-

2.5V

+2.5V

+5V

NOTE:Bypasscapacitorsnotshown.

R

1

10kW

R

2

10kW

-

5V

OPA735

+5V

DNC

TEMP

V

OUT

V

IN

GND

DNC

NC

TRIM/NR

REF5025

1 F

m

DNC

TEMP

V

OUT

V

IN

GND

DNC

NC

TRIM/NR

REF50xx

C

BYPASS

1 Fto10 F

m

m

C

L

1 Fto50 F

m

m

+V

SUPPLY

V

OUT

REF5010, REF5020, REF5025, REF5030

REF5040, REF5045, REF5050

SBOS410G – JUNE 2007 – REVISED NOVEMBER 2015

www.ti.com

Device Functional Modes (continued)

Figure 40. Basic Connections

9.4.2 Supply Voltage

The REF50xx family of voltage references features extremely low dropout voltage. With the exception of the

REF5020, which has a minimum supply requirement of 2.7 V, these references can be operated with a supply of

200 mV more than the output voltage in an unloaded condition. For loaded conditions, a typical dropout voltage

versus load plot is shown in Figure 6 in the Typical Characteristics.

9.4.3 Negative Reference Voltage

For applications requiring a negative and positive reference voltage, the REF50xx and OPA735 can be used to

provide a dual-supply reference from a 5-V supply. Figure 41 shows the REF5025 used to provide a 2.5-V supply

reference voltage. The low drift performance of the REF50xx 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

Figure 41. The REF5025 and OPA735 Create Positive and Negative Reference Voltages

18

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