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Proceedings Paper

A 20MHz 15µm pitch 128x128 CTIA ROIC for InGaAs focal plane array
Author(s): Zhangcheng Huang; Yu Chen; Songlei Huang; Jiaxiong Fang
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Paper Abstract

A 128×128 matrix readout integrated circuit (ROIC) for 15×15 μm2 InGaAs focal plane array (FPA) is reported in this paper. Capacitive-feedback Trans-Impedance Amplifier (CTIA) and correlated double sampling (CDS) are both involved in ROIC pixel which dissipates 90nW and has a full-well-capacity (FWC) of about 78,000 e-. Noises of ROIC pixel are analyzed and distribution method of capacitors in pixel is discussed in order to obtain low-noise performance. In column buffer circuit, a new pre-charging technique is developed to realize readout rate of 20 MHz with low power consumption. The ROIC is fabricated with 0.18-μm 3.3 V mixed signal CMOS process. Test results show that the ROIC has an equivalent input noise of about 181e- and can achieve a readout rate of 20 MHz.

Paper Details

Date Published: 11 November 2014
PDF: 7 pages
Proc. SPIE 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III, 92750T (11 November 2014); doi: 10.1117/12.2074196
Show Author Affiliations
Zhangcheng Huang, Shanghai Institute of Technical Physics (China)
Yu Chen, Shanghai Institute of Technical Physics (China)
Songlei Huang, Shanghai Institute of Technical Physics (China)
Jiaxiong Fang, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 9275:
Infrared, Millimeter-Wave, and Terahertz Technologies III
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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