ADR360/ADR361/ADR363/ADR364/ADR365/ADR366

Rev. D | Page 18 of 20

General-Purpose Current Source

Often in low power applications, the need arises for a precision

current source that can operate on low supply voltages. The

ADR36x can be configured as a precision current source (see

Figure 36). The circuit configuration illustrated is a floating

current source with a grounded load. The output voltage of the

current of the load. With this configuration, circuit precision is

maintained for load currents ranging from the reference’s

supply current, typically 150 μA, up to approximately 5 mA.

NC

GND

ADR36x

TRIM

1

2

3

5

4

R1

Figure 36. Precision Current Source

Trim Terminal

The ADR36x trim terminal can be used to adjust the output

voltage over a nominal voltage. This feature allows a system

designer to trim system errors by setting the reference to a

voltage other than the standard voltage option. Resistor R1 is

used for fine adjustments and can be omitted if desired. The

resistor values should be carefully chosen to ensure that the

maximum current drive of the part is not exceeded.

1

2

3

5

4

NC

GND

ADR36x

TRIM

R1

100k

Ω

POT

10k

Ω

R2

1k

Ω

Figure 37. ADR36x Trim Configuration