Quoted below is a conversation cut and pasted from a Facebook Messenger thread between ADI and a customer who is trying to identify parts based on the package markings. Can we help?? Happy to refer him to a discussion forum if that is easier.
Damitha Weerakoon
hi
need some help identifying a IC
ADI
Hi Damitha. How can we help?
Damitha Weerakoon
I have few ics I need to know there numbers
I can give the package markings
Can you help
ADI
I may be able to help, but if not I will refer you to the relevant forum at our support community, EngineerZone.
Damitha Weerakoon
ok
first is a 10 pin ic Package has
D
6A
i think its one of ties
AD5627R/
AD5647R/
AD5667R
can you confirm ?
im like 90% sure its one of them
2nd is 8pin IC Package has
Y0
Q
or
YO
Q
think its
ad8219 or
ad8221
im not sure at all about that:P
form the circuit arround it looks like a opamp
ADI
Let me try to find some answers for you.
Damitha Weerakoon
both are used in a circuit analog end that get connected to temperate sensors ( PT100 and KT40 )
Also this is part of a Industrial compresser 
and the controlelrs says it does not detedt the temp sensors and preshure sensors ( all controled by this part of the circuit )
some guy try to repaire this and messed every thing up 