www.ti.com

WINDOW COMPARATOR

V =

H

R

2

R + R

1

2

(5)

V =

L

R

4

R + R

3

4

(6)

3V

A1

A2

D1

(2)

D2

(2)

R

5

10kW

R

6

5.1kW

R

7

5.1kW

R

IN

2kW

(1)

3V

3V

Q1

(3)

R

1

V

H

V

L

R

2

1/2

OPA2369

1/2

OPA2369

3V

V

OUT

V

IN

3V

R

3

R

4

NOTES: (1)R

protectsA1andA2frompossibleexcesscurrentflow.

IN

(2)IN4446orequivalentdiodes.

(3)2N2222orequivalentNPNtransistor.

ADDITIONAL APPLICATION EXAMPLES

R

1

V

EX

V

OUT

V

REF

R

1

OPA369

R

R

R R

+5V

OPA369

OPA2369

SBOS414A – AUGUST 2007 – REVISED SEPTEMBER 2007

Figure 27 shows the OPA2369 used as a window

threshold voltages are set as follows:

Therefore, both op amp outputs are at 0V as long as

in no current flowing through either diode, Q1 in

high.

Figure 27. OPA2369 as a Window Comparator

Figure 28 through Figure 32 illustrate additional application examples.

Figure 28. Single Op Amp Bridge Amplifier

Copyright © 2007, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Link(s): OPA369 OPA2369