Burr-Brown Corporation DEM-PCM1800 User manual

1
®
DEM-PCM1800
®
© 1997 Burr-Brown Corporation LI-502 Printed in U.S.A. November, 1997
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
BLOCK DIAGRAM
DEM-PCM1800 INSTRUCTION MANUAL
Power Supply
PCM1800
A/D
Mode Control
Switch
Digital
Inerface
Lch IN
Rch IN
DESCRIPTION
DEM-PCM1800 is an evaluation board for the
PCM1800 20-bit stereo audio analog-to-digital con-
verter. The board contains a 24-pin SSOP IC socket,
mode control switch, and some bypass capacitors.
DEM-PCM1800 can be operated by connecting only a
power supply and system clock (either of 256fSor
384fSor 512fS). There are two kinds of operation
modes: Master Mode, and Slave Mode for operation
of the PCM1800.
In Master Mode, LRCK, BCK, FSYNC, and DATA,
are outputs. In Slave Mode, DEM-PCM1800 requires
LRCK, BCK, FSYNC inputs, and outputs DATA.

2
®
DEM-PCM1800
V
IN
L
V
REF
1
SGND
V
REF
2
V
IN
R
RSTB
BYPS
FMT0
FMT1
MODE0
MODE1
FSYNC
AGND
V
CC

C
IN
PL
C
IN
NL
C
IN
PR
C
IN
NR
V
DD

DGND
SYSCK
DOUT
BCK
LRCK
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
C
12
4.7µF C
8
470pF
+
C
11
4.7µF
+
+5V
FSYNC
2
1
JP2
R
1

10kΩ
SCKI
GND
LRCK
NC
BCK
DOUT
6
5
4
3
2
1
CN3
C
4

0.1µF
+
C
3

4.7µF
CN2
V
IN
L
GND
V
IN
R
3
2
1
CN1
GND V
CC
2 1
SW1
DIPSW
SW2
PUSHSW
PUSH = OFF
U1
PCM1800
C
10
1µF
+
C
9
1µF
+
+
C
6

0.1µF
C
5

4.7µF
C
2

0.1µF
C
1

100µF
+
CN4
JP2-1 JP2-2
GND V
CC
2 1
C
7
470pF
DEM-PCM1800 BASIC CONNECTIONS
AND OPERATION
• Power supply can be provided at +VCC, GND connector
CN1.
• Audio analog inputs are VINL, VINR connector CN2.
• Digital ground return to digital interface source should be
connected at GND, connector CN3.
• System clock (either of 256fSor 384fSor 512fS) should be
provided at SCLK, connector CN3.
• Operation Mode (master mode or slave mode) and selec-
tion of system clock can be controlled by switch MODE
0, MODE 1.
• The high pass filter function can be controlled by the
switch bypass.
• Audio data format can be controlled by switch FMT0,
FMT1.
• To enable the reset function push RESET (switch SW2).
Master Mode Operation
• LRCK, BCK, DATA, are outputs for PCM Audio data.
• LRCK, BCK, DATA, outputs are located at connector
CN3.
Slave Mode Operation
• LRCK, BCK, DATA, are inputs for PCM Audio data.
Synchronized timing between LRCK (fS) and system
clock (256fS, 384fS, 512fS) is required.
• LRCK, BCK, DATA, inputs are located at connector CN3
and are selected by setting FSYNC = H connecting JP2.
SCHEMATIC DIAGRAM
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use
ofthisinformation,andalluseofsuchinformationshallbeentirelyattheuser’sownrisk.Pricesandspecificationsaresubjecttochangewithoutnotice.Nopatentrightsorlicensestoanyofthecircuits
described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

3
®
DEM-PCM1800
PCB LAYOUT