1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

32

9

31

10

30

11

29

12

28

13

27

14

26

15

25

16

PGND

V

CCP

(3)

HOST

(2)

FUNC3

FUNC0

HID0/MS

HID1/MC

HID2/MD

V

BUS

D+

D-

V

DD

DGND

FUNC1

FUNC2

DOUT

PCM2707CPJT

+

C

5

C

3

C

4

C

6

SUSPEND

R

1

R

4

R

3

R

12

R

2

(3)

R

5

C

2

C

7

X

1

C

1

GND

USB ‘B’

Connector

D-

D+

V

BUS

(3)

+

C

8

+

C

9

R

10

R

11

R

6

C

11

C

10

R

7

R

8

R

9

Headphone

Power

3.3 V

GND

TAS300x

(4)

2

I S I/F

Audio Device

DIN

LRCK

MS

MC

MD

BCK

SYSTEM CLOCK

DOUT

(3)

PCM2704C, PCM2705C, PCM2706C, PCM2707C

www.ti.com

SBFS036B – MAY 2015 – REVISED AUGUST 2015

10.2.3 Typical Circuit Connection 3: DSP Surround Processing Amplifier

Figure 37 shows a typical circuit connection for an I2S- and SPI-enabled self-powered application.

NOTE: X1: 12-MHz crystal resonator. C1, C2: 10- to 33-pF capacitors (depending on load capacitance of crystal resonator). C3, C4: 1-μF

ceramic capacitors. C5, C7: 0.1-μF ceramic capacitor and 10-μF electrolytic capacitor. C6: 10-μF electrolytic capacitors. C8, C9: 100-μF

electrolytic capacitors (depending on required frequency response). C10, C11: 0.022-μF ceramic capacitors. R1, R12: 1-MΩ resistors. R2, R5:

1.5-k

Ω resistors. R3, R4: 22-Ω resistors. R6, R7: 16-Ω resistors. R8to R11: 3.3-kΩ resistors.

(1) Output impedance of VOUTL and VOUTR during suspend mode or lack of power supply is 26 kΩ ±20%, which is the discharge path for C8

and C9.

(2) Descriptor programming through SPI is only available when PSEL and HOST are high.

(3) D+ pullup must not be activated (high: 3.3 V) while the device is detached from USB or power supply is not applied on VDD and VCCx.

VBUS of USB (5 V) can be used to detect USB power status.

(4) MS must be high until the PCM2707C power supply is ready and the SPI host (the DSP) is ready to send data. Also, the SPI host must

handle the D+ pullup if the descriptor is programmed through the SPI. D+ pullup must not be activated (high = 3.3 V) before programming of

the PCM2707C through the SPI is complete.

Figure 37. Self-Powered Application

NOTE

The circuit shown in Figure 37 is for information only. The entire board design should be

considered to meet the USB specification as a USB-compliant product.

Copyright © 2015, Texas Instruments Incorporated

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Product Folder Links: PCM2704C PCM2705C PCM2706C PCM2707C