I want to use an adxl326 accelerometer to measure vibration in one plane only. The accel is fed 3.3V and returns 1.65V at 0G's +/- 57mV/G
What I want to do is remove the 1.65 bias to get an ac signal then amplify that signal so it is close to -1.65 / +1.65 so that I can add tge bias back and have a dc signal again which is close to the full adc range of 0-3.3V
I considered using an AD8221 Inst amp with no gain resistance on pins 2 & 3 ie unity gain, followed by a PGA112 PGA with SPI control and 1.65V on the ref pin. However, I was wondering if anyone had any suggestions which would not need a -5 & +5 supply?
Please also remember I am an analog newbie!