Hello guys am working on photodiode amplifier, and am playing with AD8033. From the datasheet, under section Input Overdrive (Rev D, pg. 16), it states that if the common mode input is within 3V of the positive power rail, the input stage switches to a bipolar mode.
I want to understand, how this switching to a bipolar mode behaves when operated with a single supply of 5V?
In my application, the AD8033 is used with a single 5V rail, as trans-conductance amplifier, with the non-inverting pin held at 2.5V; second AD8033 acts as an integrating servo to effectively AC couple the trans-conductance amplifier. It appears to power up into 2, linear modes of operation, In one mode, the output is correctly biased around 2.5V, but in the other it is biased at around 3.3V. This problem is not seen when tested with an 8V power rail.
