®

PGA202/203

10

FIGURE 9. Floating Source Programmable Gain Instrumen-

tation Amplifier.

FIGURE 11. Programmable Differential In/Differential Out

Amplifier.

V

PGA203

8

7

1

2

4

11

12

V

OUT

1M

Ω

14

+

–

Gain Control

PGA202

8

7

4

11

12

+

–

V

IN

PGA202

8

7

4

11

12

+

–

1

1

2

2

V

OUT

A

0

A

1

PGA203

8

7

1

2

4

11

12

14

+

–

R

R

I

OUT

R

L

Gain Control

+V

CC

10k

Ω

FIGURE 12. Programmable Current Source.

PGA202

8

7

1

2

4

11

12

14

+

–

V

IN

PGA203

8

7

1

2

4

11

12

14

+

–

V

OUT

A

2

A

3

A

0

A

1

A

3

A

2

A

1

A

0

GAIN

00

0

0

1

00

0

1

2

00

1

0

4

00

1

1

8

01

0

0

10

01

0

1

20

01

1

0

40

01

1

1

80

1

0

0

0

100

1

0

0

1

200

1

0

1

0

400

1

0

1

1

800

1

1

0

0

1000

1

1

0

1

2000

1

1

1

0

4000

1

1

1

1

8000

FIGURE 13. Cascaded Amplifiers.

FIGURE 10. Low Noise Differential Amplifier with Gains of

100, 200, 400, 800.

PGA203

8

7

1

2

4

11

12

14

+

–

V

OUT

10k

Ω

10k

Ω

200

Ω

+

–

+

–

OPA27

OPA27

V

IN

Gain Control