REV. A

–14–

AD8225

Evaluation Board

Figure 13 is a schematic of an evaluation board available for the

AD8225. The board is shipped with an AD8225 already installed

and tested. The user need only connect power and an input to

conduct measurements. The supply may be configured for dual

A1

2

3

R3

100k *

R5

100k *

W3

W4

C1

0.1 F

C3

0.1 F

R4

100

R2

100

+IN

GND

–IN

C4

0.1 F

OUTPUT

R8

5

4

1

C2

0.1 F

W12

EXT_REF

W13

W11

W14

NOTES

REMOVE W3 AND W4 FOR AC COUPLING

*INSTALL FOR AC COUPLING

GND

C12

10 F, 25V

C11

10 F, 25V

W7

W6

C9

0.1 F

4

6

7

3

2

A1

C10

0.1 F

OFFSET

ADJ

R1

10k

R9

5.9k , 1%

R10

5.9k , 1%

C7

0.1 F

C8

0.1 F

CS2

J500

240 A

CS1

J500

240 A

AD707JN

USER-SUPPLIED

7

6

Figure 13. Evaluation Board Schematic

or single supplies, and the input may be dc- or ac-coupled. A

circuit is provided on the board so that the user can zero the

output offset. If desired, a reference may be applied from an

external voltage source.