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AD9988 CDDC and FDDC

Category: Hardware
Product Number: AD9988
Software Version: API 1.2.2

Hallo,

I wonder if the CDDC and FDDC of AD9988 should be set the same to CDUC and FDUC?

First, I set CDDC and FDDC = 2x3,CDUC and FDUC = 2x3,JTX and JRX link can both be established.

Second, CDDC and FDDC = 3x2,CDUC and FDUC = 2x3,JRX link can be established, JTX can't.

Third, CDDC and FDDC = 6x1,CDUC and FDUC = 6x1,JTX and JRX link can both be established.

My configuration parameters are as follows:

ADC clk= DAC clk =3686.4MHz,ADC JESD204C:L=8, M=8, F=2, S=1, K=128, E=1, N=16, NP=16

Is there any limit that CDDC and FDDC of AD9988 should be set the same to CDUC and FDUC?

Top Replies

  • I wonder if the CDDC and FDDC of AD9988 should be set the same to CDUC and FDUC?

    not necessarily. you need to make sure that the serdes line rates on the DAC (Tx) and ADC (Rx) sides are matched…

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