• AD7708

    使用AD7708时发现,偶尔设备重新上电,CPU采集到AD7708输出的码值为全0或都32767.不知道是怎么回事,大部份时间芯片能正常工作,就是上电的时候会出现所有通道采集到的值都不变,一直是0或32767.以下是硬件和程序。断电后重新启动故障消失,芯片工作正常。

    这是硬件连接,基准电压是2.5V,单端方式工作。

    INT8U channel2[10] = {0x0f,0x1f,0x2f,0x3f,0x4f,0x5f,0x6f,0x7f,0xef,0xff};  //0-10v==0-65…

  • AD7708: FAQs

    What precautions, if any, should I take to use external clock source instead of
    crystal/resonator?

     

    You can apply a 32768 Hz oscillator signal to the XTAL1 pin - see the input
    specifications on page 5 of the datasheet.
    The PLL should be able…

  • AD7708 and Arduino

    Hello All,

    Does anyone know if AD7708 can interface with Arduino using the SPI interface? Looking through the datasheet, other microprocessors are mentioned but the not the Arduino. Thank you!

    AD7708_7718.pdf

  • AD7708: Update rate

    In this case,  I have to use ad7708 confidured as 315Hz to achive 20Hz reading
    for each channel in chop disable mode. But I have a doubt that, I'll confugure
    it as 315Hz o/p rate but will read it as 100Hz. If so how peak-to-peak
    resolution…

  • Linduino and AD7708 ADC

    Dear Analog Devices,

    Is the Linduino programming library compatible with the AD7708 ADC? 

    Thanks,

    toshiyo

  • AD7708 sample code

    Hello, Sir:

    Have any AD7708 sample code or initial code availabe on Website?

  • AD7708 absolute ratings

    Hello there,

    I have a question about the absolute ratings of the AD7708.

    According to the datasheet:

    AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . –5 V to +5 V

    Typically, in my design: the AVDD is a 5.7V and DVDD at 3.3V; within the…

  • AD7708 and ADUC848 crystals

    Hello,

    in our applications we are using 6pf and 12 pf watch crystals

    We don't recognize requirements for AD7708 oscillator. Have we to use a 6pf crystal, a 12pF one or we can use both without problems?

    Thank you for your help

    Andrea Gonelli

  • AD7708采集非线性

    大家好,想请教一下大家在使用AD7708采集0-2.5V电压时,有遇到过采集的码值非线性情况吗,最近使用AD7708时,发现AD7708采集的码值是非线性的,用示波器看了模拟量回路的绞波VPP=85MV.请大家帮忙分析一下,是怎么回事以及怎样补偿?以下是测试数据。

       

    输入电流 采集码值 递增值
    0mA 18
    1mA 1512 1494
  • AD7708 strange behaviour at cold temperatures

     

    Hello there,

    With the AD7708, we are experiencing a strange behavior with sudden changes of temperature.

    If there is a rapid cooling of the device down to -40 Celsius, it happens that a reading is completely erroneous.

    This behavior happened when…