Block Diagram
1-2
1.1
Block Diagram
Figure 1−1.
DEM-PCM/DSD1792/1794 Block Diagram
DAI
CS8414
DAC
PCM1792
DSD1792
PCM1794
DSD1794
CN001
LPF
5534
SW
REG Cont
+5 V
Digital
Lch OUT
BAL OUT
(MONO)
Lch LPF
OUT
COAX IN
OPT IN
JP
Rch OUT
Rch LPF
OUT
BAL
5534
I/V
5534
I/V
5534
SW
Mode Cont
3.3 V REG
REG1117
3.3 V REG
REG1117
+5 V
Analog
−15 V
Analog
+15 V
Analog
I/V
5534
I/V
5534
BAL
5534
JP
LPF
5534
1.2
DEM-PCM/DSD1792/1794 Power Supply Connection
-
Connect the
±
15-V analog power supply to TM5 (−VA), TM6 (AGND), and
TM7 (+VA). Power supply current is typically
±
40 mA, maximum
±
70 mA.
-
Connect the 5-V DAC power supply to TM4 (+VCC) and TM3 (AGND). A
3.3-V regulator IC is connected to provide a 3.3-V power supply for the
DAC device. Power supply current is typically 50 mA, maximum 60 mA (at
f
S
= 44.1 kHz).
-
Connect the 5-V digital power supply at TM2 (+VDD) and TM1 (DGND).
A 3.3-V regulator IC is connected to provide a 3.3-V logic supply to the
digital section. Power supply current is typically 70 mA, max +120 mA.
-
Jumper JP-P is for the selection of separate 5-V +VCC and +VDD power
supplies, or a common 5-V power supply.
J
1−2: Separate power supplies
J
3−4: Common power supply; connect 5 V to either TM4 (+VCC) or TM2
(+VDD).
1.3
S/PDIF Connection
Connect the S/PDIF interface at either PJ-1 (RCA phono jack, coaxial cable)
or U001 (optical cable). The DEM-PCM/DSD1792/1794 accepts sampling
rates up to f
S
= 96 kHz at the S/PDIF interface. The optical input or coaxial
input is automatically detected by the DAI receiver. For the f
S
= 192-kHz
