Data Sheet

OP400

Rev. H | Page 13 of 16

MULTIPLE OUTPUT TRACKING VOLTAGE

REFERENCE

Figure 34 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 µV/mA. Line regulation is better than 15 µV/V,

and output voltage drift is under 20 µV/°C. Output voltage

noise from 0.1 Hz to 10 Hz is typically 75 µV p-p from the

10 V output and proportionately less from the 7.5 V, 5 V, and

2.5 V outputs.

7.5V

10V

5V

2.5V

10kΩ

10kΩ

10kΩ

10kΩ

15V

22kΩ

10kΩ

1N4002

10kΩ

10kΩ

2μF

1μF

1μF

4

2

6

REF 43

2.5V

REFERENCE

1/4

OP400A

+

–

1/4

OP400A

+

–

1/4

OP400A

+

–

1/4

OP400A

+

–

Figure 34. Multiple Output Tracking Voltage Reference