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TMS570LC4357: ADC sample rate

Neal Zhu
Expert 2470 points

Part Number: TMS570LC4357

Hi,

What's the sample rate of ADC,  Two 12-Bit Multibuffered Analog-to-Digital Converter (MibADC) Modules.

Thanks!

  • 0
    TI__Mastermind 27355 points

    Hello,

    This can be derived from the MibADC Timing Specifications table in the datasheet:

    The minimum sample and hold time + conversion time in 12-bit mode = 600ns. 

    Therefore, the theoretical maximum sampling rate = 1/600ns = 1.66 MSPS

    Please note this does not account for the delay between conversions (~4 VCLK cycles), the time for values to latch, and other delays in the ADC module. This also assumes using the minimum sample and hold time which you may want to increase depending on how low impedance your external circuitry is. 

    Hope this helps.