Hi Jason,
I'm suspecting that your compensation capacitor C F (or C1 in your case shown with TINA-TI) is too large at 3pF. Going by OPA847 datasheet Equation 1 on page 11, C F = 1.8pF (with CD=~50pF). So, you might be band-limiting yourself and not…
Thomas,
The OPA846 is not unity gain stable and will most likely oscillate if constructed as shown. This is probably causing a problem for the simulator. The OPA842 is the same basic amplifier that is compensated for untiy gain operation.
Another…
Other Parts Discussed in Thread: OPA842 Hi,
I believe somewhere that TI had a recommended replacement for the OPA642.
Cant seem to find this. Any help is appreciated.
Tim
Hi Michael, here is the unprotected version. the password was "AABBBBABABB >" , it appears ">" cannot be used in a filename.
DACdifferential_singledesign_unprotected.xls
Other Parts Discussed in Thread: OPA4872 , OPA842 , OPA843 , OPA846 , OPA847 Dear everybody,
I'm designing a new frontend photodiode for a four quadrant 4456.tr12.zip s system. My requirements are the following :
Photodiode capacitance : 16pF /…
No kai was right on gain as well - and you are right on frequency - both are related to LG degrading which is what controls HD (partially) -that breaks down as you start approaching slew limiting, in fact I have a rule of thumb about that, but in the…
Other Parts Discussed in Thread: OPA657 , TINA-TI Designing for high-resolution detection circuits using photodiodes? See the new Application Report " Transimpedance Considerations for High-Speed Amplifers " by Xavier Ramus.
