• AD7709: Choice of decoupling capacitors

    the DS recommends (p. 25 of rev0) 10uF tantalum // 100nF ceramic. For
    availability, reliability  and size reasons I would like to avoid tantalum.
    What do you think of a 10uF X5R ceramic instead of the recommended combination?
    What if I…
  • AD7709: Clock higher speed

    Is it possible to apply a clock higher than the specified 32.768kHz? How far a
    variation does the PLL support, and how does the noise performance evolve? Any
    data you could have?


    The AD7709 is intended for use with a 32.768KHz watch…
  • ADC Channel specs of AD7709

    I have a question about the ADC CHANNEL Specification of the AD7709. The Unit
    of the Full Scale Error is different for A Grade and B Grade. Is the value of
    0.75 "LSB typ" for the B Grade correct? Or is the correct Unit "% of Full …
  • AD7709: Series resistors into RTDs

    The AD70 being obsolete, we plan to use the AD7709 and we have two questions :

    1) One pin of our RTD is connected to gnd, so is it possible to connect one
    resistor in serie with RL1 and one in serie with RL2 to achieve a min common
  • AD7709: Clock source

    An answer to one question would be useful.  We have a 32768Hz source already
    on our board.  We are presuming that this can be fed straight into XTAL1 for
    the clock.  Is this correct?


    You can feed the clock source directly into pin XTAL1…
  • RE: AD7709 interface problem

    Hi prash,

    I have sent you some information via your private email which you should find useful. The example code is not intended to interface with the microcontroller you are using but it can help you get started.





    i do the same process:

    1. reset device,

    2. set filter

    3. read channel AINCON-AINCON ( before you replay, we thought need read zero shift data )

    4. read channel AIN1-AIN2

    and the code is exactly same with yours.

    Now, i found change SPI bus frequency…

  • AD7709用于ICP传感器,做高精度信号调理和AD转换,可行吗



  • AD7709: Using the device with an external current source to increase resolution

    I plan to use the AD7709 to read two temperature signals with two PT100. One
    application on data sheet shows a solution based on internal current source.
    However, in this way I can reach only a 20mV input range and, a 13bit
  • AD7709 转换结果读取问题》