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[FAQ] AMC1311: Can I use VOUTp only in a Single Ended configuration

Guru 133220 points
Tom Hendrick

Replies: 1

Views: 1178

Part Number: AMC1311

Yes! However, there are some things you need to consider:

  • The AMC1311 only has a positive input voltage range.
  • The AMC1311 has a gain of 1 V/V so the differential outputs will swing from a common mode of ~1.44 V +/- 1 V. VOUTp will go from 1.44 to 2.44 V while VOUTn goes from 1.44 to 0.44 V with a full scale positive input.
  • Using only VOUTp (or VOUTn) utilizes half of the AMC1311’s output voltage range, which reduces your Signal to Noise Ratio.
  • VOUTn should not be grounded! The output stage is actively driven, use a 10k Ω to ground or leave the pin float.
  • Variations of up to +/- 50 mV in common mode output voltage will appear as an offset and would require calibration.

 

 

Regards,

Tom

Guru 133220 points
Tom Hendrick
  • Guru 133220 points
    Tom Hendrick

    Check out this TechNote and the attached document for more details!  The same technique described there for the AMC1301 applies to the AMC1311 and the AMC3301.

    AMC1311_DIFF2SE.pdf

     

    Regards,

    Tom

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