–10–

OP400

REV. A

MULTIPLE OUTPUT TRACKING VOLTAGE

REFERENCE

Figure 7 shows a circuit that provides outputs of 10 V, 7.5 V, 5 V,

and 2.5 V for use as a system voltage reference. Maximum

output current from each reference is 5 mA with load regulation

under 25

mV/mA. Line regulation is better than 15 mV/V and

output voltage drift is under 20

mV/∞C. Output voltage noise

from 0.1 Hz to 10 Hz is typically 75

mV p-p from the 10 V output

and proportionately less from the 7.5 V, 5 V, and 2.5 V outputs.

Figure 7. Multiple-Output Tracking Voltage Reference