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Readout Electronics & Multi-Pixel Arrays

The compound Cadmium-Zinc-Telluride (CdZnTe) offers great promise for astrophysics. As crystal quality improves, the challenge for imaging array development is to derive electrode geometries and readout electronics to satisfy particular applications and to understand how the material will perform in the balloon environment. The complete detector typically has two componenets: a pixellated CdZnTe crystal and an Application Specific Integrated Circuit readout chip (ASIC).

In the pixellated configuration, the cathode is contiguous and the anode readout pads are each connected, via bonding, to a separate readout channel on a custom electronic chip resulting in a 1 to 1 correspondence between the number of readout channels and the number of pixels. Typically, the ASIC would contain the preamplifiers and pulse shapers plus a peak level detector and a multiplexing system and would have very low noise.

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