Level shift 4v peak to peak to 0 - 3.3V
Based on this post, a summing amplifier could work. Adjusting the values, the schematic would be as follows:







simulate this circuit &ndash; Schematic created using CircuitLab

The output is calculated just like a non-inverting amplifier. Thus, when the sine wave is +2V, the terminals of the op-amp are at 2V. Since

\$V_O = V_I(1+\frac{R_4}{R_3})\$

the output will be 3.3V. When the sine wave is -2V, the terminals will be 0V, since the two voltage sources, \$R_1\$, and \$R_2\$ act as a voltage divider. Then the output will also be 0V.

The caveat here is that you need a rail to rail op-amp, or supply voltages that are less than 0V and greater than 3.3V. Otherwise the op-amp will clip the output.