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PCM1737E/2K.B Datasheet(PDF) 25 Page - Texas Instruments

Part # PCM1737E/2K.B
Description  24-Bit, 192kHz Sampling Enhanced Multi-Level, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
PDF  32 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

PCM1737E/2K.B Datasheet(HTML) 25 Page - Texas Instruments

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PCM1737
FIGURE 15. Recommended PCB Layout.
FIGURE 16. Single-Supply PCB Layout.
Since the overall system performance is defined by the
quality of the D/A converters and their associated analog
output circuitry, high quality audio op amps are recom-
mended for the active filters. Burr-Brown’s OPA2134 and
OPA2353 dual op amps are shown in Figures 12a and 14,
and are recommended for use with the PCM1737.
PCB LAYOUT GUIDELINES
A typical PCB floor plan for the PCM1600 and PCM1601 is
shown in Figure 15. 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 PCM1737
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 perfor-
mance of the PCM1737. 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 be-
tween the analog and digital +5V supply connections to
avoid coupling of the digital switching noise into the analog
circuitry. Figure 16 shows the recommended approach for
single-supply applications.
PCM1737
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
AGND
REG
–V
S
PCM1737
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
+5VA
+V
S
AGND
REG
–V
S



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