Other Parts Discussed in Thread: TINA-TI, LMP7717
Dear Support
I am currently working on a design that requires integrating an electrochemical sensor.
I have designed my 1st circuit using LMP7721 by using some guide notes from TI application notes for same OPAMP & also some other reference material online. I believe that this circuit "works" at least at room temperature as in I have not seen an oscillations or over current issues
I have also designed couple of other boards to experiment with smaller package OPAMPs (SOT23-5 & MSOP-8 dual) that I would like to use in my application due to space & cost constraints. I believe that opamps that I am using for these new boards have DC specification well within the range of my requirement but I am having serious issues to get this circuit to stable conditions.
So, I think I need support for following cases:
Help in selecting the suitable OPAMP (smaller package) (SOT23-5) OR MSOP_8(dual - ideally) for my application. Help in selecting the right components (especially RC filters around the potentiostatic & transimpedance amplifier) so that my circuit does not oscillate.
I have also started playing with TINA-TI to gain better understanding on OPAMP stability especially the effects of using Capacitance in feedback path by using online help videos. It would be greatly appreciated if I could also get some help in doing stability analysis in TINA TI for transimpedance amplifier please.
I am happy to share my schematics & circuit layout & Gas sensors datasheet if you could kindly provide me with your email.
Looking forward to your reply
Kind Regards
NS
