ADR510
Rev. B | Page 9 of 12
PRECISE NEGATIVE VOLTAGE REFERENCE
The ADR510 is suitable for use in applications where a precise
negative voltage reference is desired, including the application
detailed in
Figure 13.
Figure 14 shows the ADR510 configured to provide an output
of −1.0 V.
–1.0V
I
–V
DD
R1
ADR510
+
–
03270-014
Figure 14. Precise −1.0 V Reference Configuration
Because the ADR510 characteristics resemble those of a Zener
diode, the cathode shown in
Figure 14 is 1.0 V higher with
respect to the anode (V+ with respect to V− on the ADR510
package). Because the cathode of the ADR510 is tied to ground,
the anode must be −1.0 V.
R1 in
Figure 14 should be chosen so that 100 μA to 10 mA is
provided to properly bias the ADR510.
V
R1
DD
)(1 −−−
=
(5)
The R1 resistor should be chosen so that power dissipation is at
a minimum. An ideal resistor value can be determined through
manipulation of Equation 5.
