OPA241 Datasheet, PDF (10/10 Pages) Burr-Brown (TI) – Single-Supply, MicroPOWER OPERATIONAL AMPLIFIERS

R_S
5kΩ
OPA241
V_OUT
V_IN
C_L
FIGURE 4. Series Resistor in Unity Gain Configuration Improves Capacitive Load Drive.
R_H
10Ω
I_H
R₁
38.3kΩ
R₃
38.3kΩ
High-Side
Current Sense
R₅
383kΩ
V+
–In
A1
Out
+In ^OPA241
To Load
V_O = 10 • I_H • R_H
V+ for A₁, A₂
+
2.7V to ±15V
V– for A₁, A₂
R₆
10kΩ
R_L
10Ω
I_L
R₈
100kΩ
R₄
20kΩ
V–
R₂
19.1kΩ
R₂ and R₄ divide down the
common-mode input to A1.
V+
–In
A2
Out
+In ^OPA241
R₇ V–
9.09kΩ
Low-Side
Current Sense
Optional for I_B Cancellation
(R₇ = R₆ II R₈)
V_O = 10 • I_L • R_L
Common-mode range of A2
extends to V– for low-side sensing.
To Load
NOTE: Low and high-side sensing circuits can be used independently.
FIGURE 5. Low and High-Side Battery Current Sensing.
® _{OPA241, 2241, 4241}
OPA251, 2251, 4251
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