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SI8239X Datasheet(PDF) 4 Page - Silicon Laboratories

No. de pieza SI8239X
Descripción Electrónicos  Enhanced output UVLO safety
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Fabricante Electrónico  SILABS [Silicon Laboratories]
Página de inicio  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI8239X Datasheet(HTML) 4 Page - Silicon Laboratories

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2. System Overview
The operation of an Si8239x channel is analogous to that of an optocoupler and gate driver, except an RF carrier is modulated instead
of light. This simple architecture provides a robust isolated data path and requires no special considerations or initialization at start-up.
A simplified block diagram for a single Si8239x channel is shown in the following figure.
Figure 2.1. Simplified Channel Diagram
A channel consists of an RF Transmitter and RF Receiver separated by a semiconductor-based isolation barrier. Referring to the
Transmitter, input A modulates the carrier provided by an RF oscillator using on/off keying. The Receiver contains a demodulator that
decodes the input state according to its RF energy content and applies the result to output B via the output driver. This RF on/off keying
scheme is superior to pulse code schemes as it provides best-in-class noise immunity, low power consumption, and better immunity to
magnetic fields. See the following figure for more details.
Figure 2.2. Modulation Scheme
Si8239x Data Sheet
System Overview
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.0 | 3


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