Programmable Gain Amplifier?

Hi Andre,

The AD8250 has digitally programmable gains of 1,2,5 &10.  The gains of 1,2, & 5 have BW of 10 MHz.

What are some of you other requirements in terms of gain accuracy, range, resolution and noise for starters?

Would using a VGA with SPI programmble DAC to change the gain be an acceptable approach?  If so you could consider the AD8331.

Thanks,

Paul

Well, that last one would be good but it has no symmetrical supply :S I need that cause i will amplify signals with a voltage range between -0.3V and 0.3V

Perhaps the same approach, but using the AD8336.  This has dual supplies.  Would this work out for you?

That one has no digital programmable interface :S

Can someone tell me if the AD8326 can have an output impedance of 50 omhs? if not how can i addapt the 75 ohms to 50 ohms?

André