The OLH7000 linear optocoupler consists of two LEDs in a series coupled to two PIN photodiode detectors.

The photodiode on the input side acts as a feedback device that permits 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 the input and output, and compensates for the LED's nonlinear, time, and temperature characteristics.

Each OLH7000 is mounted and coupled in a hermetic 8-pin ceramic dual in-line package (DIP) that provides 1000 VDC electrical isolation between the input and output.