• Pyadi-IIO documentation for setting and data output for AD7124-8

    Hi,

    I'm trying to get data with Python from EVAL-AD7124-8SDZ board connected to the Raspberry Pi over SPI.

    I'm using Kuiper Linux (23 February 2021 release candidate version).

    I have enabled SPI and added dtoverlay=rpi-ad7124-8-all-diff-cs0-int25…

  • 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

    Hi I am using AD7124-8.i have set only channel0 .  RDY  bit  Bit 7  of  STATUS REGISTER  never goes low after first  time i read data register.  for first time it shows 0 status .but once i read  data register then sets and  never goes to zero .  can you explain…

  • AD7124-4 AD7124-8 ESD on current output pins


    Hi,

    Is there a recommended ESD protection circuit for the current output pins on the AD7124-8?  I am using AIN0 and AIN1 to source 500uA of current to measure a 3 wire RTD.  Since these pins are directly wired off the chip and out of the board they will…

  • Current rating for AD7124-8 - external power supply

    Hello,

    I can't find a current rating for the AD7124-8 evaluation boards, only that the input voltage range is 7-9V. (It looks like the external power source is sent through a linear regulator (ADP1720), but I also couldn't find an input current for this…

  • AD7124-8 some RTDs read wrong temperature with higher RMS

    Hello,

    I must be completely out of my league with these A/D boards, because I keep running into issues reading a consistently valid temperature with them. I really need some help. Currently, I have 8 boards reading 5-8 RTDs set up in 2 wire configurations…

  • RE: Pyadi-IIO AD7124-8 example not working

    Hi,

    Most probably, you have an issue with the interrupt. What did you do with the DOUT/RDY signal? It should be connected to both SPI MISO and GPIO25 (https://github.com/analogdevicesinc/linux/blob/rpi-5.4.y/arch/arm/boot/dts/overlays/rpi-ad7124-8-all…

  • RE: 8 RDTtemperature sensors connection to AD7124-8. possible?

    Hi, 

    Have you seen this Reference Circuit? CN-0383 (Rev. C) (analog.com)

    This circuit note shows how to design a 2/3/4 wire RTDs. It also shows how many RTDs an AD7124-8 can be supported. Ideally, a single AD7124-8 can support up to 5 2/4 Wire RTDs. So…

  • 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

    …