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
I'd like to use the AD8338 - the high end BW is well documented at 18MHz, but am confused about the low frequency end. Gain plots begin at 10KHz - what happens below that? Is this amplifier DC coupled?
Also, what is the input impedance of the GAIN pin?
Hi Infraredx ,
Good day. We'll try to look into this and get back to you. Thank you.
Regards,
Gilbeys
Yet one more thing: the datasheet only lists VBAT = +3.0V operation, yet the part can be powered up to +5.0V. Do the input and output ranges and VREF scale accordingly?
Hi Infraredx ,
As for the gain plots on lower frequency, we can have it by doing a bench test on the device. As we assume it was linear from lowest frequency which is 10kHz up to lower frequencies. You can check this reference of the FAQ of AD8338.
AD8338 FAQs - Documents - Amplifiers - EngineerZone (analog.com)
Thanks and regards,
JE