I am considering using a AD8293G80 as the front end for a DC current sensor, but I need a gain of ~50 rather than the preset gain of 80.
This amplifier has provision for adding an external filter capacitor to roll-off the gain, and according to the datasheet diagram that seems to be connected right across the amplifier feedback resistor.
Would it be possible to connect and external resistor in parallel with the filter capacitor to modify the DC gain for the amplifier without any major ill effects?
And if so, what would be a good TC spec ( ppm/C ) for the external resistor to approximate that of the internal resistor?
Thanks in advance for your help.
As mentioned on the thread that I linked on the previous post, you should also take a look at AD8237 and AD8240. They are also low-cost amplifiers that can be used in applications that require accurate gain and low drift.