Category: Hardware
Product Number: LTC4332
We have tested two different batches for now. First one from Farnell, the product was LTC4332I. Second time from mouser we tested LTC4332I and LTC4332H devices.
With Farnell part the IC stops forwarding valid data if the ambient drops under 0 degrees C.
With mouser parts the threshold is around -8C, although the part is rated to -40C.
The sad thing is that the marking on the part itself does not specify the temperature class so we first taught it might be a mixup by Farnell, but now it seems unlikely.
We added a hater resistor on top of the IC to locally heat it, and that fixed the problem, so now we know that the problem lies with the LTC part.
Any ideas/comments?
It seems to be unusable in an industrial product!
