28

27

26

25

24

23

22

21

20

19

1

2

3

4

5

6

7

8

9

10

SSPND

XTI

V

DD

DGND

DOUT

DIN

XTO

V

CCP2

AGNDX

V

CCX

D+

D–

MUTE/

Power Down

C

1

11

12

13

14

D+

D-

V

BUS

DGNDU

HID0

HID1

HID2

SEL0

SEL1

V

CCC

AGNDC

V L

IN

V R

IN

V

COM

18

17

16

15

V

CCP1

V

L

OUT

V

R

OUT

AGNDP

22 W

22 W

V

(3.3 V)

DD

1.5 k

3

W ×

IC1

1.5 kW

GND

V

BUS

1 MW

C

2

C

9

C

10

V

(3.3 V)

CC

1 MW

12 MHz

C

5

C

6

C

3

C

4

C

7

C

8

C

11

C

12

LPF,

Amp

LPF,

Amp

PCM2903C

SBFS038A – JUNE 2012 – REVISED SEPTEMBER 2015

www.ti.com

10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

10.1 Application Information

The VBUS allows the device to know when it has been plugged to a USB connection port. The SSPND’ flag will

notify when the USB input is idle for at least 5ms; this flag can be used to control or notify subsequent circuits.

More functional details can be found on Interface Sequence.

10.2 Typical Application

Figure 41 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information

only. The entire board design should be considered to meet the USB specification as a USB-compliant product.

NOTE: IC1 must be driven by VDD with a 5-V tolerant input.

C1, C2, C3, C4, C7, C8: 10 μF

C5, C6: 10 pF to 33 pF (depending on crystal resonator)

C9, C10, C11, C12: The capacitance may vary depending on design.

Figure 41. Self-Powered Configuration

10.2.1 Design Requirements

For this example, Table 6 lists the design parameters.

Table 6. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage range

3 V to 3.6 V

Current

50 mA to 70 mA

Input clock frequency

11.994 MHz to 12.006 MHz

24

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