EVAL-AD7405FMCZ Datasheet, PDF (16/20 Pages) Analog Devices – Full featured evaluation board

UG-690
GENERATING A HISTOGRAM OF THE ADC CODE
DISTRIBUTION
The Histogram tab (see Figure 17) can be used to perform ac
testing or, more commonly, dc testing. This tab shows the ADC
code distribution of the input and computes the mean and
standard deviation, which are displayed as DC Offset/Mean and
Transition Noise, respectively, in the Histogram Analysis area
(labeled 2 in Figure 17).
AC Input
To perform a histogram test of ac input,
1. Apply a quality signal source to the VIN+ input on the
board.
2. Select the Histogram tab in the evaluation software main
window
3. Click the Single Capture or Continuous Capture button
(labeled 1 in Figure 17).
EVAL-AD7405FMCZ User Guide
DC Input
The histogram is more commonly used for dc testing.
To perform a histogram test of dc input,
1. Select the Histogram tab in the evaluation software main
window.
2. Click Single Capture or Continuous Capture (labeled 1 in
Figure 17).
Raw data is captured and passed to the PC for statistical
computations, and various measured values are displayed in the
Histogram Analysis area (labeled 2 in Figure 17).
1
2
Figure 17. Histogram Capture Tab
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