Datasheet

ADR130 Data Sheet
Rev. C | Page 14 of 16
PRECISION CURRENT SOURCE
In low power applications, the need can arise for a precision
current source that can operate on low supply voltages. The
ADR130 can be configured as a precision current source (see
Figure 36). The circuit configuration shown is a floating current
source with a grounded load. The reference output voltage is
bootstrapped across R
SET
, which sets the output current into the
load. With this configuration, circuit precision is maintained for
load currents ranging from the reference supply current,
typically 85 µA, to approximately 4 mA.
1
2
3
6
5
4
NC
GND
V
IN
V
OUT
SET
NC
ADR130
06322-037
R
SET
V
IN
P1
R
L
Figure 36. ADR130 as a Precision Current Source