Can someone recommend a DAC to use for generating a 100Hz sine wave? Ideally I need 5 outputs that can each be programmed to 100Hz but with different phases and amplitudes. Thanks
to add to what msamera said, you can get a better quality sinewave by adding more data points per period. This obviously requires writing more data to the DAC channels. The AD5628 and AD5668 are similar to the AD5629 and AD5669 but have an SPI interface which is faster than SPI. You should also have a look at the AD5676 and AD5676R which are newer parts with lower glitch which will help with SNR and THD+N
Your application would require more programming on your side. The software will be the one to tell the converter on how much it would need to change the outputs.
As for the DACs, You may want to take a look at AD5629R or AD5669R. They have 8 channels and can transfer data at the rate of 400kHz. You may want to take a look at the wide portfolio of DACs. I have narrowed it to 8 channels.
If your goal is a plane sine wave, you might benefit from a DDS synthesizer. This avoids the need to generate your sine wave with a microcontroller or so. You could have a look at the AD9106, which has many options and 4 (differential) outputs. I know this doesn't match your 5-output-requirement, but maybe you can be smart and use a 180deg phase shift of one of the DAC outputs. Maybe there are other multi-channel DDS synthesizers available.
Best regards, Max
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