Gallium-arsenide photodetective assemblies of the UV range for multispectral optoelectronic systems V. N. Legky, B. V. Galun, M. V. Kiselev Novosibirsk State Technical University, 20 Marx av., Novosibirsk, 630092, Russia E-mail: sniios@mail.ru O. P. Tolbanov, D. Yu. <...> Mokeev, A. V. Tyazhev Tomsk State University, 36 Lenin av., Tomsk, 634050, Russia The UV range gallium-arsenide PDA prototype has been investigated in this work. <...> A laboratory test obtained high grade of the PDA current sensitivity in the 220—320 nm range. <...>