• AD7124-4/AD7124-8 FAQs

    Q1. The AD7124-4 and AD7124-8 have 3 power modes which one should I used?

    The end application will dictate the power mode to use.

    Common applications for the part are smart transmitters, process control input modules and low power or battery operated…

  • AD7124-4/AD7124-8: FAQs

    Question:

    What is the data output coding format used in AD7124-4/AD7124-8?

    Answer:

    On the AD124-4 & AD7124-8 sigma delta ADCs, two different coding options exist unipolar and bipolar coding. Unipolar coding is used to represent positive voltages only…

  • AD7124-8 conversion timeout

    We have a product that uses AD7124-8 to measure temperature. In small batch production, we found that some chips always prompt the error of conversion timeout. There are about 3 out of 1000 products reporting the error.

    1. We can read the chip ID correctly…

  • AD7124-4/AD7124-8: Internal reference Long term drift?

     Answer:

    Test Condition

     

    Long Term Drift (ppm/1000hrs)

     

    Package

    TSSOP

    Standard LFCSP

    B-Grade

    LFCSP

     

    No Bake

    Typ

    +/-23

    +/-89

    +/-49

     

    Max

    +/-96

    +/-134

    +/-88

     

    85’C Bake

    Typ

    +/-17

    +/-78

    N/A

    …

  • AD7124-8 write error

    AD7124-8 IC doesn't let me write the register values i want on the device. For example I can't start the device on full power mode or I can't change the AINM pins on the channels, it returns back to default AIN0 when i read back. 

    I can read…

  • FAQ: What is the equation for calculating Internal Temperature Sensor for AD7124-4/AD7124-8 in unipolar mode?

    FAQ: What is the equation for calculating Internal Temperature Sensor for AD7124-4/AD7124-8 in unipolar mode?

    For AD7124-4/AD7124-8 the sensitivity of the internal temperature sensor is 13,584 codes/°C, approximately when Vref = 2.5V. Both unipolar and…

  • FAQ. How to ensure synchronization of conversion between multiple AD7124-4/AD7124-8 devices?

    Answer: To ensure synchronization between multiple AD7124-4/AD7124-8 devices, the same master clock must be used for all devices. If the AD7124 internal clock has been used, then one ADC serves as the master and uses its own internal clock and this clock…

  • Is an IBIS model available for the AD7124-8?

    Q. Is an IBIS model available for the AD7124-8?

    A. There is an IBIS model available for the AD7124-8 that can be downloaded at the following link: http://www.analog.com/en/license/ibis-models?mediaPath=media/en/simulation-models/ibis-models/ad7124…

  • AD7124-8 Which power mode should I use?

    Q 

    AD7124-8 Which power mode should I use?

     

    A 

    Normally, the application dictates which power mode to use. Common applications
    for the part are smart transmitters, process control input modules and low
    power or battery operated instrumentation. For…

  • EVAL-AD7124-8-PMDZ input capacitors

    I bought the demo board mentioned in the title, but the input capacitors, namely C11-C26 of 100nF for the input are missing. https://wiki.analog.com/_media/resources/eval/user-guides/circuits-from-the-lab/02-058963-01-b.pdf They are drawn in the schematic…