AD7091R-8

Hello
I'm trying to set up communication with AD7091R-8. In setup I send following SPI command: 0X0CFF, 0X08FF, 0XFFFF, 0XFFFF, 0X00FF. Then I periodically send 0X0020 and I'm trying to read channel 5. I'd like to read one channeland them sequential readings. I inserted pictures from the logic analyzer into the attachment. I guess I'm getting bad data. Could you help me.

Thank you

Lukáš Mistr

attachments.zip
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  • Hi Jonathan,

    I have little progress. I can set the MUX, but when sending 0x0C40 I would expect switching to channel 6 but A / D will switch to channel 5. This is verified by hardware (changing the voltage to Vin5 and this voltage is on MUXout) and the software response (sending 0x0800 command and reply I get 0xA278). Everything is seen in figures.

    Regards,

    Mistr

Reply
  • Hi Jonathan,

    I have little progress. I can set the MUX, but when sending 0x0C40 I would expect switching to channel 6 but A / D will switch to channel 5. This is verified by hardware (changing the voltage to Vin5 and this voltage is on MUXout) and the software response (sending 0x0800 command and reply I get 0xA278). Everything is seen in figures.

    Regards,

    Mistr

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