Optocouplers are radiation-tolerant for deep space environments
Radiation-tolerant optocouplers the HCC1000x devices, support satellites, launch vehicles, spacecraft, and planetary rovers.
They use a light-sensitive interface for electrical isolation between input and output circuits. They are robust and operate well in harsh, dirty environments. The optocouplers are TID (Total Ionizing Dose) radiation tolerant to 100krad (Si), extended to 300krad, with a low dose rate (ELDRS) of 0.1rad/s and neutron exposure of 1E12 neutrons/cm, extended to 2E12 neutron/cm.
The rugged design consists of both an infra red LED and NPN silicon phototransistor, mounted in a choice of packages, either a hermetically sealed TO-78 metal can, 6pin SMD, hermetically sealed ceramic 4pin or 6pin LCC, high-voltage isolator assembly, or a custom designed package. Electrical isolation is 1kV and other optoisolator assemblies extend out to 50kV.
The HCC1000 and HCC1001 include a base supplied contact for conventional transistor biasing. The HCC1002 features a hermetically sealed ceramic LCC 4pin without base contact. There is a choice of either a high-voltage isolator assembly or custom designed package. TX and TXV processing are available to MIL-PRF-19500 conformance requirements.
The optocoupler series can also support ground loop elimination, level shifting, line receiver switching, power supply isolation, and motor control within high-voltage power systems, nuclear environments, and any other harsh industrial environment where the presence of radiation may pose added risks of electrical circuitry performance degradation, says the company.