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Proceedings Paper

Testing of the SB349: a 32x32 CTIA readout multiplexer for far-IR focal-plane arrays
Author(s): David L. Sisson; Jam Farhoomand; Jeffrey W. Beeman; Dzung Hoang
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Paper Abstract

The SB349 is a 32x32 readout multiplexer specifically designed for far IR photodetectors and is capable of operating at cryogenic temperatures at least as low as 1.8K. This readout is a capacitive-transimpedance amplifier multiplexed to eight outputs and is buttable on two sides to form a 64x64 mosaic array. It features eight selectable gain settings, auto zero for better input uniformity, sample-and-hold circuitry, and provisions to block the readout glow. A special, 2-micron cryo-CMOS process was adopted to prevent freeze out and ensure low noise and proper operation at deep cryogenic temperatures. An overview of the design and the results of the tests performed on this device are reported in this paper.

Paper Details

Date Published: 21 July 2008
PDF: 8 pages
Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70202P (21 July 2008); doi: 10.1117/12.789582
Show Author Affiliations
David L. Sisson, TechnoScience Corp. (United States)
NASA Ames Research Ctr. (United States)
Jam Farhoomand, TechnoScience Corp. (United States)
NASA Ames Research Ctr. (United States)
Jeffrey W. Beeman, TechnoScience Corp. (United States)
Lawrence Berkeley National Lab. (United States)
Dzung Hoang, NASA Ames Research Ctr. (United States)
Enterprise Advisory Services, Inc. (United States)


Published in SPIE Proceedings Vol. 7020:
Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV
William D. Duncan; Wayne S. Holland; Stafford Withington; Jonas Zmuidzinas, Editor(s)

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