AMP01

–13–

REV. D

VOLTAGE GAIN, G =

20

(

)

*

+15V

C1

0.047 F

+

C5

10 F

R5

*

*

SENSE

OUTPUT

REFERENCE

*

GROUND

R3

C4

0.047 F

+

C6

10 F

C2

0.047 F

VR1

100k

VR2

100k

400

+IN

–IN

200

200

741

+15V

–15V

GUARD

DRIVE

R2

1M

R1

1M

SIGNAL

GROUND

10k

C3

0.047 F

–15V

R4

NC

*

AMP01

NULL

NULL

V+

V–

15

14

6

13

12

7

18

1

2

3

16

17

4

5

10

11

8

9

7

6

4

3

2

Figure 31. AMP01 Evaluation Circuit Showing Guard-Drive Connection

HOLD

CAPACITOR

C = 0.047 F CERAMIC CAPACITORS

DIGITAL

DATA

OUTPUT

ANALOG

GROUND

DIGITAL

GROUND

ADC

C

C

7

8

9

OUTPUT

REFERENCE

SMP-11

SAMPLE AND HOLD

C

+

4.7 F

DIGITAL

GROUND

C

C

0V

+5V

DIGITAL

POWER SUPPLY

–15V

+15V

0V

ANALOG

POWER SUPPLY

C

C

AMP01

Figure 32. Basic Grounding Practice