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AD9910 DRG accumulator wrap around (phase ramp)

Question asked by jordens on May 26, 2017
Latest reply on May 30, 2017 by jordens

When using the DRG with the phase as the destination, and having the DRG limits at the maximum (0xffffffff) and minimum (0x00000000) of the 32 bit range, does the DRG accumulator overflow and wrap around or does it stop?

 

Or phrased in a different way, can I use a phase ramp from the DRG to add a small frequency offset?

 

Figure 38. Digital Ramp Generator Detail (http://www.analog.com/media/en/technical-documentation/data-sheets/AD9910.pdf#page31) would indicate that the DRG adder and accumulator support proper wrap-around as they both are exactly 32 bits wide.

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