Avago optocouplers avago hcnr201 000e a high linearity analog optocoupler that utilises a high performance algaas led optically coupled to 2x separate but closely matched photodiodes the input photodiode may be used to monitor and regulate the led output eliminating non linearity and drift suitable for applications such as low cost analog isolation modern pbx systems industrial process controllers smps feedback loop voltage monitors medical equipment etc avago hcnr201 000e dc in pho