LTM46XX series (R504 Family) susceptibility to Space Radiation

Hi,

Would like to know how well the LTM46XX series( mainly the LTM4650A, LTM4644, LTM4632 and LTM4620) can withstand space radiation ?

- Any radiation test performed or space heritage on these parts ?

- What kind of fabrication process(es) is/are used for these parts ? (CMOS ? Bipolar ? BiCMOS ? Mix of a few ?)

- And since the reliability report grouped them into the same R504 family, with the same failure rates; does it mean the fabrication processes used are the same for all these part ?

Thanks

SXPANG