ADR360/ADR361/ADR363/ADR364/ADR365/ADR366

Rev. D | Page 17 of 20

APPLICATIONS INFORMATION

BASIC VOLTAGE REFERENCE CONNECTION

The circuit in Figure 33 illustrates the basic configuration for

the ADR36x family. Decoupling capacitors are not required for

circuit stability. The ADR36x family is capable of driving

capacitive loads from 0 μF to 10 μF. However, a 0.1 μF ceramic

output capacitor is recommended to absorb and deliver the

charge, as is required by a dynamic load.

1

2

3

NC

GND

ADR36x

5

4

TRIM

INPUT

0.1µF

OUTPUT

0.1µF

Figure 33. Basic Configuration for the ADR36x Family

Stacking Reference ICs for Arbitrary Outputs

Some applications require two reference voltage sources, which

are a combined sum of standard outputs. Figure 34 shows how

this stacked output reference can be implemented.

NC

NC

GND

GND

ADR36x

ADR36x

TRIM

TRIM

1

1

2

2

3

3

5

5

4

4

C1

0.1µF

C2

0.1µF

Figure 34. Stacking Voltage References with the ADR36x

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

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

two voltages that supply the required outputs (see Table 10). For

Table 10. Output

U1/U2

ADR361/ADR365

2.5

7.5

ADR361/ADR361

2.5

5.0

ADR365/ADR361

5

7.5

Negative Precision Reference Without Precision

Resistors

A negative reference is easily generated by adding an op amp,

therefore the negative reference can be taken directly from the

output of the op amp. The op amp must be dual-supply, low

offset, and rail-to-rail if the negative supply voltage is close to

the reference output.

NC

GND

ADR36x

TRIM

1

2

3

–

+

5

4

A1

Figure 35. Negative Reference