We present a new instrument composed of a large number of sub-electron noise
Skipper-CCDs operated with a two stage analog multiplexed readout scheme
suitable for scaling to thousands of channels. New, thick, 1.35 Mpix sensors,
from a new foundry, are glued into a Multi-Chip Module (MCM) printed circuit
board on a ceramic substrate which has 16 sensors each. The instrument, that
can hold up-to 16 MCMs, a total of 256 Skipper-CCD sensors (called a
Super-Module with ≈130 grams of active mass and 346 Mpix), is part
of the R&D effort of the OSCURA experiment which will have ≈94
super-modules. Experimental results with 10 MCMs and 160 Skipper-CCDs
sensors are presented in this paper. This is already the largest ever build
instrument with single electron sensitivity CCDs using nondestructive readout,
both, in terms of active mass and number of channels.Comment: Corrected minor typo