Beowolf
Full Member level 2
I need a working range switching circuit.
I know that it can be done wit analog switching IC (4066 and similiar).
But all I found are unipolar circuits (analg swithces cannot pass negative voltage).
So it comes to finding a circuit that will pass the negative voltage.
I found a version where the switching IC was powered with 0 - 5V and analog ground was set to 2.5V.
I am interesed if there are other solutions, or if that solution can be applied in a circuit that uses an SPI interfaced ADC.
Will the logic levels of the digital part of the ADC be altered if I pull upt the analog ground to 2.5V
I know that it can be done wit analog switching IC (4066 and similiar).
But all I found are unipolar circuits (analg swithces cannot pass negative voltage).
So it comes to finding a circuit that will pass the negative voltage.
I found a version where the switching IC was powered with 0 - 5V and analog ground was set to 2.5V.
I am interesed if there are other solutions, or if that solution can be applied in a circuit that uses an SPI interfaced ADC.
Will the logic levels of the digital part of the ADC be altered if I pull upt the analog ground to 2.5V