An analog optoisolator uses an LED and a light-sensitive element (like a photocell or phototransistor) to transmit an analog signal across a galvanic barrier, maintaining a proportional relationship between input and output.
Special Purpose Isolators Component Intelligence
Precision isolation for non-standard feedback and signal control loops.
What are Special Purpose Isolators components?
Special purpose isolators, such as analog optocouplers (e.g., NSL series), are designed for linear signal coupling where standard digital isolators fail. They are critical in feedback loops, audio level control, and high-voltage sensing where galvanic isolation is mandatory.
How to Choose Special Purpose Isolators Components
Selection depends on the specific transfer function and linearity requirements of your signal path.
Transfer Linearity
For analog feedback, prioritize components with defined gain linearity and low harmonic distortion.
Isolation Voltage
Verify the dielectric withstand voltage matches your safety standard (e.g., UL, VDE) requirements.
Bandwidth Needs
Special purpose isolators often have limited bandwidth; ensure the device supports your signal frequency range.
Temperature Stability
Check the drift characteristics of the LED/photocell or sensor interface over your operating temperature range.
Package Constraints
Consider PCB footprint and creepage/clearance distances required for high-voltage isolation.
Popular Special Purpose Isolators Components
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| #3 |  | Special Purpose |