VINL

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

PCM1802

VINR

VREF1

VREF2

VCC

AGND

PDWN

BYPAS

FSYNC

LRCK

MODE1

DGND

MODE0

FMT1

FMT0

OSR

DOUT

BCK

VDD

SCKI

+

Oversampling

System Clock

L-Ch IN

R-Ch IN

0 V

5 V

C4(2)

C5(3)

Power Down

LCF Bypass

Control

+

C3(2)

L/R Clock

Frame Sync.

Audio Data

Processor

Mode [1:0]

Format [1:0]

3.3 V

0 V

Data Clock

Data Out

C1(1)

C2(1)

Control

C6(4)

R1(5)

S0026-02

+

+

+

+

Copyright © 2016, Texas Instruments Incorporated

22

PCM1802

SLES023D – DECEMBER 2001 – REVISED DECEMBER 2016

www.ti.com

Product Folder Links: PCM1802

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Copyright © 2001–2016, Texas Instruments Incorporated

8 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.

8.1 Application Information

The PCM1802 device is suitable for wide variety of cost-sensitive consumer applications requiring good

performance and operation with a 5-V analog supply and 3.3-V digital supply.

8.2 Typical Application

Figure 28 illustrates a typical circuit connection diagram in which the cutoff frequency of the input HPF is about

8 Hz.

(1)

C1, C2: A 1-µF capacitor gives a 8-Hz (τ = 1 µF × 20 kΩ) cutoff frequency for input HPF in normal operation and

requires a power-on settling time with a 20-ms time constant during the power-on initialization period.

(2)

C3, C4: Bypass capacitors, 0.1-µF ceramic and 10-µF tantalum, depending on layout and power supply

(3)

C5: TI recommends 0.1-µF ceramic and 10-µF tantalum capacitors.

(4)

C6: TI recommends 0.1-µF ceramic and 10-µF tantalum capacitors when using a noisy analog power supply. These

capacitor are not required for a clean analog supply.

(5)

R1: TI recommends a 1-kΩ resistor when using a noisy analog power supply. This resistor is shorted for a clean

analog supply.

Figure 28. Typical Circuit Connection