hi !
I finally read a lot on OPAMP because many values seen on tech-doc were completely unknown for me.
My choice for the op-amp is now Maxim MAX4167, this one is a rail to rail input and output op-amp ! While the input can vary from 0.0165V to 0.33V the rail to rail input aspect is very important. The MAX4167 have a 0.25mV-0.85mV Input Offset Voltage so my input voltage will be correctly processed. The Gain-Bandwith is around 36Mhz (input is 170Khz)
My problem is the op-amp gain. I use a non inverting amplifier so Vout = (1+(R2/R1))Vin
With a digital multimeter (and with arduino ADC), I sense a ~0.010V voltage. On the opamp output, voltage is "only" ~0.016V... Something is wrong somewhere because i expect somewhat x10 ? I double check R1 & R2 value everything seem to be okay.
What wrong with this ?
I can attach a photo of the breadboard if you need !
Thanks for your help.
BR
