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Forum Post: RE: DAC37J84EVM: Using the DAC37J84EVM at input data rates over 368.64 MSPS

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Hi Kang, thanks for the reply. The issue I was having was at an interpolation of 1 with all 8 SerDes lanes enabled, at an input sample rate of 737.28 MSPS. Such a configuration should yield an output sample rate of 737.28*interpolation = 737.28*1 MSPS, which is within the 1.6 MSPS limit of the DAC37J84 . Turns out the issue was my power supply, which was unable to provide the necessary current required for use of all 8 SerDes lanes. Using only 4 SerDes lanes resulted in a current draw within the range of my power supply, which is why the system seemed only to work with 4 lanes. Jon.

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