ADR130AUJZ-R2 datasheet(13/16 Pages) AD

13 / 16 page

ADR130

Rev. 0 | Page 13 of 16

APPLICATION NOTES

BASIC VOLTAGE REFERENCE CONNECTION

The circuits in Figure 32 and Figure 33 illustrate the basic

configuration for the ADR130 voltage reference.

GND

VIN

VOUT

SET

INPUT

OUTPUT

ADR130

0.1µF

Figure 32. Basic Configuration, VOUT = 0.5 V

GND

VIN

VOUT

SET

INPUT

OUTPUT

ADR130

0.1µF

Figure 33. Basic Configuration, VOUT = 1 V

STACKING REFERENCE ICs FOR

ARBITRARY OUTPUTS

Some applications may require two reference voltage sources

that are a combined sum of the standard outputs. Figure 34 and

Figure 35 show how these stacked output references can be

implemented.

GND

VIN

VOUT

SET

0.1µF

GND

VIN

VOUT

SET

INPUT

VOUT1

VOUT2

ADR130

0.1µF

Figure 34. Stacking References with ADR130, VOUT1 = 1.0 V, VOUT2 = 2.0 V

GND

VIN

VOUT

SET

0.1µF

GND

VIN

VOUT

SET

INPUT

VOUT1

VOUT2

ADR130

0.1µF

Figure 35. Stacking References with ADR130, VOUT1 = 0.5 V. VOUT2 = 1.5 V

Two reference ICs are used and fed from an unregulated input,

VIN. The outputs of the individual ICs that are connected in

series provide two output voltages, VOUT1 and VOUT2. VOUT1 is the

terminal voltage of U1, and VOUT2 is the sum of this voltage and

the terminal voltage of U2. U1 and U2 are chosen for the two

voltages that supply the required outputs (see Table 5). For

example, if U1 is set to have an output of 1 V or 0.5 V, the user

can stack on top of U2 to get an output of 2 V or 1.5 V.

Table 5. Required Outputs

U1/U2

Comments

VOUT1

VOUT2

ADR130/ADR130

See Figure 34

1 V

2 V

ADR130/ADR130

See Figure 35

0.5 V

1.5 V

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