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

R1

ADR510

+

–

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.

I

V

R1

(

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.