• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 46 subscribers
  • Views 303 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS4229 EVM

theepak shoundra
Prodigy 50 points
Other Parts Discussed in Thread: ADS4229

I am using TI ADS4229 EVM board. The 4229 Ic is differential, but in EVM it is single ended.

I would like to know the relation between input analog voltage and output bits in EVM.

what is the swing range of of ads4229 in CMOS mode ?


I am not able to infer anything from EVM user guide regarding input analog voltage and output bit. I am not able to verify it because there is capacitor and a transformer which will block DC.

  • 0
    TI__Expert 8895 points

    Hi,

    The ADS42xxEVM family has LVDS DDR interface, which is differential, and you can modify EVM to CMOS interface. From schematic on the web, the signal name looks single ended but this is just the name of signal. At the LVDS connector side, those are connected to LVDS. The CMOS swing is 1.8Vpp.

    Thanks,

    KW

  • 0 in reply to KW Nam
    Prodigy 50 points

    Hi 

    Thanks KW. In EVM will the ADC analog input swing is from 0V to 1.8V ? Or -1.8V to 1.8V ?

    As it is 12 bit ADC whether  1V is mapped to (1/1.8)*4096 in offset binary mode ?

    Regards 

    S.Theepak

     

  • 0 in reply to theepak shoundra
    TI__Expert 8895 points

    Hi,

    If you referred to the swing of ADC analog input, please refer to the page 44 of datasheet. For a full-scale differential input, each input pin (INP and INM) must swing symmetrically between VCM + 0.5V and VCM - 0.5V, where common-mode voltage (VCM) is 0.95V.

    Thanks,

    KW