ad1859jrz Analog Devices, Inc., ad1859jrz Datasheet - Page 12

• Manufacturer Part Number: ad1859jrz
• Description: Stereo, Single-supply 18-bit Integrated Dac
• Manufacturer: Analog Devices, Inc.

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.
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.
ZR38000
ZORAN
DECODER
DSP OR
AUDIO
DECODER
DSP OR
AUDIO
(CHIP RESISTOR
Figure 15. Interface to ZR38000
(CHIP RESISTOR
PREFERRED)
SCKIN
PREFERRED)
SCKB
+5V ANALOG
WSB
SDB
12
14
13
10
9
8
+5V ANALOG
+5V DIGITAL
AV
SDATA
BLCK
30
12
14
13
10
LRCLK
IDPM0
IDPM1
18/16
9
8
23
DD
AV
+5V DIGITAL
DV
30
SDATA
BLCK
LRCLK
IDPM0
IDPM1
18/16
17
23
DD
DD
256 x F
DV
1µF
0.1µF
Figure 17. Recommended Circuit Connection (Without De-emphasis)
17
DD
Figure 18. Recommended Circuit Connection (With De-emphasis)
1µF
0.1µF
AGND
0.01µF
1µF
6
S
AGND
0.01µF
1µF
6
DGND
CDATA CCLK CLATCH
LO
LO
18
HI
20
DGND
CDATA CCLK CLATCH
µCONTROLLER
18
20
µCONTROLLER
14
13
12
10
9
8
AD1859
19
BCLK
LRCLK
SDATA
IDPM0
IDPM1
18/16
AD1859
NC
22
AD1859
NC
22
19
21
PD/RST
AD1859
21
11
PD/RST
20-64pF
µCONTROLLER
XTALI/MCLK XTALO
11
µCONTROLLER
20-64pF
XTALI/MCLK XTALO
MUTE
16
7
MUTE
27MHz
16
7
–12–
27MHz
DEEMP
15
2
DEEMP
20-64pF
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.
15
2
20-64pF
CMOUT
EMPR
FGND
OUTR
OUTL
EMPL
FILT
CMOUT
NC
NC
EMPR
C-CUBE
FGND
EMPL
OUTR
OUTL
CL480
FILT
NC
NC
28
27
24
25
26
1
5
4
3
28
27
26
24
25
1
5
4
3
1k
1k
10µF
OPTIONAL DE-EMPHASIS
CIRCUIT SHOWN
Figure 16. Interface to CL480
2.2nF
2.2nF
DA-LRCK
DA-DATA
1k
1k
10µF
DA-BCK
DA-XCK
0.1µF
2.2nF
2.2nF
10µF
470
470
33nF
33nF
10µF
NPO
NPO
0.1µF
256 x F
384 x F
OR
10µF
10µF
0.1µF
S
S
0.1µF
10M
10M
1µF
1µF
LO
LO
LO
BIAS VOLTAGE
FOR EXTERNAL USE
LEFT LINE
OUTPUT
RIGHT LINE
OUTPUT
BIAS VOLTAGE
FOR EXTERNAL USE
RIGHT LINE
OUTPUT
LEFT LINE
OUTPUT
14
13
12
10
8
9
BCLK
LRCLK
SDATA
IDPM0
IDPM1
18/16
AD1859
REV. A