7.4 Device Functional Modes

7.4.1 Negative Reference Voltage

For applications requiring a negative and positive reference voltage, the OPA703 and REF30 can be used

to provide a dual-supply reference from a ±5V supply. Figure 7-3 shows the REF3025 used to provide a

±2.5V supply reference voltage. The low offset voltage and low drift of the OPA703 complement the low drift

performance of the REF30 to provide an accurate resolution for split-supply applications.

OPA703

REF3025

+5 V

-5 V

+5V

10 kW

10 kW

+2.5 V

-2.5 V

Copyright © 2016, Texas Instruments Incorporated

Figure 7-3. REF3025 Combined With OPA703 to Create Positive and Negative Reference Voltages.

REF30, REF30E

SBVS032J – MARCH 2002 – REVISED JULY 2025

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