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AM5728: ads8028 adc chip driver issue in x15-board

Part Number: AM5728
Other Parts Discussed in Thread: ADS8028, , ADS8528

Hi ti-expert,
I am using the x-15 board with P.D.S.K version). I configure the ADS8028 ti adc chip with SPI4.
Configuration with SPI4 I am writing DTS file for ADC.I read document of ADC ti site link is below.Mention in Document driver is needed
for communication.But driver is not available for ads8028.So help me regarding this issue.

link for ADC document


  • Hello,

    Can you share more information about your system?  Are you connecting the AM5728 to an ADS8028 board, or have you built a new board?  At this time the ADC team does not provide direct driver support or development but if you can share a schematic and some oscilloscope captures of what's going on we'll get it figured out.

  • Hi Collin,

    Thanks for reply.

    The schematic of ADS8028IRTJT adc chip in process.

    I have some question regarding x-15 board and ADS8028IRTJT adc chip. Please check below :

    1) If we connect x-15 borad with ADS8028 adc through SPI Protocol then how we can access the ADS8028 adc for reading sensor data,character file? Whether we should access through /dev/spidevX.X device ? or ADC access through /sys/bus/iio/device ?

    2) Can you please suggest any other adc chip which should be faster in getting adc data ?

    Note : Need to access or read multiple adc inputs like 8 channel or 16 channel.


  • Hello Ajay,

    Most people interact w/ the ADCs through the sys/bus/iio/device or generic SPI drivers since these are fairly simple devices and don't require a lot of overhead to work with.

    For higher channel counts at faster simultaneous sampling throughputs, consider the ADS8528 or ADS8686.  These are simultaneous sampling ADCs and can sample all the channels at once increasing the effective through put by the number of channels simultaneously sampled.