APPLICATION NOTE 5978

Amplifier IC Generates a Negative Voltage Reference with the Fewest Parts and a Single Supply Rail

By: Chapin Wong

Abstract: A negative voltage reference can be generated using a series voltage reference with an inverting amplifier. The MAX6010 series voltage reference used with the MAX9820 amplifier with integrated charge pumps as shown in the circuit in figure 1 to achieve this negative voltage reference using a single supply.