Programmable Gain Amplifier

[Shreyas Kulkarni]

can somebody suggest me a low noise, faily low cost, programmable gain
wideband amplifier with bandwidth>=20MHz, gain varying from 1 to at
least 10 and with high CMRR?

any further links/tips/approaches will be highly appreciated.
TIA,
Shreyas Kulkarni

 

[Frank Miles]

In article <1103675248.888851.120340@z14g2000cwz.googlegroups.com>,
Shreyas Kulkarni <shyran@gmail.com> wrote:

can somebody suggest me a low noise, faily low cost, programmable gain
wideband amplifier with bandwidth>=20MHz, gain varying from 1 to at
least 10 and with high CMRR?

any further links/tips/approaches will be highly appreciated.
TIA,
Shreyas Kulkarni

Burr-Brown (oops, TI) has some nice digitally programmable instrumentation
amplifiers, but not with that kind of bandwidth. You haven't spec'd the
gain accuracy, input bias current, nor what constitutes "low noise".
There are additional choices if you supply your own analog switches
in tandem with the amplifier, many more if you supply the gain-setting
resistors though getting flat frequency response may require some care.
Maybe you provide more detailed specs, or at least what you might be
willing to trade off?

-frank
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