+

+

±

+

±

IN OUT

REF2912

IN

OUT

REF2930

3.3 V

R2

R1

1.25 V

20 k

R3

3.0 V

VOUT

20 k

OPA317

100 k

10 k

3.0 V

1.25 V

3.3 V

IN+

IN±

SD_16

J1.2/A1+

J1.3/A1±

J1.5/VREF

0.625 V

C2

47 µF

R6

47 k

R7

47 k

VIN

±5 V

R4

A-ADC

R5

3.0 V

MSP430F2013

Launchpad

100 k

Copyright © 2016, Texas Instruments Incorporated

16

REF2912, REF2920, REF2925

REF2930, REF2933, REF2940

SBVS033C – JUNE 2002 – REVISED JUNE 2016

www.ti.com

Product Folder Links: REF2912 REF2920 REF2925 REF2930 REF2933 REF2940

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Copyright © 2002–2016, Texas Instruments Incorporated

Typical Application (continued)

Figure 30. Low-Power Reference and Bipolar Voltage Conditioning Circuit for Low-Power ADCs