Dear Sir/Madam,
I am using LMH6642MF/NOPB as an inverting amplifier with gain = 56. The operating frequency is at 1.6MHz.
The cut-off is intentionally at 1MHz
The GBWP is about 57MHz for LMH6642MF.
I want to increase the gain = 100. Does TI has a similar amp as LMH6642MF with GBWP~100MHz?
Best Regards,
KPK
Morning Poh,
You should look at the OPA838,
However you will need to add a cap on the inverting node to ground perhaps for stability, Also your R values need to come down a little if you care about noise.
Here is a design that looks promising,
Here is the spot noise, that peaking out around 200MHz suggests you might want to run a loop gain phase margin test, might need to increase the cap to ground on the inverting input for this.
Here is the file for you to pursue further,
