Aerospace is one of the most demanding technology sectors on Earth. Aircraft avionics, flight control systems, inertial navigation units, and communication systems must operate flawlessly across extreme temperature ranges, high altitudes, and mission profiles spanning decades. The consequences of failure are severe and can threaten not only mission success but also human life. This uncompromising demand for reliability and longevity has made application-specific integrated circuits (ASICs) indispensable in modern aerospace systems. A fighter aircraft, for instance, relies on upwards of 5,000 chips to function. This means that component reliability and supply security are mission-critical concerns.
This article explores why ASICs have become the technology of choice for aerospace design, how they deliver the performance and reliability margins that mission-critical systems demand, and why supply security and design longevity matter as much as raw performance.
Why aerospace demands custom IC solutions
Aerospace systems operate under constraints that have no parallel in consumer or even most industrial applications. Environmental extremes, regulatory compliance, supply chain resilience, and the long service life of aircraft create a set of engineering challenges that standard, off-the-shelf components are not designed to meet.
Mission-critical reliability requirements
In automotive and industrial sectors, product failure triggers a warranty claim and customer frustration. In aerospace, it risks human life. This fundamental difference shapes every design decision. An ASIC tailored for a specific aerospace application can be optimised for the exact operating envelope that system will encounter: temperature range, altitude, vibration profile, and electromagnetic environment.
A general-purpose processor or standard sensor interface IC is often not engineered to operate reliably across the extreme temperature ranges, electromagnetic interference, vibration, and altitude extremes that aerospace systems demand. A custom IC design, by contrast, can be engineered specifically for those conditions. This is because a custom IC design allows engineers to eliminate unnecessary functionality, reduce system complexity, and ensure every design decision can be justified by rigorous analysis and testing. This disciplined approach to design is a hallmark of aerospace engineering, and it is one reason why ASICs have become so prevalent in flight-critical and mission-critical systems.
Extreme environmental performance
Aerospace systems face temperature extremes from −55 °C on high-altitude missions to +175 °C in engine-bay environments. Power-supply transients, electromagnetic interference (EMI) from high-power radar and communication systems, vibration across multiple frequency bands, and pressure variations all demand careful engineering.
An ASIC designed specifically for an aerospace application can be characterised and qualified across its actual operating envelope. Analogue circuit design (such as precision oscillators, voltage references, amplifiers, and sensor interfaces) can be tailored to maintain performance across the full temperature range without the frequency drift, gain drift, or noise floor degradation that might affect a general-purpose part. Digital logic can be hardened against single-event effects (SEE) and configured to detect and recover from transient upsets. Power distribution and thermal design can be optimised for the specific application.
Supply chain longevity and obsolescence management
Modern aircraft have a service life of 20-30+ years. The avionics, flight control systems, and sensor interfaces installed on day one must remain in production, available for spares and system upgrades, for the entire aircraft lifetime. This is a commercial and logistical challenge that off-the-shelf components struggle to guarantee.
A semiconductor supplier may discontinue a standard product after 5-10 years to focus on next-generation alternatives. When that happens, an aircraft operator is faced with a costly redesign or supply chain workaround. By contrast, an ASIC partner committed to long-term customer relationships will proactively manage supply assurance throughout the product’s lifecycle. While discontinuation can eventually become unavoidable when the underlying process technology reaches the end of its own life, a good ASIC supplier will support customers through that transition with structured options. This can include extended last-time buys and process transfers to proven alternative nodes. This proactive approach reduces the risk of obsolescence impact and provides far greater supply security and design stability than off-the-shelf components, where suppliers often discontinue products with minimal notice and little customer support. For aerospace programmes, this structured management of end-of-life is an essential business advantage.
ASIC applications in aerospace systems
ASICs are deployed across a wide range of aerospace functions. The following represent some of the most common and strategically important applications:
Navigation and inertial measurement
Inertial measurement units (IMUs) combine accelerometers and gyroscopes to track aircraft motion and attitude. The raw sensor signals require precise analogue signal conditioning (such as low-noise amplification, integrated self-test circuitry, and temperature compensation) before digitisation. An ASIC can integrate these conditioning circuits with digital signal processing, calibration logic, and communication interfaces on a single die. This integration delivers lower power consumption, smaller form factor, and higher reliability than a discrete implementation.
Global navigation satellite system (GNSS) receivers and integrated receiver ICs are another critical application. These systems must decode extremely weak satellite signals in the presence of noise and jamming, compute position and velocity with high precision, and communicate results to flight management computers. ASIC design allows for tight integration of RF signal conditioning, digital baseband processing, and navigation algorithms, optimised for the specific constellation and application.
Quantum sensing and anti-spoofing
As aerospace systems increase in complexity, emerging technologies like quantum sensing are opening new design challenges. For example, the UK government is investing £8 million into anti-spoofing technology to protect commercial and military aircraft from cyberattacks that send fake GPS signals to trick navigation systems into reporting inaccurate positions. These quantum sensing systems require high-precision signal conditioning and ultra-fast control loops and feedback. Standard, off-the-shelf ICs may not satisfy these performance demands. Custom IC design allows engineers to optimise signal conditioning, processing latency, and control loop timing specifically for quantum sensor applications, delivering the performance margins that these emerging systems require.
Flight control and actuation
Modern aircraft rely on fly-by-wire systems where pilots command attitude, altitude, and course through control surfaces actuated by electric motors. These systems demand deterministic, low-latency feedback and control. An ASIC can integrate inertial sensing, discrete-time feedback control logic, actuator command generation, and built-in self-test (BIST) circuitry to deliver the precision and redundancy required. The integration of analogue and digital functionality on one die reduces the risk of faults in interconnecting circuitry, a key advantage in safety-critical systems.
Communication and radar systems
Modern military and commercial aircraft carry sophisticated communication and sensor systems. Radar systems, synthetic aperture radar (SAR) processors, and data links must handle high-bandwidth data while maintaining precise timing and low latency. ASICs are often used to integrate RF signal conditioning, digital signal processing (DSP), memory interfaces, and communication protocols. A custom design can be optimised for the specific frequency bands, bandwidths, and processing algorithms required by the application, delivering performance that a general-purpose processor cannot match.
Structural health monitoring and sensor networks
Modern aircraft increasingly use distributed sensor networks to monitor structural integrity, engine health, and environmental parameters. These systems integrate pressure transducers, temperature sensors, strain gauges, and vibration accelerometers. A sensor interface ASIC can condition these disparate analogue signals, detect out-of-range conditions, perform local signal processing, and communicate results via a standard bus. The result is a scalable, power-efficient network that reduces wiring weight and complexity.
Design considerations for aerospace ASICs
Radiation tolerance
Radiation effects are an important consideration in aerospace design, particularly for high-altitude and space applications. However, the severity of the radiation environment varies significantly. Commercial aircraft flying at 35,000-41,000 feet experience galactic cosmic ray exposure, while military aircraft may operate at higher altitudes or in different environments, and satellite and deep-space systems face orders of magnitude higher radiation flux.
It is important to characterise the actual radiation environment and design accordingly. Modern mixed-signal ASIC design can incorporate selective hardening techniques (such as radiation-tolerant latch designs, triple-modular redundancy for critical logic, or built-in error detection and correction) proportional to the application’s need. While many aerospace ICs in use today are radiation-tolerant, choosing an ASIC allows for the option of radiation hardening to further protect the design when the mission profile demands it. A careful analysis of the mission profile and failure modes allows for a cost-effective design that provides exactly the level of protection required, without over-engineering for radiation tolerance that is not needed.
Qualification and testing
Aerospace systems are subject to rigorous qualification standards, including DO-178C (for avionics software), DO-254 (for avionics hardware), and various military standards. These standards demand thorough documentation of design decisions, hazard analysis, test coverage, and compliance evidence.
ASIC design aligns naturally with these requirements. The design specification, architectural decisions, and hazard analysis can be documented from the outset. Testing can be comprehensive and tailored to the application: temperature cycling, altitude simulation, vibration testing, EMC (electromagnetic compatibility) verification, and reliability qualification. This systematic approach to qualification is far more practical for a custom IC than for a solution assembled from multiple standard components, each with its own qualification history and limitations.
Long-term design and documentation
Aerospace programs prioritise design stability and documentation. An ASIC’s design is often locked early and maintained in production for many years. This requires careful configuration management, traceability, and the preservation of design intent and test data. ASIC vendors serving aerospace markets understand this requirement and maintain detailed records of process variations, characterisation data, and long-term reliability performance. This institutional knowledge and documentation are essential to sustaining supply and supporting spares and upgrades over the life of the program.
The competitive advantage in an evolving space economy
The space and high-altitude economy is entering a period of rapid expansion. According to the World Economic Forum, the space economy is predicted to grow at an average of 9% per year until 2035, with increasing investment from private space players such as SpaceX and Blue Origin. This expansion is opening new markets and new engineering challenges for aerospace ICs.
Commercial space stations, orbital logistics, lunar landers, and autonomous aerial vehicles are emerging as critical application areas. These domains often cannot rely on the legacy supply chains of traditional aerospace and require fresh IC designs tailored to their specific requirements and mission profiles.
ASICs are a natural choice for these emerging applications. A new-space company designing a compact orbital platform can integrate power management, inertial sensing, communication, and thermal monitoring on an ASIC, reducing mass and complexity. An autonomous aerial vehicle manufacturer can design a sensor fusion ASIC that combines data from gyroscopes, accelerometers, magnetometers, and pressure transducers with embedded signal processing and communication logic. These designs can be optimised for the specific mission profile and constraints that off-the-shelf solutions cannot achieve, positioning organisations at the forefront of the space economy boom.
When to choose a custom IC for aerospace applications
A custom IC approach is worth considering when:
- You require mission-critical reliability with formal qualification under aerospace standards (DO-254, DO-178C, etc.). The systematic design documentation and testing of an ASIC integrates naturally with these standards.
- You need long-term supply assurance and guaranteed availability over 15-30+ years. A committed ASIC partner can provide continued production far longer than most standard semiconductor suppliers, and can provide better support during end-of-life.
- Your application has specific environmental or performance requirements that cannot be met by assembling standard components. This can include temperature extremes, EMI environment, power constraints, or precision sensing.
- You require integration of multiple functions (such as sensing, signal conditioning, digital processing, communication) into a compact, power-efficient package. A custom IC can deliver orders of magnitude improvement in size and power over a discrete solution.
As Ross Turnbull, Director of Business Development at Swindon Silicon Systems, explains: “”Breakthroughs in aerospace are occurring rapidly, but the electronics that power aircraft and rockets must keep pace. ASICs offer a customised option that ensures that these vehicles remain efficient, reliable and secure for decades to come.“
Developing an aerospace-qualified ASIC
The process of developing an ASIC for aerospace applications differs in scope and rigour from consumer or industrial projects, but follows a similar overall arc: requirements capture, architecture definition, design, verification, physical implementation, manufacturing, and qualification testing.
Every ASIC design decision must be justified and documented. Trade studies comparing architectural alternatives, failure mode and effects analysis (FMEA), hazard analysis, and design reviews at key milestones are standard practice. Testing is comprehensive: design verification testing (DVT) covers functional correctness, timing, noise margins, and temperature/voltage performance. Design qualification testing (DQT) includes accelerated life testing, radiation testing (if applicable), and operational envelope verification.
A design partner experienced in aerospace should guide the project through these disciplines from day one. The cost of design changes increases exponentially as the project progresses; getting the architecture and requirements right early prevents costly problems downstream and ensures a smooth path to qualification.
ASICs: enabling the next generation of aerospace innovation
The aerospace industry demands the best that semiconductor technology can deliver. Today, as aircraft become more autonomous, more intelligent, and more connected, the role of custom ICs is more important than ever. ASICs allow designers to optimise for mission success rather than compromise for generality. They enable integration, reliability, and supply assurance that off-the-shelf alternatives cannot provide.
Whether you are designing next-generation avionics, flight control systems, or new-space platforms, a feasibility discussion with an experienced aerospace ASIC design partner can help you determine whether a custom IC approach is right for your application. With 40+ years of experience in mixed-signal design and deployment across automotive, industrial, and aerospace sectors, Swindon Silicon Systems understands the rigour and discipline that aerospace programmes demand.
If you would like to explore whether ASICs could benefit your aerospace application, contact Swindon Silicon Systems.
Frequently Asked Questions About ASICs in Aerospace
What is the difference between an ASIC and a general-purpose processor in aerospace?
An ASIC and a general-purpose processor are fundamentally different architectures, not alternatives for the same task. A general-purpose processor is designed to run arbitrary software, while an ASIC is a custom integrated circuit that optimises an entire system (analogue circuits, digital logic, interfaces, and control loops) for a specific application. Many ASICs contain embedded processors as one component, but the advantage of the ASIC approach is not in optimising the processor itself. It is in custom-designing the whole system for the mission. This system-level integration delivers benefits a processor-based solution cannot match. It can provide lower power consumption, reduced latency for critical feedback loops, smaller form factor, and elimination of unnecessary components. For aerospace applications where power is limited, heat generation is constrained, and failure is not an option, this means an ASIC is often the right choice.
Are ASICs used in commercial aviation, or only in military applications?
ASICs are used extensively in both commercial and military aerospace. Commercial avionics (such as flight control computers, navigation systems, communication interfaces, and sensor modules) have incorporated custom ICs for decades. The reliability and longevity requirements are just as stringent in the commercial sector. The advantage of supply assurance and design stability is equally valuable for commercial aircraft programmes, which often operate in service for 20-30 years.
