Radiation Testing of a Flash NAND Device
Total ionizing dose and single event effects testing was performed on 4 Gb NAND flash die used in DDC’s 69F24G24 flash NAND devices. If the data is regularly refreshed, the devices show good resistance to corrupted bits during total dose irradiation. In the case of heavy ion irradiation, multi-bit upsets could prove problematic to some error correction schemes.
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SEE Testing of the 4 Gb Samsung and Spansion Flash NAND
Single event effect (SEE) testing was performed on the Samsung and Spansion 4 Gb NAND flash devices. Testing was performed up to LET = 41 MeV cm2/mg. The parts were characterized for a variety of SEE. Testing and analysis showed that MBU became more prevalent at higher LET values.
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TID Performance Degradation of High Precision, 16-bit Analog-to-Digital Converters
16-bit analog-to-digital (A/D) converters were evaluated for performance and linearity degradation due to the total dose induced shifts in the voltage reference. Test data and analysis of three A/D converters is presented.
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Proton Transport, An Examination of Model and Experimental Data For Space Environment Protons
In the last decade the space community has seen a change from the dominance of a few countries with a focus on military applications to a worldwide involvement of an increasingly commercial nature. Similarly, the components used in satellites have evolved increasingly from the traditional radiation hardened components to the use of commercial silicon electronics. Using commercial electronics requires radiation characterization and generally some form of radiation analysis and mitigation for the intended application. In this case the satellite designer is trading the known radiation tolerance characteristics of a radiation hardened IC for the higher performance and lower cost of a commercial IC.
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High-Reliability Position Control for Rugged Applications
This white paper explains motion feedback angle measurement and the methods available for high-reliability position control for rugged applications.
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Proton Cross-Sections from Heavy-Ion Data in GaAs Devices
This paper reports on the calculation of proton SEU cross section from heavy-ion data in GaAs devices. A number of different models are used, however in each, accommodations must be made to account for the fact that the density and ionization energy of GaAs differs from that of Si. Model accuracy is checked using data on proton and heavy-ion cross sections from the published literature.
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Proton Cross-Sections from Heavy-Ion Data in Deep-Submicron Technologies
This paper reports on the calculation of proton SEU cross section from heavy-ion data using a number of different models. Model accuracy is checked using data on proton
and heavy-ion cross sections from the published literature. The closed-form models developed with earlier semiconductor devices typically overestimated the proton cross section, and the difference increased with smaller feature sizes. The results emphasize that low LET heavy-ion data is crucial in determining the proton upset cross section.
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BLDC Motor Controllers...for Maximum Performance & Efficiency
Modern Brushless DC (BLDC) motor controllers that are housed in compact assemblies are ideal for integration into systems that require precision control and efficiency. This enabling technology fulfills the requirements of both simple and complex motor systems, while offering significant advantages and improving time to market.
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Radiation Performance of a Flash NOR Device
We present the results of single-event effects (SEE) and total ionizing-dose (TID) testing performed on the die used in DDC’s 56F64008 flash-NOR devices. The device was single event latchup (SEL) immune at LET=85 MeV cm2/mg. All single event functional interrupts (SEFI) observed could be cleared by resetting the part without a need for power cycling.
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How Rad Hard Do You Need? The Changing Approach To Space Parts Selection?
Space is no longer the sole domain of the world’s largest governments, where programs are funded by enormous and eternal budgets aimed at fighting the cold war. Consequently, space manufacturers around the world are faced with a requirement to build satellites that are faster, better and cheaper than those made in the past. To meet this rapidly changing market, satellite companies and component manufacturers alike have begun reshaping their product offerings. More specifically, semiconductor manufacturers have begun reinterpreting industry conventions to meet the needs of their newly redefined customer base.
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Designing A Single Board Computer For Space Using The Most Advanced Processor and Mitigation Technologies
As high-end computing becomes more of a necessity in space, there currently exists a large gap between what is available to satellite manufacturers and the state of the commercial processor industry. As a result, Data Device Corporation has developed a Super Computer for Space that utilizes the latest commercial Silicon-on-Insulator PowerPC processors and state-of-the-art memory modules to achieve space-qualified performance that is from 10 to 1000 times that of current technology. Presented is a brief synopsis of DDC’s design approach and radiation mitigation techniques and radiation test results employed on DDC’s next generation SBC.
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BLDC Motor Control in Demanding Environments
Motor drives and controllers are used in a variety of applications spanning a number of different environments. Military applications include antennas and sensor positioning, stabilized platforms, guns and cannons and turret control, ship steering/rotor control, bomb and missile fins, pumps, and simulation systems. Military and commercial aviation applications include actuators, landing gear, and emergency power units. For civil aircraft, the ongoing transition away from mechanical and hydraulic and towards “more electric” systems has increased the demand for high reliability electronic motor controllers.
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Correlation of Single-Board Computer Ground-Test Data and On-Orbit Upset Rates from the Gaia Mission
DDC SCS750 single board computers (SBC) have been operating without interruption on board the Gaia satellite since its launch in 2014.
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Performance Comparison: Solid State Power Controllers vs. Electromechanical Switching
The design of power distribution systems for modern ground and air platforms entails a number of challenges, including the needs for increased amounts of electrical power for C4I and other equipment;
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Architectual Consequences of Radiation Performance in a Flash NAND Device
Single-event effects and total ionizing-dose testing was performed on a flash NAND device. The results are presented here and the consequences for error correctio
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