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ltc2641 die -

The largest temp range the DAC will operate per the data sheet is -40 to +85 C. If I get the die will it operate at -55 to 125C? I will be mounting the die on ceramic substrate.

does the assumption that it will work if properly heatsunk although the die doesn''t consume much power or is it because LT/ADI doesn't characterize the part below -40 C?