INA110

12

SBOS147A

www.ti.com

FIGURE 14. Input-Protected Instrumentation Amplifier.

FIGURE 15. High Common-Mode Voltage Differential

Amplifier.

FIGURE 17. Differential Input FET Buffered Current

Source.

FIGURE 18. Differential Input/Differential Output

Amplifier.

6

10

8

9

∆V

OUT

7

+15V

–15V

1

13

12

16

11

3

2

X10

X100

X200

X500

R

G

6

10

8

9

∆V

IN

7

1

13

12

16

11

3

2

X10

X100

X200

X500

R

G

+

–

INA110

INA110

3

16

1

2

6

10

INA110

9

V

OUT

R

2

–15V

7

8

+15V

X200

R

1

V

2

D

3

D

4

D

1

D

2

–15V

+15V

+15V

–15V

V

1

∆V

IN

For lower voltage, lower resistor noise:

R

1 = R2 = 20kΩ, D1 – D4 = FDH300 (1nA leakage)

For higher voltage, higher resistor noise:

R

1 = R2 = 100kΩ, D1 – D4 = 2N4117A (1pA leakage)

Matching of RCs on inputs will affect CMR, but

can be optimized by trimming R

1 or R2.

FIGURE 16. Digitally-Controlled Fast-Settling Programmable Gain Instrumentation Amplifier.

CODE

GAIN

TYPICAL 0.01% SETTLING TIME

00

10

6

µs

01

100

6

µs

10

1000

12

µs

3

13

1

2

6

10

INA110

9

V

OUT

–15V

7

8

+15V

X10

∆V

IN

8

6

2

15

PGA102

X10

1

16

+15V

7

–15V

13

4

3

X100

PGA Gain

Select

R

G

X100

3

12

1

2

6

10

INA110

9

V

OUT

10k

Ω

–15V

10k

Ω

7

8

+15V

990k

Ω

990k

Ω

∆V

IN

V

2

V

1

Common-mode range = ±1000V.

CMR is dependent on ratio matching

of external input resistors.

Overall G = 1

1

13

12

16

11

3

2

6

10

9

I

OUT

∆V

IN

X10

X100

X200

X500

R

R

G

–15V

7

8

+15V

1k

Ω

+15V

2N2222A

R

R

L

I

OUT = (∆VIN) (G) (1/10k + 1/R)

For 0mA to 20mA output, R = 50.25

Ω with (∆V

IN) (G) = 1V

INA110