The CSL400D optocoupler consists of one LED that is optically coupled to two matched photodiode detectors. Photodiode detectors are used for excellent linearity. A fixed relationship is maintained between input and output.
The photodiode on the input side acts as a feedback device that permits an external feedback loop to ensure constant LED light output. A matching photodiode on the output side is used to drive an output circuit that is electrically isolated from the input.
Each CSL400D is mounted and coupled in an 8 Pin Dip ceramic package, that provides 1,500 VDC electrical isolation between the input and output.
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