PD
Photodiode
A photodiode is a light-sensitive semiconductor device used in a documented sensing circuit.
Schematic
Symbols · OPTO-PD
Photodiode optocoupler
An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.
Schematic · OPTO-PD
What it represents
An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.
On a schematic, identify the emitter drive, detector terminals and feedback/output channels and trace the isolated analogue signal and amplifier circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.
The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing.
How to read it
- Identify the emitter drive, detector terminals and feedback/output channels.
- Trace the isolated analogue signal and amplifier circuit.
Information to show or reference
- Label the emitter drive, detector terminals and feedback/output channels.
- Cross-reference the isolated analogue signal and amplifier circuit.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.
A distinction that matters
A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
IL300 linear photodiode optocoupler documentation
Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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