Radiation-tolerant plastic ICs target small satellite mega-constellations

September 20, 2017 // By Julien Happich
Intersil has released the first three members of its new family of radiation-tolerant plastic-package ICs designed to support the emerging field of small satellites.

Intersil’s rad-tolerant plastic parts include the ISL71026M 3.3V controller area network (CAN) transceiver, ISL71444M 40V quad precision rail-to-rail input and output (RRIO) op amp, and the ISL71001M 6A point-of-load (POL) voltage regulator. These ICs deliver rad-tolerance performance at a much lower cost point versus radiation assurance tested Class V (space level) products. All three ISL71xxxM devices go through characterization testing, which includes total ionizing doze (TID) up to 30krads (Si) for single event effects (SEE). SEE take into account single event burnout (SEB), single event latch-up (SEL), single event transients (SETs) and single event functional interrupts (SEFIs) at a linear energy transfer (LET) of 43MeV•cm 2/mg.
The ISL71xxxM are also well suited for high altitude (>40km) avionic systems, launch vehicles that are prone to heavy ions, and medical equipment where radiation is a concern. The ISL71026M radiation-tolerant 3.3V CAN transceiver provides serial data transmission at speeds up to 1Mbps, it operates from 3V to 3.6V, with a quiescent supply current of 7mA (max). Up to 120 transceivers can be connected to a single CAN bus to reduce cabling/harness size, weight and power (SWAP) costs for satellite command and telemetry systems. 

Operating from 2.7V to 40V, the ISL71444M rad-tolerant quad RRIO op amp provides low power, a very low input offset voltage of 300µV, and excellent output noise performance. Its SET recovery of under 5µs eliminates external filtering.

Switching at 1MHz, the ISL71001M rad-tolerant 6A synchronous buck regulator with integrated MOSFETs delivers high peak efficiency up to 95%, and steps down 5V and 3.3V primary rails to POL inputs as low as 0.8V for FPGAs, CPLDs, DSPs, CPUs and peripheral I/Os.

Intersil - www.intersil.com