SMD marking 2290?

[dagav]

What coponent does SMD marking 2290 indicate. Casing is SOT89-3

[R_J]

Re: SMD marking 2290?

What is the board from? What is the make and model? It may be a custom number.
What is wrong with the part?

[redwire]

Re: SMD marking 2290?

Looking at the board, my guess is an RF Amplifier MMIC or LNA IC.

[dagav]

Re: SMD marking 2290?

Hi, got help on EEVblog forum with this one. Despite missing markingnumber in the datasheet i think it is a MAAM-009100, RF amplifier, https://cdn.badcaps-static.com/pdfs/...050b273604.pdf
It is 6 of them in a adjustable RF amplifier, originaly made by MACAB, a swedish company, but sold by a norwegian company as ELKO. It is very special solution(imo), used to amplify RF signal onto ethernetnetwork, using one of the pair, and a "balun" at each outlet, for connection to the TV. Since the PSU to this unit was dead, I suspected more damage on the amplifier, because a lot of noise on the outputs, when a new psu was connected. That can possibly be a matter of adjusting, we shall see. Since these units are not sold anymore, it has some value for the user to get it up and go again.
Regards
D.A.

[R_J]

Re: SMD marking 2290?

Thanks for the info, Macom has other amp ic's like this but I can't seem to figure out their part number scheme, The top number is the part number (22)

In the datasheet for the MAAM-011220, it has a part number 49?