Diode Networks - Peak Atlas DCA75 Pro User Manual

Peak Atlas DCA Pro User Guide June 2019 – Rev 1.7

Diode Networks

The DCA Pro will identify multiple diode junctions
between the probes. For three terminal devices such as
SOT-23 diode networks, all three test clips must be
connected. The optional Peak Component Adapter for SOT-23 23
parts (Peak model PCA23) can be useful for testing SOT-23 parts.
The instrument will describe the type of
diode network as text and as a
component schematic symbol. Types of
diode network supported include:
Series pair, Common Cathode and
Common Anode.
It will then show the pinout and the V
F
specs for each diode in turn.
It can be seen in this example, that the blue test clip is connected to both the
anode on Diode #1 and to the cathode of Diode #2. This means that the two
diodes are effectively connected in series, with the blue clip at the mid point.
This example is illustrated below:
In the same way as the single diode analysis, the forward voltage for each
diode is measured for a nominal test current of 5mA.
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