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DAC5675A-SP: Output compliance range - consequences of violating AVdd - 1 V

BRANDON BURGETT
Prodigy 70 points
Part Number: DAC5675A-SP

Tool/software:

Hello, 

In our application, we have performed a worst-case analysis and have found that the output voltage may dip below the AVdd - 1 recommendation for the output compliance voltage. We are using an AVdd of 3.3 V and the voltage in the analysis is projected to dip as low as 2.282 V, breaking the guidance by 18 mV. 

My question is: what are the consequences of going below the recommended voltage? Is there any risk of stress to the part? And what would we expect the output to look like if we get into this region? We are using this just to output binary data. 

Thanks,

Brandon

  • 0
    TI__Mastermind 22380 points

    Hi Brandon,

    We cannot guarantee or even comment on how the device will operate outside of recommended conditions. It is likely the output will be degraded in terms of linearity and distortion. Operating outside the specified voltage range can stress the internal components of the DAC and potentially lead to reduced reliability and a shorter lifespan of the device as well. My suggestion is to lower the AVdd supply slightly from 3.3V to something like 3.28V so your 2.282V will fall within the Avdd-1V range as in the datasheet. 

    Thanks, Chase