Precision voltage reference delivers 80 mA

摘要

Large analog systems that present many loads to a voltage-reference source can often demand more current than a single reference IC can deliver. However, if the reference IC includes force and sense terminals, you can easily add a buffer to the circuit's feedback loop without affecting the reference's accuracy. For example, the circuit in Figure 1 provides the same 0.04 initial accuracy and 7-ppm/℃ temperature coefficient as IC{sub}1, a standalone MAX60.33. The buffer circuit delivers as much as 80 mA.