AK4342 Datasheet, PDF (39/43 Pages) Asahi Kasei Microsystems – 24-Bit Stereo DAC with HP-AMP & 2V Line-Out

ASAHI KASEI
[AK4342]
SYSTEM DESIGN
Figure 32 shows the system connection diagram. An evaluation board [AKD4342] is available which demonstrates the
optimum layout, power supply arrangements and measurement results.
Analog Input
Lineout
Aux-out
Power Supply ^10u
2.7 ∼ 3.6V ⁺
0.1u
Power Supply
1.6 ∼ 3.6V
1u
0.1u
2.2u ⁺ 0.1u
0.1u
+
10u 0.1u
25 MUTET
26 VCOM
27 AVDD
28 AVSS
29 DVSS
30 DVDD
31 TVDD
32 I2C
Digital Ground Analog Ground
AK4342EN
Top View
HPR 16
HPL 15
HVEE 14
PVEE 13
PVSS 12
PVDD 11
CN 10
CP
9
2.2u
(+):Note
Headphone
0.1u
2.2u
(+):Note
µP
DSP
Figure 32. Typical Connection Diagram in 3-wire mode
Note:
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A 2Ω resistor should be added in series between HVDD/PVDD pins and power supply line in
order to limit the current.
These capacitors should use low ESR (Equivalent Series Resistance) over all temperature range. When these
capacitors are not bipolar, the positive side should be connected CP pin or analog ground.
AVSS, DVSS, PVSS and HVSS of the AK4342 should be distributed separately from the ground of external
controllers.
All digital input except for pull-up pins should not be left floating.
If TVDD voltage is the same as DVDD voltage, TVDD pin is directly connected to DVDD pin and the capacitor
(10µF and 0.1µF) connected to TVDD pin can be removed.
MS0506-E-02
- 39 -
2006/07