Will there ever be an ADA4899-2? I have a circuit that actually uses two ADA4899-1, but I would really love to have two of them in this nice little CP16-2-Package to save precious pcb area
Thank you for using ADA4899. I'll ask your question to the apps engineer of this part. For now, your two single amplifiers are more efficient to use than a dual. Yes, you will save PCB area, cost and test time however, there are effects of duals that you have to consider like higher offset, crosstalk, unbalanced input due to imbalanced temperature and many more. You may read this very good article of Harry Holt on using either single or dual amplifiers. Here's the link - http://www.planetanalog.com/document.asp?doc_id=528114 .
Hope this helps.
Thanks for your quick reply. I didn't know the article but since I want to use the opamps as part of a Three-Opamp-Inamp, even the author suggests a dual (second part of the article). So the question remains .
Otherwise I am open-minded using a different dual-type that has <1.4 nV/rtHz with GBWP > 500MHz and comes in the LFCS-Package!
I don't see us releasing the ADA4899 in dual LFCSP in the near future. However, maybe we have a dual that can fit your application?
We recently released the ADA4896-2 and the ADA4897-2, maybe they would work for you?
Unfortunately not. I already tried these and at least in the simulation they don't have enough GBW and/or SR. I need a noninverting gain of 8.8 for a 30MHz-Signal with output amplitudes up to 200mVpp. Even the ADA4899 has a hard time delivering this!
I would love to try the ADA4895, but the SPICE-model shows such excessive gain peaking that the compensation network for lower gains from its datasheet doesn't work in the simulation!
Even better let's try the ADA4895-2, it's designed for high gains while maintaining the BW.
you can adda a feedback cap to reduce the high frequency peaking.
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