Characterization Of Two Related Commercial Analog-to-Digital Converters: TheAD872 and AD872A from Analog Devices, Inc

摘要

The purpose of these tests was to evaluate the dose rate and total dosesusceptibility of the AD872 and AD872A Analog to Digital Converters (ADCs). The Advanced Technology Division of NSWC Crane tested the AD 872 in both total dose and dose rate ionizing radiation environments. The AD872A was tested in the total dose environment. The results are contained in this report. This experiment was funded by the PMA-Ai 151 program of the U.S. Army Missile Defense, Space and Technology Center (USAMDSTC), in Huntsville Alabama. The AD872 and AD872A are closely related Analog-to-Digital Converters, manufactured by Analog Devices, Inc. (ADI) on their commercial ABCMOS technology. The AD872A is an improved-performance version of the AD872. The AD872 and AD872A are 12-bit, 10 Million-Samples-Per-Second (MSPS) monolithic converters and share an identical architecture and many internal design features with the radiation-hardened AD9872 ADC built on the hardened RBCMOS technology. Both commercial ADCs, and the hardened ADC share a 4-stage feed-forward series/parallel architecture, as described in section 1.3.2. Because of the shared design features of these devices, the commercial ADC should exhibit radiation characteristics better than most commercial devices, and thus be a prime candidate for the sub-elements of National Missile Defense (NMD), and Theater Missile Defense (TMD) which must operate in a radiation environment. The sub-elements which must withstand more rigorous radiation requirements should find the radiation-hardened AD9872 a strong candidate for these applications. Current plans call for comprehensive radiation testing of the AD9872 during FY95.