• • 11/12/2017
  • JeremY Ward

  DAC8218EVM: Design Files

  Part Number: DAC8218EVM

  I need the design package for the DAC8212EVM (schematic, BOM, gerbers, assembly drawings etc).  Is it online somewhere?

  Data converters forum Data converters
• • 10/17/2017
  • JeremY Ward

  DAC8218EVM: Output Voltage Range

  Part Number: DAC8218EVM

  What output voltage ranges does the DAC8218EVM support?  I need 0-20v output.  I was planning on using Unipolar mode.  Is this possible with this EVM?

  Documentation References:

  • In the DAC8218 data sheet in Features on page 1 the second bullet states "Unipolar Output: 0V to +33V".
  • In the DAC8218EVM data sheet in the Introduction on page 2 the 3rd paragraph states, "The DAC8218EVM is designed for unipolar and bipolar (default) modes of operation."
  • In the DAC8218EVM data sheet in "EVM Warnings and Restrictions" it states, "It is important to operate this EVM within the input voltage range of –16.5V to +21V and the output voltage range of –15V to +15V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM."

  Data converters forum Data converters
• • 11/18/2015
  • Matthew Sauceda

  RE: DAC8218 analogue output

  Howdy Harald,

  I think I stumbled upon your issue, and the behavior you are noticing may be a result of violating the absolute maximum ratings listed in page 2 of the DAC8218 DS.  The maximum voltage of REF-A and REF-B must be DVDD.  If the reference voltages exceed DVDD they can activate the internal ESD protective diodes of the device and sink large current, which can damage the device and affect performance.

  ABSOLUTE MAXIMUM RATINGS for REF-A/B:

  

  Please verify that the REF-A, REF-B pins are equal to or less than DVDD, as you previously mentioned a value of 4.096V for the reference, and just in the post above listed DVDD as 3.34V.  Please increase DVDD to 5V for correct operation while maintaining the conditions listed in the absolute maximum ratings table.

  For reference I've included my Lab Result, which was generated with the DAC8218EVM and DXP software. My supplies were configured as:

  DVDD/IOVDD:5V, REF-A:4.009V, AVDD=14V, AVSS=-14V. Gain set to default 6x.

  Frequency of saw-tooth waveform: 1kHz.  CH1: Vout0

  

  Best Regards,

  Matt

  Data converters forum Data converters

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