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ADC3564: NCO frequency change time

Kazuhiko Hirano
Genius 13218 points
Part Number: ADC3564

Hello,

After NCO frequency is written in the register via SPI, how much time does it take for the NCO to change its frequency to the written frequency from the previous frequency?

Best regards,

K.Hirano

  • 0
    TI__Intellectual 2280 points

    Hi Kazuhiko-san,

    It should not take long at all, and should go into effect immediately following the toggling of bits 1 and 5 in register 0x26. 

    Thus, with complex decimation, you could write 0xAA to set the gain and set bits 1 and 5 and then write 0x88 to complete the toggle of bits 1 and 5.

    Best regards,

    Drew