P. Ostrovsky, O. Schrape, K. Tittelbach-Helmrich, F. Herzel, G. Fischer, D. Hellmann, P. Borner, A. Loose, P. Hartogh, D. Kissinger
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A Radiation Hardened 16 GS/s Arbitrary Waveform Generator IC for a Submillimeter Wave Chirp-Transform Spectrometer
This paper describes a radiation hardening design approach of a dual channel 16 GSps single chip arbitrary waveform generator (AWG) – a complex mixed-signal ASIC – that consists of a low phase noise 16 GHz PLL, two 1.6 Mbit SRAM blocks, two multiplexing chains, and two 4-bit DACs. The ASIC is dedicated to be a part of a submillimeter wave spectrometer that shall operate in deep-space environment. Under stringent power budget conditions, a selective radiation protection of the ASIC has been applied. The arbitrary waveform generator has been fabricated in a 130 nm SiGe BiCMOS process. Correct functionality has been verified in lab and will be further tested in an irradiation facility.