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ADS8688EVM-PDK: Layout questions

Oba
Genius 15960 points
Part Number: ADS8688EVM-PDK
Other Parts Discussed in Thread: ADS8694

Hello,

 

My customer is going to design their prototype with ADS8694 and they want to use ADS8688EVM-PDK as a reference.

 

Q1.

In the EVM’s users guide, there is only top and bottom layout information.

Is full layout information available?

 

Q2.

Is it 4-layers?

 

Q3.

Is the GND layer just a simple plane?

 

Q4.

Are the inner layers simple GND plane(same as Q3) and power layer like AVDD and DVDD?

 

Q5.

Are the GND plane of PHI board and ADC board simply connected through the connector?

 

Q6.

Is the ADC DVDD is the same VDD which is used for FPGA etc in the PHI board?

 

Regards,

Oba

  • +1
    TI__Guru 59126 points

    Hello Obata-san,

    The ADS8688EVM-PDK is actually a 4-layer board, but the layer plot images in the User Guide are missing the two internal layers. The second layer is a solid GND plane, and the third layer is partitioned between AVDD and DVDD. I've regenerated the EVM layer plots in the PDF below.

    ADS8688EVMA_PCB_LayerPlots.PDF

    The FPGA on the PHI controller board uses the same 3.3-V supply as well as other supply voltages.

    Regards,

    Ryan