Datasheet

A. Arrants 5
Troubleshooting
► The FFT plot appears abnormal...
 If you see a normal noise floor when you disconnect the signal generator from the
analog input, be sure you are not overdriving the ADC. Reduce input level if
necessary.
 In VisualAnalog, Click on the Settings button in the “Input Formatter” block. Check
that “Number Format” is set to the correct encoding (offset binary by default). Repeat
for the other channel.
 If DC Spurs appear in the “FFT” plot from VisualAnalog? See Figure 2.
Figure 2: DC Spurs on FFT
Add a ferrite core to ALL switching power supplies used in the evaluation platform,
like Digi-Key Part number: 240-2287-ND (M/N: LFB360230-300). See Figure 3.
DC Spurs