I try choosing a DDS to generate ultra low frequency (10-4 hz to 400 Hz) sinus. Is there posible with a DDS working in thes frequencies??
DDS is a high resolution frequency divider that ranges from 24, 32, or 48 bits of frequency resolution. The lowest output frequency for the DDS = REF CLK frequency / 2^N; N = 24, 32, 48 depending the product number selection. You can run the DDS's REF CLK between it's min to max frequency range. Some DDS's REF CLK minimum frequency ranges are down to dc others are a couple to several MHz. Regardless, the DDSs with a min REF CLK down to dc can cover any low output frequency. So, I don't see an issue covering the ranges desired. Some DDSs to consider are the AD983x series, AD9954, AD9859, AD9911, and AD9913.
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