sample & hold caps/ timing.

[Heiko van der Linden]

Hi Roel,

>And are there nice replacements (pincompatible and better) for the tl082
>buffers?


Here's a replacement for the Tl082:

http://www.analog.com/pdf/AD712_b.pdf

The ad712 is the dual version of the AD711. This is a high-speed Bifet (JFET
in the inputs) opamp.

Slew rate: 16V/us
input bias current: 50pA

It's stated to be a improved replacement for the TL082 so it should be
perfect for your application.
The price is around $4 at Farnell but they are always a bit more expensive.


And for all the people on the list:

I think the AD711 can make nice replacements for high-speed application
OP-amps that are out of stock etc. And it
seems like a nice opamp to use in designs. I don't know if there are opamps
with better specs that are a lot cheaper.
If those exist I would really like to know.

Check it and see for yourself:
http://www.analog.com/pdf/ad711_.pdf

I'm ordering a couple of these for a university project (high frequency
conductivity meter) and I will tell it
if I like them a lot.

Bye,
Heiko