ADR130 Analog Devices, Inc., ADR130 Datasheet - Page 13

• Manufacturer Part Number: ADR130
• Description: Precision Series Sub-band Gap Voltage Reference
• Manufacturer: Analog Devices, Inc.

APPLICATION NOTES
BASIC VOLTAGE REFERENCE CONNECTION
The circuits in Figure 32 and Figure 33 illustrate the basic
configuration for the ADR130 voltage reference.
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.
Figure 34. Stacking References with ADR130, V
INPUT
Figure 32. Basic Configuration, V
Figure 33. Basic Configuration, V
INPUT
INPUT
0.1µF
0.1µF
1
2
3
1
2
3
0.1µF
0.1µF
1
2
3
1
2
3
NC
GND
V
NC
GND
V
ADR130
ADR130
IN
IN
NC
GND
V
NC
GND
V
IN
IN
ADR130
ADR130
V
V
SET
OUT
U2
U1
SET
NC
OUT
NC
6
5
4
6
5
4
V
V
SET
SET
OUT
OUT
NC
NC
OUTPUT
OUTPUT
OUT
6
5
4
6
5
4
OUT1
0.1µF
0.1µF
OUT
= 0.5 V
= 1.0 V, V
= 1 V
0.1µF
0.1µF
V
V
OUT2
OUT1
OUT2
= 2.0 V
Rev. 0 | Page 13 of 16
Two reference ICs are used and fed from an unregulated input,
V
series provide two output voltages, V
terminal voltage of U1, and V
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
ADR130/ADR130
ADR130/ADR130
IN
Figure 35. Stacking References with ADR130, V
. The outputs of the individual ICs that are connected in
INPUT
0.1µF
0.1µF
1
2
3
1
2
3
Comments
See Figure 34
See Figure 35
NC
GND
V
NC
GND
V
IN
IN
ADR130
ADR130
OUT2
U2
U1
is the sum of this voltage and
V
V
SET
SET
OUT1
OUT
OUT
NC
NC
and V
6
5
4
6
5
4
OUT1
= 0.5 V. V
V
1 V
0.5 V
OUT2
0.1µF
OUT1
0.1µF
V
V
OUT2
OUT1
. V
ADR130
OUT2
OUT1
= 1.5 V
V
2 V
1.5 V
is the
OUT2