I'm using the ADA4899 Op Amp in the CP-8-4 pkg with the heat sink tab. Can I ground the heat sink? Can I connect multiple ADA4899s to the same solder pad? What happens if a signal trace touches the Heat Sink pad?
Good day! I think you are using ADA4899-1 in CP-8-2 package not CP-8-4. As to your query, the heat sink tab or the so-called exposed metal paddle improves heat transfer to the ground plane, therefore it must be connected to the ground. Please refer to grounding section, page 17, of ADA4899-1 datasheet for reference. Also, if you will be soldering the part, use a solder paste in order to have a connection or for conduction between the pad and the board.
This link http://www.analog.com/library/analogDialogue/archives/39-09/layout.html will also guide you in your PCB layout.
Hope this helps.
I moved this question about the ADA4899-1 to the Operational Amplifiers Community. Someone here should be able to assist you.
EngineerZone Community Manager
I assumed it should be ground but the eval board doco I was looking at and the Pinout on the data sheet was not very specific about the heat sink connections and I want to avoid any problems.
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