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PCM5100A-Q1: PCM5100A-Q1 VCOM, VREF mode

Ishihara Kenji
Prodigy 10 points
Part Number: PCM5100A-Q1


In the datasheet, there are references to "VCOM mode" and "VREF mode." Could you please explain in what usage scenarios or operating conditions these modes are intended to be used? 

8.3 Recommended Operating Conditions 

AVDD Analog power supply voltage range 
- VCOM mode 
- VREF mode 

  • 0
    TI__Mastermind 31271 points

    Hi Ishihara,

    Some DACs have Vref as well as Vcom mode. When using a DAC in VREF mode, the output-signal voltage is independent of the power-supply voltage. However, the full-scale output voltage in VCOM mode is proportional to the analog power supply AVDD used . I think this is a typo carried from a copy and paste and was left in datasheet unintentionally. 

    Regards,

    Arash