INA117

SBOS154A

12

FIGURE 13. Offsetting or Boosting Common-Mode Voltage Range for Reduced Power-Supply Voltage Operation.

2

3

81

5

6

V

3

V

2

INA117

4

INA105

4

2

7

7

5

6

1

V

+9V

–9V

3

380k

Ω

380k

Ω

380k

Ω

21.1k

Ω

20k

Ω

25k

Ω

25k

Ω

25k

Ω

25k

Ω

V

+50V to +200V

(V

(a)

2

3

81

5

6

V

3

V

2

INA117

4

INA105

25k

Ω

25k

Ω

25k

Ω

10k

Ω

21.1k

Ω

380k

Ω

380k

Ω

380k

Ω

20k

Ω

25k

Ω

4

2

7

7

5

6

1

V = V – V

O

3

2

+9V

–9V

(V–) +3.3V

1N4684

3.3V

3

V

–12V to +200V

(V

(b)

380k

Ω

380k

Ω

20k

Ω

380k

Ω

21.1k

Ω

R

7

1M

Ω

R

8

1M

Ω

2

3

81

5

6

V

3

V

2

INA117

INA105

25k

Ω

25k

Ω

25k

Ω

25k

Ω

2

5

6

1

V

13.7k

Ω

(V = ±9V)

S

OPA602

3

V

(V

(c)

–3V > V

2 and 3 for +4V > V

0V > V

2 and 3 for +4V > V

Refer to Application Bulletin AB-015 for details.