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DAC8820: Bipolar Output Voltage

Ray Vincent Aranzaso
Genius 14595 points
Part Number: DAC8820

Hi,

Good Day. For the formula to calculate bipolar output voltage, how can we set the value of D and can you provide the coding sequence of DAC8820. Thank you very much.

Best Regards,

Ray Vincent

  • 0
    TI__Mastermind 28898 points

    Hi Ray,

    You can take a look at this figure from TIPD137:

    With a positive reference in the four quadrant figure (the blue regions), codes 0x0000 to 0x7FFF represent the negative output voltage, and codes 0x8000 to 0xFFFF represent positive voltage. 

    The DAC8820 controls are shown here:

    Set the value of D by setting all of the parallel inputs (D0-D15) with the 16-bit binary value for D. The sequence is shown in the timing diagram here:

    Set /WR low to write the 16 data bits to the input register while the parallel inputs are set correctly. Set LDAC high to load the DAC output register with the input register.

    Best,

    Katlynne Jones.