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PCM1608Y/2K Datenblatt(PDF) 26 Page - Texas Instruments

Teilenummer PCM1608Y/2K
Bauteilbeschribung  24-Bit, 192kHz Sampling, 8-Channel, Enhanced Multilevel, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
PDF  29 Pages
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCM1608Y/2K Datenblatt(HTML) 26 Page - Texas Instruments

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PCM1608
26
SBAS164A
PCB LAYOUT GUIDELINES
A typical PCB floor plan for the PCM1608 is shown in
Figure 16. A ground plane is recommended, with the analog
and digital sections being isolated from one another using a
split or cut in the circuit board. The PCM1608 should be
oriented with the digital I/O pins facing the ground plane
split/cut to allow for short, direct connections to the digital
audio interface and control signals originating from the
digital section of the board.
Separate power supplies are recommended for the digital and
analog sections of the board. This prevents the switching noise
present on the digital supply from contaminating the analog
power supply and degrading the dynamic performance of the
DACs. In cases where a common +5V supply must be used for
the analog and digital sections, an inductance (RF choke, ferrite
bead) should be placed between the analog and digital +5V
supply connections to avoid coupling of the digital switching
noise into the analog circuitry. Figure 17 shows the recom-
mended approach for single-supply applications.
FIGURE 16. Recommended PCB Layout.
FIGURE 17. Single-Supply PCB Layout.
PCM1608
V
CC
V
DD
DGND
Return Path for Digital Signals
Analog
Ground
Digital
Ground
AGND
Output
Circuits
DIGITAL SECTION
ANALOG SECTION
Digital Logic
and
Audio
Processor
Digital Power
+V
D
DGND
Analog Power
+5V
A
+V
S
AGND
REG
–V
S
PCM1608
V
CC
V
DD
DGND
Output
Circuits
RF Choke or Ferrite Bead
Common
Ground
AGND
DIGITAL SECTION
ANALOG SECTION
V
DD
Power Supplies
+5V
+V
S
GND
REG
–V
S
Digital Logic
and
Audio
Processor



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