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DAC63204EVM: Output sin wave waveforms as AC voltage

Part Number: DAC63204EVM
Other Parts Discussed in Thread: DAC43608, DAC43508, DAC63204

Tool/software:

Hi,

・Can the DAC63204EVM output sin wave waveforms such as AC voltage? (50Hz, 60Hz, 5Vpp)

・Is it possible to connect two DAC63204EVMs to one PC and run them simultaneously?

・If more than 4 channels are required, can the DAC43508 and DAC43608 provide the same functionality?

BR,

Taku

  • Hi Murayama-san, 

    1.The DCA outputs a series of 24 codes to generate the sine wave. With a 5V reference (if we use VDD as the reference) the output will swing from 0.56V to 4.5V

    The frequency is set by this equation, with the following slew_rate options. This gives a frequency range of ~8Hz to 10.4kHz

    2. No, the computer can only recognize one EVM. Each EVM has an on-board controller that communicates with the DACs via I2C or SPI, and the GUI cannot recognize more than one. You can connect one EVM to the computer and wire the I2C signals from one EVM to the other to communicate with both EVMs over I2C with the GUI. The GUI allows you to select between the different I2C addresses. 

    3. No, the DAC43x08 family does not have the internal sine wave generator function. You can manually send DAC codes to generate a sine wave. 

    Best,

    Katlynne Jones

  • Hi,

    Is there any board that can produce a sin wave other than this one?

    Also, for multiple connections, when connecting via I2C, hardware wiring is required and only GUI configuration is required. Is it possible to control the implementation of the board-side program without the need?

    BR,

    Taku

  • Hi Murayama-san, 

    Any DAC can create a sine wave if you continuously write the DAC codes in a sine wave pattern. DAC63204 is the only devices that has an integrated sine wave generator. 

    The DAC63204EVM needs to be programmed once, and the configuration can be saved in memory. If you save the sine wave configuration in memory, the DAC will boot up with a sine wave every power cycle. If you do not want to use the GUI, you can write your own I2C or SPI code to configure the DAC63204 register settings. 

    Best,

    Katlynne Jones

  • Hi Jones,

    I have two questions.

    ・About the frequency of the sin wave
    The frequency can be changed by the settings in the part enclosed in the red circle in the attached image, but only the settings in this list can be selected. Is it possible to set with a more detailed resolution?

    ・Voltage change
    Is it possible to change the voltage setting when the Sin wave is output?

    BR,

    Taku

  • Hi Murayama-san, 

    1. No, those are the only timescale options we have in the device. 

    2. The codes are fixed as shown in one of my earlier responses. The sine wave generator cycles through these fixed set of codes. So, the only way to change the voltage would be to change the reference. We have an external reference option, VDD as the reference, or the internal 1.21V reference with 1.5x, 2x, 3x or 4x gain options. 

    Best,

    Katlynne