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MAX4377

更新时间： 2024-11-26 14:57:39
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
13页 1764K
描述
单/双/四路、高边电流检测放大器，内部设定增益

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中文翻译

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MAX4377 数据手册

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Click here for production status of specific part numbers.  
MAX4376/MAX4377/  
MAX4378  
Single/Dual/Quad, High-Side  
Current-Sense Amplifiers with Internal Gain  
General Description  
Features  
● Low-Cost, Single/Dual/Quad, High-Side Current-  
The MAX4376/MAX4377/MAX4378 single, dual, and  
quad precision high-side current-sense amplifiers are  
available in space-saving packages. They feature  
buffered voltage outputs that eliminate the need for  
gain-setting resistors and are ideal for today’s notebook  
computers, cell phones, and other systems where  
current monitoring is critical. These precision devices are  
offered in three fixed-gain versions of 20, 50, and 100:  
Sense Amplifiers  
● ±0.5% Typical Full-Scale Accuracy  
● +3V to +28V Supply Operation  
● Adjustable Current-Sense Capability with External  
Sense Resistor  
● Buffered Output Voltage with 2mA Drive  
● 1mA (typ) Supply Current  
● 2.0MHz Bandwidth (Gain = +20V/V)  
● Automotive Temperature Range (-40°C to +125°C)  
GAIN  
20  
50  
SUFFIX  
T
F
H
● High Accuracy +2V to +28V Common-Mode Range,  
Functional Down to 0V, Independent of Supply Voltage  
100  
● Three Gain Versions Available  
+20V/V (MAX437_T)  
For example, MAX4376TAUK is a single high-side amplifier  
with a gain of 20.  
+50V/V (MAX437_F)  
High-side current monitoring is especially useful in  
battery-powered systems since it does not interfere  
with the ground path of the battery charger. The input  
common-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  
battery pack in deep discharge.  
+100V/V (MAX437_H)  
● Available in Space-Saving 5-Pin SOT23 (Single),  
8-Pin µMAX (Dual), and 14-Pin TSSOP (Quad)  
● AEC-Q100 Qualified, Refer to Ordering Information  
for the List of /V Parts  
Applications  
● Notebook Computers  
● Current-Limited Power Supplies  
● Fuel Gauges in PC  
● General-System/Board-Level Current Monitoring  
● Battery Chargers  
● Portable/Battery-Powered Systems  
● Cell Phones  
● Smart Battery Packages  
● Automotive Current Detect  
● Power Management Systems  
● PA Bias Control  
The full-scale current reading can be set by choosing the  
appropriate voltage gain and external-sense resistor. This  
capability offers a high level of integration and flexibility,  
resulting in a simple and compact current-sense solution.  
The MAX4376/MAX4377/MAX4378 operate over a supply  
voltage range of +3V to +28V, draw 1mA of supply current  
per amplifier, and operate over the full automotive tempera-  
ture range of -40°C to +125°C. These devices have a wide  
bandwidth of 2MHz, making them suitable for use inside  
battery-charger control loops. The buffered outputs drive  
up to 2mA of output current into a ground-referenced load.  
The MAX4376 is available in a tiny 5-pin SOT23 package.  
The MAX4377/MAX4378 are available in space-saving  
®
8-pin µMAX and 14-pin TSSOP packages, respectively.  
● Automotive  
Typical Operating Circuit  
I
LOAD  
V
SENSE  
0 TO +28V  
R
SENSE  
RS+  
RS-  
+3V TO +28V  
V
CC  
0.1µF  
MAX4376T/F/H  
A/D  
CONVERTER  
LOAD/  
BATTERY  
OUT  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
GND  
19-1781; Rev 13; 11/19  
1234567...13

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