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adc12dj5200rfevm： Regarding the Full-Scale Voltage of the ADC12DJ5200RFEVM

ryota-miyamoto
Prodigy 120 points
Part Number: ADC12DJ5200RFEVM
Other Parts Discussed in Thread: ADC12DJ5200RF

Hi team.

I am currently using the ADC12DJ5200RF EVM along with the ADCxxDJxx00 GUI for my project. While utilizing the GUI, I have come across a query related to the Gain Full Scale settings for INA and INB.

In the GUI, I have observed that the Gain Full Scale settings allow me to configure up to 1040.000mVpo. However, my requirement involves measurements up to 1.2V. I am wondering if you could provide guidance on how to achieve this configuration within the GUI.

Best regards, 

ryota

  • +1
    TI__Mastermind 19825 points

    Hi Ryota,

    The max differential input voltage this device can be programmed for is 1060mV with FS_RANGE_A = FS_RANGE_B = 0xFFFF. To accept a 1.2V Vpp-diff signal, the input network must contain an attenuator to reduce the 1.2Vpp-diff signal to an acceptable range. The input network on this EVM contains a lossy balun as well as 3dB attenuator, input network attenuation is likely close to 4.5dB, so you should be able to apply this signal without issue to the EVM input.

    Regards, Chase