Making electronic parts and circuits resistant to damage or malfunction brought on by high levels of ionizing radiation (particle radiation and high-energy electromagnetic radiation) is known as radiation hardening multiplexing.
This process is particularly important for environments in outer space (especially beyond low Earth orbit), near nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
Radiation-hardened (rad-hard) components are based on their non-hardened equivalents but include some design and manufacturing changes that lower the susceptibility to radiation damage. The majority of semiconductor electronic components are sensitive to radiation damage.
The global radiation hardened multiplexers market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
The ISL71840SEH and ISL71841SEH, new radiation hardened (rad hard) multiplexers from Intersil Corporation, offer the finest electrostatic discharge (ESD) protection in their class as well as the highest signal chain accuracy and timing performance available in the market.
The extensively used Intersil HS9-1840ARH 30V 16-channel multiplexer, which has flown on almost all satellites and space exploration missions, including NASA’s most recent Orion spacecraft flight test, can be swapped out with the ISL71840SEH.
The new ISL71841SEH 30V 32-channel multiplexer offers great performance and 41% less board area than an ISL71840SEH two-chip solution for applications with form factor restrictions.
The ISL71840SEH and ISL71841SEH rad hard multiplexers utilize Intersil’s exclusive silicon on insulator technique, which offers single event latch-up (SEL) robustness in heavy ion environments, to give ultra-high performance in the most demanding conditions.
These devices’ improved 8kV ESD protection function does away with the requirement for pricey external protection diodes on the input pins.
Additionally, the performance and accuracy of telemetry signals processed and multiplexed into an analog-to-digital converter (ADC) input are improved by their decreased RON of 500 Ohms at +/-5V and propagation delays of less than 800ns.
To sustain the continuous processing of telemetry test points, the ISL71840SEH and ISL71841SEH provide over-voltage protection on a per-switch basis.
The remaining input channels keep transmitting data to the ADC even if one of them encounters an over-voltage condition.
The “cold spare” redundant capacity of both multiplexers enables the connecting of a few more unpowered multiplexers to a single data bus.
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