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dc2197afa
DEMO MANUAL DC2197A
Altera C5G Board Operation
Altera’s C5G evaluation board for the Cyclone 5 GX FPGA
has an Arduino shield port that is compatible with the
DC2197A. The C5G provides 5V to the LTC2645’s VCC
supply, so IOVCC must be changed to 3.3V to match
the voltage of the digital signals coming from the FPGA.
Remove the IOVCC jumper and solder a 100Ω resistor
from the IOVCC turret post to the test point indicated in
Figure 3. Make sure gaps between connectors in the up-
per and lower rows line up properly. The upper row (JP3
and JP4 on the C5G board) will match perfectly; JP10 will
Quick start proceDure
have two empty holes on the left-hand side and JP11 will
have two empty holes on the right-hand side.
A Quartus archive project and FPGA configuration bi-
nary file are included with the DC2197A design files.
The program sends PWM signals to all four DACs. Two
quadrature numerically controlled oscillators supply data
to the PWM generator. While not normally intended for AC
signal generation, this demonstration shows the cycle by
cycle updating operation of the LTC2645. Figure 4 shows
all four DAC outputs, and Figure 5 shows the details of
the relationship between the PWM input and DAC output.
2 EMPTY
LOCATIONS
2 EMPTY
LOCATIONS
REMOVE
JUMPER
IOVCC TO
PIN 2
Figure 3. Altera C5G Connections
