Part Number: LMH5401 Hello
Please let let me know if the LMH5401 has been characterized for Rf = 1K or 2K.
What will be the 3db bandwidth at G =1 and or g = 5?
Will a compensating Cf need to be added?
Hi Michael, sorry for the delay in response. I have updated my simulation to include the PD capacitance and trace capacitance. I am using a 0.9pF FB capacitor to improve stability, calculated using a TI app note. Running the AC analysis shows instability…
Part Number: LMH5401 How much do you expect the CMRR to change vs. temperature/Rload/gain? I'm designing a circuit with tight CMRR specifications,and wanted to get an idea of how much variation I should expect to have.
Thank you!
Hi Yangang,
The LMH5401 is not stable for unity gain in the standard EVM configuration. However, it can be achieved by few changes. The excel calculator you are referring doesn't account for lower gains. You can follow the below reference design when…
Part Number: LMH5401 Out of curiosity, was this ever measured? If not, would you be able to possible provide me with a simulated current (and voltage, if you have it) noise model out to 8 GHz?
Hi Hruday,
thanks for getting back to me on this. I asked this question with a limited understanding of how FDAs actually work. I initially thought I could set up the FDA in the same way as a conventional (single ended) difference amplifier, but after …