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DAC3162 time difference between DAC A and DAC B

Carlos
Intellectual 380 points
Other Parts Discussed in Thread: DAC3162, DAC3162EVM

I would like to generate two identical (or as identical as possible) signals out of DAC A and DAC B of the DAC3162, that is same amplitude, frequency and phase, so they are a replica of one another basically, or at least as close as possible. Is it safe to assume that this DAC3162 will output the samples at approx. the same time?, even though they are taken at its inputs at different times (interleaved)?, if so what is that maximum difference I should expect between the two if not negligible. The maximum frequency I am interested is 10MHz.

Thank you

  • 0
    TI__Guru* 91947 points

    Carlos,

    If you have a DAC3162EVM and a TSW1400EVM, you should be able to send a duplicated 10MHz test pattern to both channels and observe the outputs from both on an oscilloscope to observe the delay between the signals. If you do not, we can take this measurement for you. If you would like us to do this, please provide the frequency of the test signal and the sample rate of the DAC. 

    Regards,

    Jim 

  • 0 in reply to jim s
    Intellectual 380 points

    Thank you Jim,

    Could you please try two tests?: (I don't have those EVMs)

    Test 1: Two "identical" (duplicates) sinusoid signals at 10MHz, max. possible Amplitude, and sampling rate at 200 MSps

    Test 2: Two "identical" sinusoid signals at 30MHz, max. possible Amplitude, and the sampling rate at 500 MSps

    I am interested to see how "identical" the two sinusoids are in each in terms of amplitude, phase, and frequency. Relative set phase diff. between signals is zero, hopefully is also very close to zero when measured.

    Thank you,