Hai ,Can any one suggest an ic to generate negative reference voltage for AD5545 to get positive o/p voltage from DAC of range 0 to 5V

Hai ,Can any one suggest an ic to generate negative reference voltage for AD5545 to get positive o/p voltage from DAC of range 0 to 5V.

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    •  Analog Employees 
    on Feb 2, 2018 6:09 AM

    Hi,

    May I know why you choose the AD5545? What is the application for the DAC you are going to use? 

    If you only want to get an output of 0-5V, you can use AD5689R which does not need an external amplifier.

    To answer your question, you have two options as we do not currently have a negative reference device:

    1) Use a positive reference in this configuration to create a negative potential on VREF

    2) add another opamp after the transimpedance amplifier to act as an inverter.

    Cheers,

    Ivan

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  • 0
    •  Analog Employees 
    on Feb 2, 2018 6:09 AM

    Hi,

    May I know why you choose the AD5545? What is the application for the DAC you are going to use? 

    If you only want to get an output of 0-5V, you can use AD5689R which does not need an external amplifier.

    To answer your question, you have two options as we do not currently have a negative reference device:

    1) Use a positive reference in this configuration to create a negative potential on VREF

    2) add another opamp after the transimpedance amplifier to act as an inverter.

    Cheers,

    Ivan

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