Other Parts Discussed in Thread: OPA344, OPA347, TLV2370
I have a variable frequency a.c. signal (0-100kHz, max 5V pk-to-pk) which is biased so that it is oscillating either side of a 2.5V d.c. offset. Therefore, the signal swings between 0 and 5V (as shown on the green trace in the oscilloscope graphic below). My op amp supply is 5V, single sided.
I wish to filter out components above 50Hz and would like to use a Sallen Key filter to implement this.
When I run a simulation of the circuit, I find that the filter output (shown on the orange trace in the scope graphic below) is clipping at approx. 3.42V.
If I increase the supply voltage to 7V, the clipping disappears. Why is this clipping occurring at 5V supply please? My understanding is that the LMC6041 output can swing rail-to-rail?
Is there a better way to design this circuit?
