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MAX4081

更新时间： 2024-10-25 22:35:23
品牌 Logo 应用领域
美信 - MAXIM 放大器
页数 文件大小 规格书
15页 409K
描述
76V, High-Side, Current-Sense Amplifiers with Voltage Output

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MAX4081 数据手册

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19-2562; Rev 0; 10/02  
76V, High-Side, Current-Sense Amplifiers with  
Voltage Output  
General Description  
Features  
The MAX4080/MAX4081 are high-side, current-sense  
amplifiers with an input voltage range that extends from  
4.5V to 76V making them ideal for telecom, automotive,  
backplane, and other systems where high-voltage cur-  
rent monitoring is critical. The MAX4080 is designed for  
unidirectional current-sense applications and the  
MAX4081 allows bidirectional current sensing. The  
MAX4081 single output pin continuously monitors the  
transition from charge to discharge and avoids the  
need for a separate polarity output. The MAX4081  
requires an external reference to set the zero-current  
o Wide 4.5V to 76V Input Common-Mode Range  
o Bidirectional or Unidirectional I  
SENSE  
o Low-Cost, Compact, Current-Sense Solution  
o Three Gain Versions Available  
5V/V (MAX4080F/MAX4081F)  
20V/V (MAX4080T/MAX4081T)  
60V/V (MAX4080S/MAX4081S)  
o
0.1ꢀ Full-Scale Accuracꢁ  
output level (V  
= 0V). The charging current is rep-  
o Low 100µV Input Offset Voltage  
SENSE  
resented by an output voltage from V  
discharge current is given from V  
to V , while  
CC  
REF  
to GND.  
o Independent Operating Supplꢁ Voltage  
o 75µA Supplꢁ Current (MAX4080)  
REF  
For maximum versatility, the 76V input voltage range  
applies independently to both supply voltage (V  
)
CC  
o Reference Input for Bidirectional OUT (MAX4081)  
o Available in a Space-Saving 8-Pin µMAX Package  
and common-mode input voltage (V  
). High-side  
RS+  
current monitoring does not interfere with the ground  
path of the load being measured, making the  
MAX4080/MAX4081 particularly useful in a wide range  
of high-voltage systems.  
Ordering Information  
PART  
TEMP RANGE  
-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  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
8 µMAX  
8 SO  
The combination of three gain versions (5V/V, 20V/V,  
60V/V = F, T, S suffix) and a user-selectable, external  
sense resistor sets the full-scale current reading and its  
proportional output voltage. The MAX4080/MAX4081  
offer a high level of integration, resulting in a simple,  
accurate, and compact current-sense solution.  
MAX4080FAUA  
MAX4080FASA  
MAX4080TAUA  
MAX4080TASA  
MAX4080SAUA  
MAX4080SASA  
MAX4081FAUA  
MAX4081FASA  
MAX4081TAUA  
MAX4081TASA  
MAX4081SAUA  
MAX4081SASA  
8 µMAX  
8 SO  
8 µMAX  
8 SO  
The MAX4080/MAX4081 operate from a 4.5V to 76V sin-  
gle supply and draw only 75µA of supply current. These  
devices are specified over the automotive operating  
temperature range (-40°C to +125°C) and are available  
in a space-saving 8-pin µMAX or SO package.  
8 µMAX  
8 SO  
8 µMAX  
8 SO  
8 µMAX  
8 SO  
Applications  
Automotive (12V, 24V, or 42V Batteries)  
Selector Guide appears at end of data sheet.  
48V Telecom and Backplane Current  
Measurement  
Pin Configurations  
Bidirectional Motor Control  
Power-Management Systems  
TOP VIEW  
Avalanche Photodiode and PIN-Diode Current  
Monitoring  
RS+  
1
2
3
4
8
7
6
5
RS-  
RS+  
1
2
3
4
8
7
6
5
RS-  
V
N.C.  
N.C.  
V
CC  
REF1A  
REF1B  
OUT  
CC  
General System/Board-Level Current Sensing  
Precision High-Voltage Current Sources  
MAX4080  
MAX4081  
N.C.  
GND  
N.C.  
OUT GND  
µMAX/SO  
µMAX/SO  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...15

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