REF1112

6

SBOS283C

www.ti.com

FIGURE 5. Adjustable Voltage Shunt Reference.

For applications requiring a stable voltage reference ca-

pable of sinking higher than 5mA of current, a REF1112

combined with an OPA347 can sink up to 10mA of

current. This configuration is shown in Figure 5, and

through appropriate selection of R1 and R2, can be used

to provide a wide range of stable reference voltages. The

REF1112 is also useful for level shifting, and as shown in

Figure 6, can be used to achieve the full input range of an

analog-to-digital converter (ADC).

FIGURE 6. REF1112 Provides a Level Shift to Achieve Full ADC Input Range.

I

BIAS

2.5V

1.25V

0.1

µF

10k

Ω

R

1

10k

Ω

R

2

10k

Ω

OPA347

0.01

µF

V

V

S

R

SET

V

REF

V

IN

+V

−V

V

S

1.25V

0.1

µF

ADC

V

OUT