The OLH7100 linear optocoupler consists of two LEDs in series coupled to two PIN photodiode detectors. The photodiode on the input acts as a feedback device that permits an external feedback loop to ensure constant LED output. A similar matching photodiode on the output drives an output circuit electrically isolated from the input. A fixed relationship is maintained between the input and output, and compensates for the nonlinear, time, and temperature characteristics of the LED. Each OLH7100 is housed in an 8-pin hermetically sealed ceramic dual in-line package (DIP) with 1000 VDC electrical isolation between the input and output. Figure 1. Functional Block Diagram and Pinout OLH7100 devices are offered as unscreened as well as screened versions to customer requirements, including MIL-STD-883 Class B equivalent, MIL-PRF-19500 JAN, JANTX, JANTXV, JANS equivalent and MIL-PRF-38534 Class H, K equivalent.