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interference of ADC channels in STM32F103RCT6

jason110
Associate

HI everybody,I purchased this batch of MCUS and found a difference in performance compared to my previous batch 19+,
Unusual: The upper left corner is the standard source output setting, and the right side is the data detected by the product. Focus on the data corresponding to 440017, which changes with the voltage (420 and 0) and the phase (0.8 and -0.8). When the voltage is 0, the data is 0.0517, and when the voltage 420 is applied and the phase is -0.8. This data is 0.0557, when the voltage 420 phase is 0.8, this data is 0.0478, voltage 420, the value of the two symmetric phases, relative to the voltage 0 value difference, is basically positive and negative symmetric.

jason110_0-1736410161380.jpeg

jason110_1-1736410172201.jpeg

jason110_2-1736410182557.jpeg

Normal measured data, almost unchanged, not affected by the phase

jason110_3-1736410239227.jpegjason110_4-1736410247719.jpegjason110_5-1736410256173.jpeg

Thank you for your reply!

 

1 REPLY 1

@jason110 wrote:

I purchased this batch of MCUS and found a difference in performance compared to my previous batch 19+,


Where did you buy them?

Are you sure they are genuine?

 

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