REV. A

–12–

AD1859

Figure 15 shows the suggested interface to the Zoran ZR38000

DSP chip, which can act as an MPEG audio or AC-3 audio

decoder. The ZR38000 supports 16 bits of data using a left-

justified output format.

ZORAN

ZR38000

LO

AD1859

13

14

8

9

10

12

HI

LO

BCLK

LRCLK

SDATA

IDPM0

IDPM1

18/16

SCKB

WSB

SDB

SCKIN

Figure 15. Interface to ZR38000

Figure 16 shows the suggested interface to the C-Cube

Microsystems CL480 MPEG system decoder IC. The CL480

supports 16 bits of data using a right-justified output format.

C-CUBE

CL480

LO

AD1859

13

14

8

9

10

12

LO

LO

BCLK

LRCLK

SDATA

IDPM0

IDPM1

18/16

DA-BCK

DA-LRCK

DA-DATA

DA-XCK

OR

Figure 16. Interface to CL480

Layout and Decoupling Considerations

The recommended decoupling, bypass circuits for the AD1859

are shown in Figure 17. Figure 17 illustrates a connection dia-

gram for systems which do not require de-emphasis support.

The recommended circuit connection for system including de-

emphasis is shown in Figure 18.

AD1859

10µF

0.1µF

BIAS VOLTAGE

FOR EXTERNAL USE

1k

Ω

2.2nF

LEFT LINE

OUTPUT

RIGHT LINE

OUTPUT

10µF

20-64pF

20-64pF

27MHz

XTALI/MCLK

XTALO

CDATA CCLK CLATCH

+5V ANALOG

0.1µF

1µF

AGND

SDATA

BLCK

LRCLK

IDPM0

IDPM1

18/16

10

8

9

12

13

14

DSP OR

AUDIO

DECODER

PD/RST

MUTE

DEEMP

+5V DIGITAL

DGND

FILT

CMOUT

OUTL

EMPL

OUTR

EMPR

AD1859

10µF

2

6

7

15

11

20

16

19

21

22

23

µCONTROLLER

28

24

25

26

27

5

3

NC

NC

FGND

1k

Ω

2.2nF

10µF

µCONTROLLER

NC

0.01µF

1µF

17

18

4

1

0.1µF

30

Ω

(CHIP RESISTOR

PREFERRED)

Figure 17. Recommended Circuit Connection (Without De-emphasis)

BIAS VOLTAGE

FOR EXTERNAL USE

1k

Ω

LEFT LINE

OUTPUT

RIGHT LINE

OUTPUT

1µF

10µF

1k

Ω

1µF

470

Ω

33nF

NPO

470

Ω

OPTIONAL DE-EMPHASIS

CIRCUIT SHOWN

10µF

0.1µF

20-64pF

20-64pF

27MHz

XTALI/MCLK

XTALO

CDATA CCLK CLATCH

+5V ANALOG

0.1µF

1µF

AGND

SDATA

BLCK

LRCLK

IDPM0

IDPM1

18/16

10

8

9

12

13

14

DSP OR

AUDIO

DECODER

PD/RST

MUTE

DEEMP

+5V DIGITAL

DGND

FILT

CMOUT

OUTL

EMPL

OUTR

EMPR

AD1859

2

6

7

15

11

20

16

19

21

22

23

24

27

5

NC

NC

FGND

µCONTROLLER

NC

0.01µF

1µF

17

18

4

1

26

3

25

28

0.1µF

10M

Ω

10M

Ω

2.2nF

2.2nF

30

Ω

(CHIP RESISTOR

PREFERRED)

33nF

NPO

µCONTROLLER

Figure 18. Recommended Circuit Connection (With De-emphasis)