OPA244 Datasheet, PDF (11/26 Pages) Burr-Brown (TI) – MicroPower, Single-Supply OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series

APPLICATIONS INFORMATION
The OPA244 is unity-gain stable and suitable for a wide
range of general purpose applications. Power supply pins
should be bypassed with 0.01µF ceramic capacitors.
OPERATING VOLTAGE
The OPA244 can operate from single supply (+2.2V to
+36V) or dual supplies (±1.1 to ±18V) with excellent
performance. Unlike most op amps which are specified at
only one supply voltage, the OPA244 is specified for real
world applications; a single set of specifications applies
throughout the +2.6V to +36V (±1.3 to ±18V) supply range.
This allows a designer to have the same assured perfor-
mance at any supply voltage within this range. In addition,
many key parameters are guaranteed over the specified
temperature range, –40°C to +85°C. Most behavior remains
unchanged throughout the full operating voltage range. Pa-
rameters which vary significantly with operating voltage or
temperature are shown in typical performance curves.
Useful information on solder pad design for printed circuit
boards can be found in Burr-Brown's Application Bulletin
AB-132B, “Solder Pad Recommendations for Surface-
Mount Devices,” easily found at Burr-Brown's web site
(http://www.burr-brown.com).
R_H
10Ω
I_H
R₁
38.3kΩ
R₃
38.3kΩ
High-Side
Current Sense
R₅
383kΩ
V+
–In
A1
Out
+In ^OPA244
To Load
V_O = 10 • I_H • R_H
V+ for A1, A2
+
2.2V to 36V
(±1.1V to ±18V)
R₈
100kΩ
R₄
20kΩ
R₂ ^V–
19.1kΩ
R₂ and R₄ divide down the
common-mode input to A1.
V– for A1, A2
V+
–In
A2
Out
+In ^OPA244
V_O = 10 • I_L • R_L
R₆
10kΩ
R_L
10Ω
R₇ V–
9.09kΩ
Low-Side
Current Sense
Optional for I_B Cancellation
(R₇ = R₆ II R₈)
Common-mode range of A2
extends to V– for low-side sensing.
To Load
I_L
NOTE: Low and high-side sensing circuits can be used independently.
FIGURE 1. Low and High-Side Battery Current Sensing.
®
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OPA244, 2244, 4244