• ADT7420 test procedure

    Q

    Our customer produces heat probes using ADT7420UCPZ. We gave the information
    that these sensors have 0.2C sensitivity and don't need calibration. To use
    this sensor in their calorimeter design, our local regulations require
    below information…

  • ADT7420 reading under Linux

    Q

    We design a new pcb with ADT7420.


    We verify  :

    -          the power supply : OK (3.3V)

    -          I2C waveform : OK (verify with oscilloscope)

    -          we can read other component connected to the same I2C bus example an
    EEPROM and a Demodulator.

    -          No communication…

  • ADT7420调试问题

    第一次用ADT7420，然后用的是之前就已经做好的模拟I2C的程序，之后也是按照数据手册的读写时序来做的。但是根本联不通，I2C两个引脚都是10K上拉，芯片17也接地了。

    不知道是哪里的问题，就换成了官方历程的I2C时序，但是还是，我来贴出我的代码，望指正。

    #define     ADT7420_ADDR         0x48         // Æ÷¼þ´ÓµØÖ·  A1:A0Ϊ 00  
    //#define     ADT7420_ADD…

  • ADT7420 wrong readback register value

    Hello,

    I'm using a ADT7420 Temperature converter on i2c bus which does not return correct values when I'm reading registers.

    For example, The value returned by the device when I'm reading the ID register ( @ 0x0B ) is 0x11 and the datasheet…

    • attachments.zip

  • How ADT7420 typical values are measured

    Q 

    According to data sheet, the typical accuracy is 0.0017 C. Where does this
    number come from? The repeatability number is a factor of ten higher.


     

    A 

    Yes, this is a bit confusing. But note this is just a typical value, and we are
    …

  • ADT7420 problem

    We're using ADT7420 in one of our boards.
    The chip is communicating properly, but the results it provides are clearly wrong (around 32C when the room is 24-25C).

    Some additional details:

    1. The chip is exposed to open air.

    2. The conversion formula…

  • RE: ADT7420

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: ADT7420 Timeout

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • ADT7320, ADT7420

    Q 

    Does the ADT7X20 need to be calibrated?

     

    A 

    No user calibration is required with these sensors because ADI pre-calibrates
    all devices using our high accuracy test solution.
    Because each device leaving the factory is fully calibrated, all…

  • RE: ADT7420 temerature sensor

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …