Help identify this IC

[OmegaHyperion]

Well, im repairing yet another thing, and this time its a scale. Its giving me error codes that point to the ADC or some preamp in the thermal compensation system being shot, but i dont have a thermal camera to check the chips. I have traced the PTC to this chip, but im having difficulties finding a data sheet, let alone a place to buy it, so i cant replace it. (i checked the PTC, it works, since i dont have a part number i cant check the exact value, but it did reliably change resistance proportional to temperature)

I was hoping someone here could help identify and or help me find the data sheet to this chip, and thus help this old scale work once more.

[Cyberdragon]

It's a 3562 TKS2 chip apparently. Found it from alot of Chinese sellers ranging from US$0.10 to $5.00. However, there appears to be no information, not even the function of the chip. They don't even have any real photos of the chip, just stock chip photos, and all the datasheet links are broken or "available on request". Oh, and all of the product descriptions are random words and numbers in the catagories that make no sense at all. They really don't want anyone knowing what this chip is.

[amyk]

Manufacturer is European Silicon Structures (or European Siliconstructures, depending on which webpage you read...), acquired by Atmel a long time ago. Maybe if you trace the pinout it might  correspond to a current part.

[Chris56000]

Hi!

I've seen this idea of a T- filter circuit between pins 9 & 10 of a chip, which the small picture you've posted clearly shows, before, but I can't remember for the life of me where I saw it!

Can you tell us what the board is from? I'm sure that there's some sort of TV IF, PLL or gain block IC that has this filter going between 9 and 10 in exsistence that's more widely known!

Chris Williams

[OmegaHyperion]

The board is from a Sartorius BP310S Precision Scale.

Its showing error codes that show problems with the temperature compensation circuit. I checked its PTC, so my guess would be that this chip is the problem.