Michael,
The OPA4684 is a quad version of the OPA684, which has a disable pin. They are using the same spice pinout even though the OPA4684 has no disable pin. This pin is active low, so for your simulations, tie the disable pin to the positive supply…
Couple of quick things Akash,
1. Where is your DC bias current path for the V+ inputs to the op amps?
2. This differential I/O op amp circuit sometimes has a common mode oscillation - probably not here, but we did see that in the OPA838 decomp device…
Pete,
Yes I believe that this is noise. I eliminated the 3rd gain stage (set it to 1V/V) and now only have the first gain stage and second gain stage set at 100V/V for the LMH6629 and 50V/V for the OPA684 for a total of 5000V/V. The signal below does…
Hi Peter,
The OPA684 should fit your need quite nicely. In order to achieve 100V/V with 100MHz bandwidth, you might want to consider using 2 amplifiers in series each with a maximum gain of 10V/V.
Note that the gain resistor will need to be change…
Other Parts Discussed in Thread: OPA835 , OPA836 , OPA2889 , THS4281 , OPA890 , LMH6618 , LMH6645 , OPA683 , LMH6723 , OPA684 do you have suggestion part to replace LT6233-10?
Hello Kevin,
I would start with the OPA684. It can achieve 120MHz at a gain of 10V/V on 1.7mA quiscent current with ±5V supply.
The next device would be the OPA694 and will achieve 200MHz at a gain of 10V/V on 5.8mA with ±5V supplies. It should still…
Other Parts Discussed in Thread: OPA695 , OPA684 , OPA4872 , THS3092 , THS3091 , THS3201 , THS3202 , OPA694 , OPA691 Hi,
I'm a total newbie to choosing amplifiers and i need an operational amplifier to amplify a sine signal from 1Vpp to 10 Vpp (Gain…
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: OPA684 , OPA657 , OPA847 , DEM-OPA-SOT-1B , DEM-OPA-SO-1B , THS3202 , LMH6629 Hello,
I am looking to design a transimpedance amplifier for use with an avalanche photodiode in a battery powered application and was hoping…
