PCM2900

PCM2902

SLES035C − MARCH 2002 − REVISED MARCH 2007

www.ti.com

26

PCM2900 TYPICAL CIRCUIT CONNECTION 1

Figure 36 illustrates a typical circuit connection for a high-performance application. The circuit illustrated is for

information only. The whole board design should be considered to meet the USB specification as a

USB-compliant product.

NOTE: C1, C2: 10 µF

C3, C4, C7, C8, C13: 1 µF (These capacitors must be less than 2 µF)

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

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

IC1: REG103xA−A (TI) or equivalent. Analog performance may vary depending on IC1.

D1: Schottky barrier diode (VF ≤ 350 mV at 10 mA, IR ≤ 2 µA at 4V)

D+

28

27

26

25

24

23

22

21

20

19

1

2

3

4

5

6

7

8

9

10

PCM2900

D−

VBUS

DGNDU

HID0

HID1

HID2

SEL0

SEL1

VCCCI

SSPND

XTI

VDDI

DGND

TEST1

TEST0

XTO

VCCP2I

AGNDX

VCCXI

D+

D−

MUTE/

Power

Down

C1

11

12

13

14

AGNDC

VINL

VINR

VCOM

18

17

16

15

VCCP1I

VOUTL

VOUTR

AGNDP

22

Ω

22

Ω

1.5 k

Ω x 3

1.5 k

Ω

GND

VBUS

C2

C9

C10

1 M

Ω

12 MHz

C5

C6

C3

C8

C11

C12

LPF,

Amp

LPF,

Amp

C7

C4

3.6 V −

3.85 V

13 k

Ω

27 k

Ω

IN

1

OUT

2

GND

3

ADJ

4

EN

5

IC1

+

+

C13

+

+

+

+

D1

2.2

Ω

1

mF

Figure 36. Bus-Powered Configuration for High-Performance Application