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ADS9234R: Sending Sampling Data over one SDO wire

Ralf Dumser
Prodigy 10 points
Part Number: ADS9234R

Hello,

we want to sample I and Q data simultaneously with this chip and then send the data via SPI. Is it possible or do you have a solution to send the data of both channels in one SDO wire so that the first 16 Bits are the data from channel a (I data) and the second 16 Bits are the data from channel b (Q data)? This woud make the data transfer to the µController simpler.

  • 0
    TI__Guru 57346 points

    Hello Ralf,

    Thank you for your post and welcome to our forum!

    Unfortunately, what you are describing is not possible with this device. The Legacy SPI mode outputs ADC_A data on SDO_A and ADC_B data on SDO_B only. In other words, at least one SDO pin must be used per ADC. The remaining options allow for various bus widths where each ADC's channel data is output on multiple SDOs in parallel to reduce the required interface clock speed from the host controller.

    Best regards,