9.4.2 Negative Reference Voltage

For applications requiring a negative and positive reference voltage, the REF4132 and OPA735 can be used to provide a dual-supply reference from a 5-V supply. Figure 19 shows the REF4132 used to provide a 2.5-V supply reference voltage. The low drift performance of the REF4132 complements the low offset voltage and zero drift of the OPA735 to provide an accurate solution for split-supply applications. Take care to match the temperature coefficients of R1 and R2.

Figure 19. REF4132 and OPA735 Create Positive and Negative Reference Voltages