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MAX4378_12 PDF预览

MAX4378_12

更新时间: 2024-11-25 11:59:11
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11页 1218K
描述
Single/Dual/Quad, High-Side Current-Sense Amplifiers with Internal Gain

MAX4378_12 数据手册

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MAX4376/MAX4377/  
MAX4378  
Single/Dual/Quad, High-Side Current-Sense  
Amplifiers with Internal Gain  
General Description  
Features  
o 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 cur-  
rent monitoring is critical. These precision devices are  
offered in three fixed-gain versions of 20, 50, and 100:  
Sense Amplifiers  
o ±±.ꢀ5 Typical Full-Scale Accuracy  
o +3V to +28V Supply Operation  
o Adjustable Current-Sense Capability with External  
Sense Resistor  
o Buffered Output Voltage with 2mA Drive  
o 1mA (typ) Supply Current  
o 2.±MHz Bandwidth (Gain = +2±V/V)  
o Automotive Temperature Range (-4±°C to +12ꢀ°C)  
o High Accuracy +2V to +28V Common-Mode  
Range, Functional Down to ±V, Independent of  
Supply Voltage  
GAIN  
20  
SUFFIX  
T
F
50  
100  
H
For example, MAX4376TAUK is a single high-side  
amplifier with a gain of 20.  
o Three Gain Versions Available  
+2±V/V (MAX437_T)  
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  
battery pack in deep discharge.  
+ꢀ±V/V (MAX437_F)  
+1±±V/V (MAX437_H)  
o Available in Space-Saving ꢀ-Pin SOT23 (Single),  
8-Pin µMAX (Dual), and 14-Pin TSSOP (Quad)  
Ordering Information  
The full-scale current reading can be set by choosing  
the appropriate voltage gain and external-sense resis-  
tor. This capability offers a high level of integration and  
flexibility, resulting in a simple and compact current-  
sense solution.  
GAIN  
(+V/V)  
TEMP  
RANGE  
PIN-  
TOP  
PART  
PACKAGE MARK  
MAX4376TAUK+T  
20  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
5 SOT23  
5 SOT23  
5 SOT23  
5 SOT23  
5 SOT23  
8 SO  
ADOG  
MAX4376TAUK/V+T 20  
MAX4376FAUK+T  
MAX4376HAUK+T  
50  
ADOH  
ADOI  
AFGO  
The MAX4376/MAX4377/MAX4378 operate over a sup-  
ply voltage range of +3V to +28V, draw 1mA of supply  
current per amplifier, and operate over the full automo-  
tive temperature 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.  
100  
MAX4376HAUK/V+T 100  
MAX4376TASA+  
MAX4376FASA+  
MAX4376HASA+  
20  
50  
8 SO  
100  
8 SO  
Ordering Information continued at end of data sheet.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
/V denotes an automotive qualified part.  
T = Tape and reel.  
The MAX4376 is available in a tiny 5-pin SOT23 pack-  
age. The MAX4377/MAX4378 are available in space-  
®
saving 8-pin µMAX and 14-pin TSSOP packages,  
Pin Configurations  
respectively.  
Applications  
TOP VIEW  
+
Notebook Computers  
Current-Limited Power  
Supplies  
Fuel Gauges in PC  
General-System/Board-  
Level Current Monitoring  
Portable/Battery-Powered  
Systems  
Cell Phones  
Smart Battery Packages  
Automotive Current Detect  
Power Management  
Systems  
OUT  
GND  
1
2
3
5
RS-  
MAX4376  
V
CC  
4
RS+  
Battery Chargers  
SOT23  
PA Bias Control  
Pin Configurations continued at end of data sheet.  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-1781; Rev 7; 10/12  

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