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

LPFandBuffer

PLL170x

+3.3V

+5V

0V

20

0V

3.3V

20

R

6

R

6

R

1

R

2

AudioDSP

or

Decoder

R

4

Microcontroller

or

Microprocessor

R

5

C

3

SeeTermination

CircuitOptionsBelow

C

1

LPFandBuffer

C

4

C

2

+

C

5

+

C

6

+

TerminationCircuitOptions(selectone)

3.3V

20

20

0V

PCM1789-Q1

SBAS546

– MARCH 2011

www.ti.com

APPLICATION INFORMATION

CONNECTION DIAGRAMS

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: C1 through C3 are 1-μF ceramic capacitors. C4 through C6 are 10-μF electrolytic capacitors. R1 through R4 are 22-Ω to 100-Ω

resistors. R5 is a resistor appropriate for pull-up. R6 is a 220-kΩ resistor, ±5%. An appropriate resistor is required for pull-up, if

ZERO2/AMUTEO pin is used as AMUTEO.

Figure 37. Basic Connection Diagram

POWER SUPPLY AND GROUNDING

The PCM1789-Q1 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-Q1 package. The 10-

μF capacitors are aluminum electrolytic, while the three

1-

μF capacitors are ceramic.

32

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Copyright

© 2011, Texas Instruments Incorporated

Product Folder Link(s): PCM1789-Q1