limit the current.
These capacitors at CP/CN pins and HVSS/NVSS pins require low ESR (Equivalent Series Resistance) over all
temperature range. When these capacitors are not bipolar, the positive side should be connected to CP pin and
HVSS respectively.
AVSS, DVSS and HVSS of the AK4665A should be distributed separately from the ground of external
controllers.
All digital input should not be left floating.
MS0440-E-01
- 49 -
2006/05