mrmonteith
New member
Need some clarification on a statement. On the page for Using Analog Inputs it makes a statement:
Using Analog Inputs
"You can buy voltage reference chips in different voltages. 4.096 volts can be nice, because it gives a larger signal range, and each step of the ADC is exactly 4 mv. The external reference must be less than or equal to the power supply voltage. "
It says 4.094v reference would be nice. Yet it states that the external reference has to <= power supply voltage. The confusion is as I understand it all the Teensy boards use 3.3v. But how can you use a 4.094v reference when it's higher than the supply voltage?
Thanks
Michael
Using Analog Inputs
"You can buy voltage reference chips in different voltages. 4.096 volts can be nice, because it gives a larger signal range, and each step of the ADC is exactly 4 mv. The external reference must be less than or equal to the power supply voltage. "
It says 4.094v reference would be nice. Yet it states that the external reference has to <= power supply voltage. The confusion is as I understand it all the Teensy boards use 3.3v. But how can you use a 4.094v reference when it's higher than the supply voltage?
Thanks
Michael