Good point. Some of the opamps in the 1mA range claim pretty amazing speeds. I guess they have dynamic biasing that increases with demand.
I've had good results with AD8031/32. 1mA or less, but 12V max supply, if that's OK for you.
Jan
Jan
Thnx for tip Jan. Slightly high Vn/Hz but since this is a unity gain stage that is probably ok. Unfortunately the plot thickens. The package chosen is SC70, and that limits the choices quite drastically. (This is a design I am taking over from another designer and I missed that little detail untill now). I was about to go for LT6233, but that doesn't come in that package. I have tested AD8691 but it is just a bit too slow in the large signal department.
The only option I've found so far is ADA4807. But to make up for that it has quite exemplar specs. It will be interesting to test it out. Unfortunately pretty pricey so the bossman is not gonna be happy. But what do I know I'm just a lowly designer.
The only option I've found so far is ADA4807. But to make up for that it has quite exemplar specs. It will be interesting to test it out. Unfortunately pretty pricey so the bossman is not gonna be happy. But what do I know I'm just a lowly designer.
The 'ADA-series' opamps from analog are new to me. Usually the letters designate the design house, or location. For instance LT-xxx and LTC-xxx series from Linear Tech are designed either in the USA (LT I think) or in India (LTC I think) I might have that mixed, but I think it is like that.
So is ADA-xxxx designed in some other locale than the AD-xxxx opamps?
Does it matter? Probably not, TI, Analog, Maxim, etc all are reputable and I will expect the quality to be good no matter ADA or AD...
So is ADA-xxxx designed in some other locale than the AD-xxxx opamps?
Does it matter? Probably not, TI, Analog, Maxim, etc all are reputable and I will expect the quality to be good no matter ADA or AD...