10

®

OPA241, 2241, 4241

OPA251, 2251, 4251

R

L

10

Ω

A1

OPA241

+

R

1

38.3k

Ω

R

3

38.3k

Ω

R

5

383k

Ω

R

6

10k

Ω

R

7

9.09k

Ω

R

4

20k

Ω

R

2

19.1k

Ω

A2

OPA241

R

8

100k

Ω

R

H

10

Ω

I

H

V+

V–

V+

V–

2.7V to ±15V

V+ for A

–In

+In

–In

+In

V

To Load

To Load

V

Common-mode range of A2

extends to V– for low-side sensing.

Optional for I

(R

R

common-mode input to A1.

Low-Side

Current Sense

High-Side

Current Sense

Out

Out

NOTE: Low and high-side sensing circuits can be used independently.

V– for A

I

L

FIGURE 5. Low and High-Side Battery Current Sensing.

R

S

5k

Ω

OPA241

C

L

V

IN

V

OUT

FIGURE 4. Series Resistor in Unity Gain Configuration Improves Capacitive Load Drive.