| Electronics > Beginners |
| SPI interfacing with AD5791 DAC via Raspberry Pi? |
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| imisaac:
Thanks RandallMcRee for the grounding suggestion. I am interested in the white noise floor (the flat part of the noise spectrum) of the AD5791. By "grounding" the DAC output, you meant to short the DAC output to the earth ground when it's on OR you meant to set the DAC output to zero volt? |
| imisaac:
Ok, I wrapped the enclosure all over with aluminum foil (see picture). The noise of the AD5791 evaluation board gets improved significantly (see plot). However, it is still somewhat worse than the AD5791 datasheet spec. Maybe i am now limited by my noise measuring device. Anyways, there are strange interference peaks on top of the white noise floor. Does anyone know how to remove these peaks? Thanks in advance. |
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