I am planning to use this ADC to replace a TI ADC but I cant seem to find programming information in data sheet, i.e the commands to send over SPI. Any ADI engineer able to help?
Did r.daemon answer your question? The configuration register we are talking about is a 14-bit register, CFG[13:0], used to configure the ADC for the channel to be converted, the reference selection, and other
components. More details can be found in the Configuration Register, CFG section and Table 9 has the register bit details. As stated in the datasheet, "The register can be written to during conversio,n during acquisition, or spanning acquisition/conversion and is updated at the end of conversion, tCONV (maximum). There is always a one deep delay when writing the CFG register. Note that, at power-up, the CFG register is undefined and two dummy conversions are required to update the register."
Hope this helps.
Pages 24-30 of the AD7949 datasheet has details on the configuration register and general timings on all modes, with or without busy indicator for your reference.
Thank you for your reply. But what I am looking for is the command set to direct the ADC to measure a particular channel. Does ADI have this set of command available for AD7949?
i think you have to set the particular channel in the configuration register [9:7] and disable the sequencer
([2:1] = 00).
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