AD7091R-8 Start up

Hello All

Please let me know your advice about start up sequence of AD7091R-8.

I think that I set register setting  as attached file after power up.

(write needed all register setting after default setting by reset pulse)

Is my understanding correct ?

If there is any register setting sequence after power up, (for example, we must set any register at first?)

could you give me advice.

And , If there is specified period of 1 and 2 described in attached file , please let me know it.

Regards,

Terumasa

  • 0
    •  Analog Employees 
    on Jul 30, 2014 4:14 AM

    Hi Terumasa,

         We are looking into this. We'll get back to you soon.

    Regards,

    Jonathan

  • 0
    •  Analog Employees 
    on Jul 30, 2014 10:53 PM


    Hi,

         Base fromyour attached file, the reset(1) should be Lo for  at least 10ns the same also applies between the rising edge of /RESET(2) and the falling edge of /CS. Once the device is reset, there is no specific sequence of registers that must be written.

         But please take note that at reset, the internal reference is disable. The REFin/REFout pin should be decouple with 2.2uF capacitor and is recommended to have a buffer. Make sure that the Reference has settle before taking conversion result. The settling time is dependent on the decoupling capacitor used on the Reference.

    Regards,

    Jonathan

  • Hello Jonathan

    Thank you for your answer.

    Regards,

    Terumasa