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Vs Current ( or Pdss) of AD9854ASTZ

Thread Summary

The user inquired about the meaning of three different maximum current specifications (865mA, 585mA, and 495mA) for the power supply on page 7 of the datasheet (Rev.F). The final answer explains that these values correspond to different operational conditions: all functions enabled, all functions except the inverse sinc filter, and all functions except the inverse sinc filter and digital multipliers, respectively. The inverse sinc filter, when disabled, reduces power consumption by approximately 30%.
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Category: Hardware
Product Number: AD9854

If looking at page 7 of datasheet(Rev.F) 

The following three types of numbers s are specified in Power Supply.

What does this mean?

Vs Current  865mA (MAX) , 585mA (MAX)  & 495mA (MAX) 

Toru 

Thread Notes

  • HI  ,

    The 3 of them were tested on different circumstances as stated in the foot notes below:

    Vs Current (11,12, 15): 
    * If all functions are enabled, not recommended to operate simultaneously with max temp of 85 Celsius and max internal clock frequency.

    * All functions engaged

    * Disabling inverse sinc filter reduce power consumption by approx 30 %

    Vs Current (11,13, 15):

    *If all functions are enabled, not recommended to operate simultaneously with max temp of 85 Celsius and max internal clock frequency.

    * All functions except inverse sinc engaged. 

    * Disabling inverse sinc filter reduce power consumption by approx 30 %

    Vs Current 14 : 

    * All functions except inverse sinc and digital multipliers are engaged. 

     All the best,

    Jules

  • Jules

    Hi Jules,

    I understood.

    Thank you for your kind assistant

    Toru