VERITAS 2.2: a low noise source follower and drain current readout integrated circuit for the wide field imager on the Athena x-ray satellite

Sven Herrmann; Anna Koch; Sara Obergassel; Wolfgang Treberspurg; Michael Bonholzer; Norbert Meidinger

doi:10.1117/12.2314335

12 July 2018 VERITAS 2.2: a low noise source follower and drain current readout integrated circuit for the wide field imager on the Athena x-ray satellite

Sven Herrmann, Anna Koch, Sara Obergassel, Wolfgang Treberspurg, Michael Bonholzer, Norbert Meidinger

Author Affiliations +

Proceedings Volume 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII; 1070935 (2018) https://doi.org/10.1117/12.2314335
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

VERITAS 2.2 is an evolutionary step of the VERITAS readout integrated circuit (ROIC) architecture designed for high speed, low noise DEPFET source follower or drain readout for the Wide Field Imager on the Athena X-ray satellite. Drain readout, also known as current readout, mitigates the RC time of the classical source follower readout. This is particularly beneficial for large DEPFET detectors where the line capacitance is large, with the current measured at the drain of the DEPFET transistor providing an immediate signal proportional to the collected charge in the pixel. VERITAS 2.2 is designed to address the implementation challenges of drain readout and deliver consistent performance at short processing time (2.5 μs) with a system noise better than 3 e - .

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Sven Herrmann, Anna Koch, Sara Obergassel, Wolfgang Treberspurg, Michael Bonholzer, and Norbert Meidinger "VERITAS 2.2: a low noise source follower and drain current readout integrated circuit for the wide field imager on the Athena x-ray satellite", Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 1070935 (12 July 2018); https://doi.org/10.1117/12.2314335

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