Differential Amplifier with higher gain bandwidth??

Hello Shurp,

How are you?

You may want to check out LT1991 - it uses 450kohms resistance with 560kHz BW (G=1).

There is a tool for it if you want to explore and simulate in LT Spice - LT1991 Beta Tool

I hope it helps.

That's all,
Sham

Sham It's unfortunate that LT1991 has limited gain of upto 13. I will need a gain of 1000.

Hi Shurp,

I see. Have you considered using an Instrumentation amplifier?
You can see the selection table in this link .

Best Regards,
Sham

Sham it is a sine wave @400Khz. Does instrumentation even work on sine wave @400kHz?? I thought instrumentation amplifier works well for low frequency but not high frequency.  

Hi, 

Lower gains can operate up to the MHz-range but unfortunately for G=1000, highest BW is up to 150kHz only.
Another solution you can try is to use discrete circuits - differential amplifier + resistor network. 
You can check LT5400-2, a quad matched resistor network.

Best Regards,
Sham

Hi, 

Lower gains can operate up to the MHz-range but unfortunately for G=1000, highest BW is up to 150kHz only.
Another solution you can try is to use discrete circuits - differential amplifier + resistor network. 
You can check LT5400-2, a quad matched resistor network.

Best Regards,
Sham