The data sheet for AD8338 does not specify the impedance on the GAIN control input pin. Hoping someone can provide that information.
AD8338
Recommended for New Designs
The AD8338 is a variable gain amplifier (VGA) for applications
that require a fully differential signal path, low power, low noise,
and a well-defined...
Datasheet
AD8338 on Analog.com
The data sheet for AD8338 does not specify the impedance on the GAIN control input pin. Hoping someone can provide that information.
Hi Tim,
The gain control input pin has a high impedance. Its impedance depends on the voltage at gain pin. Actually this pin has a leakage current of 10nA. So at a minimum input voltage of 0.1V, it has an impedance of 10 MΩ and for a maximum input voltage of 1.1V it has an impedance of 110 MΩ.
By the way, can I ask what is your application?
I hope this helps.
Regards,
Jay
Jay
Thanks for getting back. My application is liquid/gas flow measurement. One more question: Where can I find a pdf of the AD8338-EVAL gerber pcb files?
Tim
Hi Tim,
Please see the attached file and let me know if there is anything else needed.
Cheers,
-David