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MAX4372

更新时间： 2024-11-23 22:35:19
品牌 Logo 应用领域
美信 - MAXIM 放大器
页数 文件大小 规格书
8页 113K
描述
Low-Cost, SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output

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MAX4372 数据手册

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19-1548; Rev 0; 10/99  
Low-Cost, SOT23, Micropower, High-Side  
Current-Sense Amplifier with Voltage Output  
MAX4372TF/H  
General Description  
Features  
The MAX4372 low-cost, precision, high-side current-  
sense amplifier is available in a tiny, space-saving  
SOT23-5 package. Offered in three gain versions (T =  
+20V/V, F = +50V/V, and H = +100V/V), this device  
operates from a single +2.7V to +28V supply and con-  
sumes only 30µA. It features a voltage output that elimi-  
nates the need for gain-setting resistors and is ideal for  
today’s notebook computers, cell phones, and other  
systems where battery/DC current monitoring is critical.  
♦ Low-Cost, Compact Current-Sense Solution  
♦ 30µA Supply Current  
♦ +2.7V to +28V Operating Supply  
♦ 0.18% Full-Scale Accuracy  
♦ Low 1.5Ω Output Impedance  
♦ Three Gain Versions Available  
+20V/V (MAX4372T)  
High-side current monitoring is especially useful in bat-  
tery-powered systems since it does not interfere with  
the ground path of the battery charger. The input com-  
mon-mode range of 0 to +28V is independent of the  
supply voltage and ensures that the current-sense  
feedback remains viable even when connected to a 2-  
cell battery pack in deep discharge.  
+50V/V (MAX4372F)  
+100V/V (MAX4372H)  
♦ Wide 0 to +28V Common-Mode Range,  
Independent of Supply Voltage  
♦ Available in Space-Saving SOT23-5 Package  
The user can set the full-scale current reading by  
choosing the device (T, F, or H) with the desired volt-  
age gain and selecting the appropriate external sense  
resistor. This capability offers a high level of integration  
and flexibility, resulting in a simple and compact cur-  
rent-sense solution. For higher bandwidth applications,  
refer to the MAX4173T/F/H data sheet.  
Ordering Information  
TOP  
MARK  
PART  
TEMP. RANGE PIN-PACKAGE  
MAX4372TEUK-T -40°C to +85°C 5 SOT23-5  
MAX4372TESA -40°C to +85°C 8 SO  
MAX4372FEUK-T -40°C to +85°C 5 SOT23-5  
MAX4372FESA -40°C to +85°C 8 SO  
MAX4372HEUK-T -40°C to +85°C 5 SOT23-5  
MAX4372HESA -40°C to +85°C 8 SO  
ADIU  
—
Applications  
Power-Management Systems  
General-System/Board-Level Current Monitoring  
Notebook Computers  
ADIV  
—
ADIW  
—
Note: Gain values are as follows: +20V/V for the T version,  
+50V/V for the F version, and +100V/V for the H version.  
Portable/Battery-Powered Systems  
Smart-Battery Packs/Chargers  
Cell Phones  
Typical Operating Circuit  
Precision-Current Sources  
Pin Configurations  
I
LOAD  
TOP VIEW  
GND  
RS-  
MAX4372T/F/H  
GND  
OUT  
V
1
2
3
4
8
7
6
5
RS+  
N.C.  
RS-  
1
2
3
5
4
RS-  
CC  
LOAD/  
BATTERY  
A/D  
CONVERTER  
R
V
SENSE  
SENSE  
OUT  
N.C.  
GND  
OUT  
MAX4372T/F/H  
MAX4372T/F/H  
V
CC  
+2.7V TO +28V  
V
RS+  
N.C.  
CC  
V
CC  
RS+  
0.1µF  
V
IN  
SO  
0 TO 28V  
SOT23-5  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
12345678

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