Datasheet

APPLICATION INFORMATION
CONNECTION DIAGRAMS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
ADR5/ADR1/RSV
MS/ADR0/RSV
MC/SCL/FMT
MD/SDA/DEMP
MODE
ZERO1
ZERO2/AMUTEO
AMUTEI
VCC2
AGND2
VOUTR
VOUTR+
-
LRCK
BCK
DIN
RST
SCKI
VDD
DGND
VCC1
VCOM
AGND1
VOUTL
VOUTL+
-
PCM1789
R
3
LPFandBuffer
PLL170x
+3.3V
+5V
0V
20
0V
3.3V
20
R
6
R
6
R
1
R
2
AudioDSP
or
Decoder
R
4
Microcontroller
or
Microprocessor
R
5
C
3
SeeTermination
CircuitOptionsBelow
C
1
LPFandBuffer
C
4
C
2
+
C
5
+
C
6
+
TerminationCircuitOptions(selectone)
3.3V
20
20
0V
POWER SUPPLY AND GROUNDING
PCM1789
SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009 .............................................................................................................................................. www.ti.com
A basic connection diagram is shown in Figure 37 , with the necessary power-supply bypassing and decoupling
components. Texas Instruments ’ PLL170X is used to generate the system clock input at SCKI, as well as to
generate the clock for the audio signal processor. The use of series resistors (22 Ω to 100 Ω ) are recommended
for SCKI, LRCK, BCK, and DIN for electromagnetic interference (EMI) reduction.
NOTE: C
1
through C
3
are 1- µ F ceramic capacitors. C
4
through C
6
are 10- µ F electrolytic capacitors. R
1
through R
4
are 22- Ω to 100- Ω
resistors. R
5
is a resistor appropriate for pull-up. R
6
is a 220-k Ω resistor, ± 5%. An appropriate resistor is required for pull-up, if
ZERO2/AMUTEO pin is used as AMUTEO.
Figure 37. Basic Connection Diagram
The PCM1789 requires +5 V for the analog supply and +3.3 V for the digital supply. The +5-V supply is used to
power the DAC analog and output filter circuitry, and the +3.3-V supply is used to power the digital filter and
serial interface circuitry. For best performance, it is recommended to use a linear regulator (such as the
REG101-5/33 , REG102-5/33 , or REG103-5/33 ) with the +5-V and +3.3-V supplies.
Five capacitors are required for supply bypassing, as shown in Figure 37 . These capacitors should be located as
close as possible to the PCM1789 package. The 10- µ F capacitors are aluminum electrolytic, while the three 1- µ F
capacitors are ceramic.
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Product Folder Link(s): PCM1789