setting up STM32H757 with ACD1 measuring at 3.3v
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‎2021-08-05 7:47 AM
Hi
i am using a STM32H757 with ACD1 measuring a voltage around 1.8v and adc2 at 3.3v, But my adc1 value is 1488 for 12 bit adc. Vref+ is at 3.3v and Vref- at ground. how do set the parameters to measure 3.3V adc? as i seem to be getting the wrong value.
- Labels:
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ADC
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STM32H7 Series
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‎2021-08-05 7:53 AM
>>as i seem to be getting the wrong value.
Of what?
1488 is more indicative of 1.19V, unless +VREF is 5V
What do you get when you measure 3.3V?
What is the source of these voltages?
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‎2021-08-05 7:59 AM
+Vref is set to 3.3v
-vref is gnd
adc 2 is measuring the supply
adc1 is measuring a voltage 20v which stepped down by resistors to 1.8v
