Texas Instruments DEM-DAI1802, Руководство пользователя

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Block Diagram
1-2
1.1 Block Diagram
Figure 1–1. DEM-DAI1802 Block Diagram
Format Control
ADC
PCM1802
+5V
–15V
SW051
OPT
COAX
JUMPER
+5 V
External–I/F
(CN002)
R–ch
L–ch
L/R–ch
FSYNC
BCLK
SCLK
DOUT
LRCK
24.576 MHz
DIT
CS8404
and
Logic
DAI
(BUS)
Select
and
Divider
3.3 V
REG.
+VDD GND
GND
GND
+15V
Sel.
For 2VRMS Input
–6 dB Amp.
and
2nd-Order LPF
OPA2134
R–ch
L–ch
1.2 DEM-DAI1802 Basic Connection and Operation
-
Connect the 5.0-V and
±
15-V power supplies to the V
CC
, AV
CC
, –AV
CC
,
and GND on connectors CN051–CN055. The
±
15-V supplies are required
only for 2-V RMS input.
-
Connect the S/PDIF output to CN003 (COAX) or U001 (OPT).
-
Ensure the presence of a system clock, supplied from the onboard
oscillator or external input clock connector (CN001) through
switch/jumper to PCM1802.
-
Set the data format using SW001, JP003, and SW051.
-
Select the master or slave mode using SW002, SW051, JP002, JP004,
and JP052.
1.2.1 Configuration Controls
Table 1–1. Analog Input Selection (JP101/102)—CN101/102 for 2 V RMS,
CN103/104 for 1 V RMS
Input Jumper-Pin Position
1-V RMS Direct-IN
2-V RMS –6dB/LPF
Table 1–2. PCM1802: HPF Bypass Control (SW051)
HPF Bypass BYPAS (SW051)
Enable H
Disable L