Hello,
The datasheet for this device under the absolute maximum ratings states:
Supply Voltage VDD Without BEAM ...(GND-0.3V) to +30.0V
Supply Voltage VDD Under Beam .....(GND-0.3V) to 14.7V
What does "BEAM" mean?
Thanks
hmee
The term "without beam" refers to an environment without heavy ions versus "under beam" which refers to a an environment under heavy ions. We determine this during SEE and specifically SEL (Single Event Latch-up) and SEB (Single Event Burnout) testing.
The maximum operational voltage when not under beam is typically a safe voltage below the voltage breakdown of the device.
The maximum operational voltage when under beam is the safe voltage in a heavy ion environment so that SEL and SEB will not occur.
The maximum operating voltage under beam is always less than when not under a heavy ion environment. We make this distinction to allow for de-rating decisions made by system designers.
Best regards, Cindy, Renesas Online Apps Engineer
Thanks for clarifying Cindy