Clearly the demand for innovation in space products has never been higher. Analog Devices, Inc. has a long history in the space business of delivering the highest quality, reliability, and resilience to the damaging effects of radiation in space. Our heritage line of space products is well known in the industry to be hardened to over 100 krad, making these products suitable for the harshest orbits.
Analog Devices is well known for developing new ICs for the commercial market that enable our customers to design smaller and more efficient products. However, transitioning these to space qualified products is complex and time-consuming. The vast majority of new ICs are built on BiCOMS processes that give us the capability to combine the best of bipolar and CMOS process technology. From a radiation tolerance perspective, though, these BiCOMS devices require us to characterize and mitigate effects of both total ionizing dose (TID) as well as single event effects (SEEs). This extends the development time for new products at a time when we need to release
new products more rapidly.
Another factor driving new product development is packaging since many new products are being designed with unique packaging that enhances the performance of the commercial IC. In some cases, transitioning a commercial product to space becomes impractical when its performance is tied directly to the existing non-hermetic package. This might include issues related to additional parasitic effects that require complete new hermetic package development, costly redevelopment of post package trim, or procurement of new highly complex test systems and handlers. Whatever the issue, we offer existing commercial products that previously had no chance to transition to space products because the investment was too great to justify.
Luckily, there are other forces at work that will allow us to develop more advanced products more rapidly. The first is that the total dose radiation requirements of LEO are lower than traditional orbits, so a product that can meet 30 krad to 50 krad tolerance is acceptable. The second is a ground swell of support for the use of flying plastic encapsulated modules (PEMs) in space, an idea that until recently had been met with outright disdain from EEE parts managers and engineers. It will not be easy, but if done properly and accepted by the space community, these developments will open the door to dramatic improvements in performance, as well as reductions in size, weight, and power (SWaP) for the spacecraft.
Producing space qualified PEMs with the highest quality and reliability is crucial to our combined success. The major space agencies around the world have long had specifications for the postprocessing of PEMs to qualify them for space use. The space community has long resisted the use of PEMs due to inherent risks and uncertainties in the process, including lot traceability, validity of radiation test results, test program correlation, and lack of manufacturer warranty and support. It is costly and time consuming to do the testing and carries the risk of a lot failure leaving the designer to start the process over with a different part, add shielding, or include other mitigation techniques that add cost and weight. If we as the manufacturer offer a space qualified PEMs product, those risks are greatly reduced. It also opens up the possibility to dramatically improve the build schedule as well if the product we are offering is in stock.
To address these needs, Analog Devices is introducing a new line of commercial space products. In this line, we will offer three distinct flows targeted at differing requirements from customers depending on the quantity of satellites they will be flying. The lowest flow is intended for pure commercial space customers looking to fly high volume in space, offering special support for radiation requirements. The medium level flow is an optimized flow offering additional radiation test, screening, and lot qualification. These flows will likely satisfy the vast majority of commercial space customers.