MCP4651 5Kohm DigitalPot used for Gain adjustment of an Opamp
Hi There, I will apreciate if i can resolve this problem of mine,
I have a NE5532 op-amp gain circuit attached (Digital Pot Connection.png) which is fed by +12 /-12 Volt in the rails. My input to the opamp Vin is a ground referenced 0.3 Vrms to 1.5 V rms audio signal. The MCP4651 P0A pin voltage is varying between 0.3 v rms or 1.5 Vrms according to the applied Audio signal level and is in the range of VDD/VSS voltage limits of the MCP4651.
The MCP4651 5 Kohm digital potentiometer is on rheostat mode and has 0 volt on the VSS pins and 3.3dc or 5 V dc ( not decided yet) on the VDD pins.
Question 1 - will the audio signal be amplified properly both positive and negative side with a gain of 2 to 33 dB with the MCP4651 5 kohm version which the digital pot is not fed with a symetrical +- 12 Vdc power supply but with a voltage of 5 V dc maximum without any problem?
Question 2 - The MCP4651 is communicating with pic32MX795 through I2C lines, and pic32 is on 3.3 V dc supply. Will MCP4651 have a problem on the communication if it is supplied with 5 Volt Dc.
Thank you for your comments.