Figure 9 is the CA3306 schematic
diagram, modified a little bit from the
Figure 10 is the clock schematic
diagram; you can use any oscillator from
5 MC to 15 MC. I have even tested it out
using up to 25 MC with no problems.
However, if you try to connect it to the
Arduino clock on pins 9 or 10, the Arduino will slow
down or stop.
Once the CA3306 is wired up, you should see a
logic analyzer displaying the outputs of it. You need to
change the six lines of code for the logic analyzer back
to an oscilloscope type display like this:
u8g.drawLine (xpos, Sample[xpos], xpos+1,
If you are using a 20 KC sine wave, you will only
be seeing 1/4 of the waveform. You can slow it down
by replacing the 100 PINCs with the older data sampling
version that used a loop and PINC.
Figure 11 shows the CA3306 ADC. The clock
The CA3306 analog-to-digital converter is on the right side and the
crystal oscillator is on the left side behind the switches.
March 2014 45