AK4359A AKM [Asahi Kasei Microsystems], AK4359A Datasheet - Page 31

• Manufacturer Part Number: AK4359A
• Description: 106dB 192kHz 24-Bit 8ch DAC
• Manufacturer: AKM [Asahi Kasei Microsystems]

AVSS and DVSS must be connected to the same analog ground plane.
1. Grounding and Power Supply Decoupling
AVDD and DVDD are usually supplied from analog supply in system and should be separated from system digital
supply. Alternatively if AVDD and DVDD are supplied separately, the power up sequence is not critical. AVSS and
DVSS of the AK4359A must 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 capacitor,
especially 0.1μF ceramic capacitor for high frequency should be placed as near to AVDD and DVDD as possible.
2. Analog Outputs
The analog outputs are single-ended and centered around the VCOM voltage. The output signal range is typically
3.40Vpp (typ@VDD=5V). The phase of the analog outputs can be inverted channel independently by INVL/INVR bits.
The internal switched-capacitor filter and continuous-time filter attenuate the noise generated by the delta-sigma
modulator beyond the audio passband. The input data format is two’s complement. The output voltage is positive full
scale for 7FFFFFH (@24bit) and negative full scale for 800000H (@24bit). The ideal output is VCOM voltage for
000000H (@24bit).
DC offsets on analog outputs are eliminated by AC coupling since analog outputs have DC offsets of VCOM + a few mV.
MS1010-E-01
Digital Ground
Controller
System
Figure 25. Ground Layout
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Analog Ground
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
BICK
SDTI1
LRCK
RSTB
SMUTE/CSN/CAD0
ACKS/CCLK/CSL
DFS0/CDT/SDA
SDTI2
SDTI3
SDTI4
TDM0
DEM0
DVDD
DVSS
MCLK
AK4359A
DEM1/I2
ROUT1
ROUT2
ROUT3
ROUT4
LOUT1
LOUT2
LOUT3
LOUT4
VCOM
AVDD
AVSS
DZF1
DZF2
P/S
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
[AK4359A]
2008/10