I have a quick question about a buffered voltage divider. I have two signals that can range from 0 to 5V that I need to scale down to 0 to 3V. I've chosen to do this with a voltage divider buffered through an opamp (schematic attached).
According to the data sheet, the output impedance of the voltage source is 470 ohms, and it wants at least 1 Mega Ohm of impedance on all analog and digital lines.
It seems to me that as long as the total equivalent resistance of the divider (R11 + R12) is ~1 mega ohm that the all will be well. Is this true or am I over simplifying it?
According to the data sheet, the output impedance of the voltage source is 470 ohms, and it wants at least 1 Mega Ohm of impedance on all analog and digital lines.
It seems to me that as long as the total equivalent resistance of the divider (R11 + R12) is ~1 mega ohm that the all will be well. Is this true or am I over simplifying it?
