Radiation-tolerant plastic ICs for small, shorter-lifetime satellites

Radiation-tolerant plastic ICs for small, shorter-lifetime satellites

New Products |
By eeNews Europe

In this vision, fleets of hundreds of small satellites will create mega-constellation networks to deliver broadband Internet links from low Earth orbit (LEO) to every point on the globe, including rural areas without wireless connectivity access. These will be short duration LEO mission profiles; 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 price point versus radiation assurance tested Class V (space level) products. All three ISL71xxxM devices go through characterization testing, which includes total ionizing dose (TID) up to 30 krads (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 43 MeV•cm2/mg.


Intersil’s rad-tolerant plastic packaging exploits the company’s spaceflight experience developing rad hard (defined as >75 krad) and rad-tolerant (<75 krad) products for extremely harsh environments. The upfront radiation effects characterization and AEC-Q100 automotive-like qualification gives confidence to design these radiation-tolerant plastic parts into cost-sensitive small satellites for LEO mission profiles up to five-years. The ISL71xxxM are also suited for high altitude (>40 km) avionic systems, launch vehicles that are prone to heavy ions, and medical equipment where radiation is a concern.


The ISL71026M (5 x 4.4 mm, 14-lead TSSOP) radiation-tolerant 3.3V CAN transceiver provides serial data transmission at speeds up to 1 Mbps. 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.

– Operates at input voltage range from 3V to 3.6V

– Quiescent supply current: 7 mA (max), Listen mode supply current: 2 mA (max)

– Compliant with ISO 11898-2 physical layer standard

– Bus fault protection up to ±20V, and loopback/listen mode

– Cold spare capability: powered down devices/nodes without affecting active devices operating in parallel

– Characterized radiation-tolerant to 30 krad(Si) and SEE at LET = 43 MeV•cm2/mg


The ISL71444M rad-tolerant quad RRIO op amp (5 x 4.4 mm, 14-lead TSSOP) provides low power, low offset voltage, and excellent output noise performance. Its SET recovery of <5 µsec eliminates external filtering.

– Wide single and dual supply range from 2.7V to 40V

– Wide gain bandwidth (GBW) product of 19 MHz

– Very low input offset voltage of 300 µV

– Low current consumption per amplifier of 1.1 mA typical, and high slew rate of 60 V/µsec

– Characterized radiation-tolerant to 30 krad(Si) and SEE at LET = 43 MeV•cm2/mg


The ISL71001M rad-tolerant 6A synchronous buck regulator with integrated MOSFETs (10 x 10 mm, 64-lead QFP (e-pad)) 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.

– Operates at input voltage range from 3V to 5.5V

– Tightly regulated output voltage externally adjustable from 0.8V to 85% of Vin

– Fixed 1 MHz switching frequency for reduced filter size

±1.2% referenced voltage, and compensation free

– Bidirectional SYNC pin synchronizes two devices 180° out of phase

– Provides adjustable output voltage, analog soft-start, input/output undervoltage, overcurrent protection, and power-good output voltage monitor

– Characterized radiation-tolerant to 30 krad(Si) and SEE at LET = 43 MeV•cm2/mg





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