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Linear

Linear optocouplers consist of one LED optically coupled to two matched photodiode detectors. Photodiode detectors are used for excellent linearity. The photodiode on the input side acts as a feedback device permitting an external feedback loop to ensure constant LED light output. A similar matching photodiode on the output side is used to drive an output circuit that is electrically isolated from the input. A fixed relationship is thus maintained between input and output.

Packaging Description Product Datasheet
Packaging Hermetic Surface Mount - 6 pin LCC 1 2 OLS700 PDF
Packaging Hermetic - 8 pin dip 1 2 OLH7000 PDF

Footnotes:
1 For solder dip, add "-1".
2 For tape and reel, add "-2". For solder dip & tape and reel , add "-3".