Op Amp as a buffer in lt spice for high voltage and high frequency

Question

I want to make a buffer which can drive my sine wave with an amplitude of ±25 volts and a frequency of 25 MHz. Which Op amp in LTspice should i use?

If you don't want to build it in real life, use an ideal one. — Arsenal, Commented Sep 14, 2016 at 15:21
@ThePhoton It's better to use a VCCS with a terminating resistor, instead, as it converges much faster and also behaves like a real buffer with real output impedance (warmly recommended by the manual), or with also a small enough capacitor to avoid possible discontinuitues (or steep transients). If a bandwidth is also needed, then pipe's answer will do (or a G+C with Rpar specified). Of course, for simple enough schematics, a VCVS will do, no need for useless complications. — a concerned citizen, Commented Sep 15, 2016 at 7:41
i need a real op AMP :( because i need to use it in my board... — Momo Th, Commented Sep 19, 2016 at 13:02

pipe · Accepted Answer · 2016-09-14 15:18:47Z

3

Use the one called opamp. Make sure to follow the advice in the description to add a .LIB opamp.sub statement:

The default bandwidth is too low, so you have to right-click on the opamp symbol and increase it. Set it to whatever you want. Here I used 1000 Meg:

answered Sep 14, 2016 at 15:18

pipe

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\$\begingroup\$ hey! thank you so much :) but i need a real op AMP :( because i need to use it in my board... I found the THS3001 from ti and i think it should work \$\endgroup\$
– Momo Th
Commented Sep 19, 2016 at 13:02

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