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ADS1252 Conversion cycle

kittanadon keawratchakit
Prodigy 10 points

Other Parts Discussed in Thread: ADS1252

Dear all,

I'm use ADS1252, but i don know how to calculate convertions time?

 CLK use PWM 0.384000 Mhz  ,data rate about 1Khz   So (384 * MCLK)  MCLK is ?

Thank you and regards,

  • 0
    TI__Mastermind 44770 points

    Hi Kittanadon,

    The system clock is divided by 6 to give the modulator sampling frequency. Then the modulator over samples the input by 64. Therefore, the conversion time/data rate will be 1/384th (6*64 = 384) of the system clock frequency. 

    Therefore:

    • system clock period: 1 / 0.384 MHz = 2604.1667ns
    • conversion time: 384 * 2604.1667ns = 1us
    • sampling rate: 1 / 1us = 1kHz

    Regards,
    Chris