Dwayne, I use TONS of Microchip's op-amps, comparators and LDOs for my jellybean parts. Oddly enough I used one to build a current sink like you describe just a few months ago. Agreed on Microchip's parametric search for analog parts especially. What I do is use Digikey's parametric search. Way faster than Microchip's and much easier to use. I can usually get to the Microchip part I want in a minute or two. Plus you get ballpark pricing too. Matt Pobursky Maximum Performance Systems On Thu, 25 Feb 2016 17:24:47 -0700, Dwayne Reid wrote: > Good day to all. > > I'm on yet another project with analog bits inside and none of my > favorite dual op-amps are suitable. > > The LM358 would be perfect, except its output isn't rail-to-rail. I need > that in this project. > > Supply voltage is 5 Vdc. Input must include ground (0V) within the > common-mode range but maximum input is about 1.2V. Output needs to swing > from about Vss to Vdd, give or take a hundred mV. GBW about 1 MHz is fine= .. > > It's going to be used in a constant-current sink for battery testing. > Input reference varies from 0V to 1.2V - this sets the value of the > current being sunk. The output of the op-amp is driving a decent-sized > MOSFET through a 100R resistor. Thus, the op-amp has to be stable > driving a capacitive load. > > I want cheap and cheery and have been looking at Microchip's offerings. > Alas - there are thousands to choose from and the Microchip parametric > search engine has gone from awful to bloody awful. > > Ideal package for me is SO-8. > > Does anyone have a favorite part they really like? > > Many thanks! > > dwayne > > -- > Dwayne Reid > Trinity Electronics Systems Ltd Edmonton, AB, CANADA 780-489-3199 > voice 780-487-6397 fax 888-489-3199 Toll Free www.trinity- > electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .