ADS1147: If there is any risk to use the SPI with 2.1M-2.3M SCLK to communicate with ADS1147

Matthew Chen

Part Number: ADS1147

Hi Team,

The SPI SCLK is from uC is around 2.1M-2.3M(477ns), which works well for now to communicate with ADS1147, but the min SCLK is 488ns from the datasheet. If there is any risk to use this frequency?

Thanks a lot

Matthew Chen

11 months ago

0 Bryan Lizon86 11 months ago

TI__Mastermind 47091 points

Hi Matthew Chen,

Can you please help us track this opportunity by posting the customer name in the Notes section of the Thread Tracking Toolkit?

-Bryan

0 Matthew Chen 11 months ago in reply to Bryan Lizon86

TI__Intellectual 1340 points

Hi Bryan,

sure, please check the notes.

Matthew

0 Bryan Lizon86 11 months ago in reply to Matthew Chen

TI__Mastermind 47091 points

Hi Matthew Chen,

Thanks for providing the requested information

To answer your question: the ADC should never be operated outside of the Recommended Operating Conditions. Otherwise performance and behavior are not guaranteed. Therefore, the customer should not choose an SCLK period that is less than (<) the 488ns minimum stated in the datasheet. The ADC has specific internal timing needs and an SCLK that is faster than recommended can cause issues

-Bryan

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ADS1147: If there is any risk to use the SPI with 2.1M-2.3M SCLK to communicate with ADS1147