# What is currently the highest slew rate of any available op-amp? [closed]

Also, how is there a theoretical/practical upper limit to slew rates? Suppose a customer wanted an extreme high speed op amp with a slew rate of, say, 5 Volts per femtosecond(which would translate to 5GV/μs)? Would that even be possible with a purely electronic op amp or would optics be required.

• An odd question. What do you need it for? Or is it homework? Perhaps the highest available slew rates costs a hundred thousand dollars, is it still useful for you? Jan 31, 2020 at 17:18
• Let me consult the Guinness Book of Analog Electronics and get back to you.
– user16324
Jan 31, 2020 at 17:29
• How would optics generate a rapid voltage change? Jan 31, 2020 at 17:36
• 500MHz is the max I have seen. What current do you expect into 1pF at this rate, then you can determine the source impedance or current per picofarad. Ic=CdV/dt = 1e-12*5e9 * 1e6 = 60e3 Amps 60 thousand amps into 1 picofarad. How about an EMP? Sorry no negative feedback MR X. For EO parts they are not Op AMPs but GaAs semiconductors. Jan 31, 2020 at 17:44
• There are 6.5 GHz fully-differential amps like the LMH5401 or ADL5569 with up to 24 kV/µs.
– CL.
Jan 31, 2020 at 18:21