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4.2
Power-saving Isolation with Optocouplers
4.2.1
Internal Pulse Duration Modulator
Description of the Signal Shaping in the Modulator
In Galvanic Isolation Mode (GIM = H), the PD modulator converts the serial signal
to be transferred into a duration modulated pulse train in which the rising edge of
the send signal is assigned a long pulse and the falling edge a short pulse. A long
and a short pulse are also generated with the edges of the static associated signal
and added to the pulse train of the data signal. The total signal generated in this
way is used to drive the LED of an optocoupler.
Design Example
SIM 1-2
C79000-G8976-C215-01
Application Examples
47
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