I need ADC with really differential input and single supply.
-IN connected to reference point (REF/2)
+IN connected to input signal (+\- 2.5v)
I tried AD7684 but DataSheet tells that +IN and -IN MUST be in opposite phase to reference point. I used MCP3301 which is pin2pin compatible with AD7684 but allow any signals on inputs.
Now we need 500kS ADC and MCP3301 couldn`t achieve this.
Could you advice ADC or solution for AD7693 to adapt it to described use case.
Thank you in advance.
Thank you for replies.
As I see in data sheet ADC with pseudo-differerential input couldn`t convert voltage below GND.
For example AD7694. -IN should be connected to GND, and +IN should be between GND and VREF.
So I can't convert negative voltage. If it is right I don`t understand real difference between pseudo-differential and single-ended. In pseudo-differential ADC -IN could be connected to GND+\- 0.1v and that`s all?
May be I`m wrong?