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ADS7047: Interfacing ADCs and DACs to Digital Signal Processors

Abe Hortillano
Prodigy 215 points
Part Number: ADS7047
Other Parts Discussed in Thread: DAC7571

I will use the ADS7047 in my proposed project together with the DAC7571. I have been studying the key parameters and characteristics of both the ADC and DAC. In putting these two devices on a single circuit, the resolution, n, must be equal to both devices for correct sampling and reconstruction of signals.

What other key parameters of both the ADC and DAC that need to be considered ( or must agree with each other, or must synchronize (I'm not sure of a better word to say it )) in the design of a circuit project, where two devices are employed?

Thank you.

  • 0
    TI__Guru**** 180791 points
    Hi Abe,

    The ADS7047 and DAC7571 are both serial devices, but the ADC uses an SPI interface and the DAC uses I2C - if you want some sort of synchronization between the two, it would be better (easier?) to use a DAC that also has an SPI interface, that way you could send data to the DAC while receiving data from the ADC using a single SPI port - you still won't be 100% 'in phase' on the DAC output with the ADC input, but you'll be closer than you would using two different protocols to talk to the parts. What sort of application is this project for?
  • 0 in reply to Tom Hendrick
    Prodigy 215 points
    Oh yes! I forgot that one: the communication protocol.

    I'm working on a mixed-signal test system. Thank you.