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ADS8344 16-Bit, 8-Channel Serial Output Sampling Analog-to-Digital Converter

Other Parts Discussed in Thread: ADS8344


I am using Atmel SAME70Q21 MCU SPI interface to write into ADS8344, I have the following questions that I was wondering if you could please help me. 

1) Do you have any code samples for this configuration? Atmel SAME70+ADS8344?

2) Should I use internal clock or external clock from MCU in my design and what are the advantages and disadvantages of each?

3) Should I send 16 bit data or can I send two 8 bits if I am using the internal clock?

Can I please have a contact information to talk about this issue?

Thank you,


  • Hi Farzin,

    1) I am afraid we do not have codes specific to the controller you are using. However you could refer to the timing diagrams in Figure 5 (External clock mode) or Figure 6 (Internal clock mode). These diagrams are specifically referring to an 8-bit transfer with the host. 

    2) You may use either internal clock or external clock. Both these modes have their use cases.

    • Internal clock comes in handy when you want the data read clock rate to be independent of ADC's conversion time. You can operate the digital host at a given clock rate without affecting conversion time of the ADC.
    • External clock would be useful if you want to have control over overall frame.

    Depending the application constraints such as power, intermittent tasks and cycle time, you may choose to operate the ADC in either of the modes.

    3) Please refer to the timing diagram in Figure 6 (Internal clock mode). 

    Please feel free to post your queries on this forum. This helps others to benefit from the discussion.