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ADC128S102: What is total propagation delay and how is this affected by a system clock frequency outside of the recommended 8 - 16 MHz?

Raymond Mak
Prodigy 70 points
Part Number: ADC128S102


Hello,

I am trying to find the total propagation delay of the ADC128S102 and it seems as though that would be the "Throughput Time" which is defined in the AC Electrical Characteristics as a maximum of 16 SCLK cycles. Is this correct?

Additionally, our customer is using a system clock frequency of 4MHz which is outside of the Recommended Operating Conditions of 8 - 16 MHz. How does this affect the total propagation delay of the ADC128S102?

Thanks

  • 0
    TI__Mastermind 25030 points

    Hello,

    The customer is using a clock frequency not supported by the device, I suggest looking at the ADC128S052, which support the frequency they are looking for. 

    A propagation delay is the amount of time it takes for the start of the signal (in this case a bit change) to travel from the sender to the receiver, this depends greatly on the connection, such as cable length or PCB capacitance. In regards to this I would suggest looking at the hold time of the device to confirm data integrity. 

    The throughput would be defined as "rate of successful message delivery over a communication channel" in this case it is the frequency at which the digital communication is sent, and that would dictated by the clock frequency, 8 to 16Mhz, 

     

    Regards

    Cynthia