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MAX4072AUA+T

更新时间: 2024-11-29 13:10:31
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MAX4072AUA+T 数据手册

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19-2423; Rev 2; 1/03  
Bidirectional, High-Side, Current-Sense  
Amplifiers with Reference  
General Description  
Features  
Bidirectional, Compact, Current-Sense Solution  
Total Output Error Less than 1.5%  
The MAX4069–MAX4072 low-cost, bidirectional, high-  
side, current-sense amplifiers are ideal for monitoring  
battery charge and discharge currents in notebooks,  
cell phones, and other portable equipment. They fea-  
ture up to 24V input common-mode voltage range, low  
100µA supply current (which drops to only 10µA in  
shutdown), and a total output error of less than 1.5%.  
The wide 1.35V to 24V input common-mode range is  
independent of the supply voltage, ensuring that the  
current-sense feedback remains accurate even when  
connected to a battery pack in deep discharge.  
Selectable Gain of 50V/V or 100V/V  
Wide 1.35V to 24V Common-Mode Range  
Independent of Supply Voltage  
2.7V to 24V Single-Supply Operation  
Internal Precision Reference  
Adjustable (MAX4069)  
2.50V (MAX4070)  
To achieve maximum flexibility, an external current-sense  
resistor is used along with a Gain Select pin to choose  
either 50V/V or 100V/V. A single output pin continuously  
monitors the transition from charge to discharge and  
avoids the need for a separate polarity output. The  
MAX4070 contains an internal 2.5V reference. The  
charging current is represented by an output voltage  
1.50V (MAX4071)  
Low 100µA Supply Current  
10µA Supply Current in Shutdown  
Available in Space-Saving Packages  
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)  
8-Pin µMAX (MAX4070/MAX4071MAX4072)  
10-Pin µMAX (MAX4069)  
from 2.5V to V , while discharge current is given from  
CC  
2.5V to GND. The MAX4071 is similar, but with a refer-  
ence voltage of 1.5V. The MAX4069 has an adjustable  
reference voltage, set by two external resistors. The  
MAX4072 has an input for an external reference.  
Ordering Information  
TOP  
MARK  
PART  
TEMP RANGE PIN-PACKAGE  
The MAX4069/MAX4071/MAX4072 operate from a 2.7V to  
24V single supply. The MAX4070 operates from a 3.6V to  
24V single supply. All devices are specified over the  
automotive operating temperature range, -40°C to  
+125°C. The MAX4070/MAX4071/MAX4072 are available  
in 8-pin µMAX and 8-pin thin QFN packages. The  
MAX4069 is available in a 10-pin µMAX package.  
MAX4069AUB -40°C to +125°C 10 µMAX  
MAX4070AUA -40°C to +125°C 8 µMAX  
MAX4070ATA  
MAX4071AUA -40°C to +125°C 8 µMAX  
MAX4071ATA -40°C to +125°C 8 Thin QFN-EP*  
MAX4072AUA -40°C to +125°C 8 µMAX  
MAX4072ATA -40°C to +125°C 8 Thin QFN-EP*  
*EP = Exposed paddle.  
-40°C to +125°C 8 Thin QFN-EP*  
ABN  
ABO  
Applications  
ABP  
Notebook Fuel Gauging  
Smart-Battery Packs/Chargers  
Motor Control  
Typical Operating Circuit  
FROM BATTERY  
CHARGER  
Power-Management Systems  
Cell-Phone Battery-Current Monitoring  
R
SENSE  
V
= 1.35V TO 24V  
BATT  
Selector Guide  
RS-  
RS+  
LOAD  
SUPPLY  
VOLTAGE  
RANGE (V)  
COMMON-  
MODE RANGE  
(V)  
V
= 3.6V TO 24V  
V
CC  
CC  
PART  
REFERENCE  
MAX4070  
MAX4069  
MAX4070  
MAX4071  
MAX4072  
ADJUSTABLE  
2.5V  
2.7 to 24  
3.6 to 24  
2.7 to 24  
2.7 to 24  
1.35 to 24  
1.35 to 24  
1.35 to 24  
1.35 to 24  
GSEL  
OUT  
TO ADC  
1.5V  
SHDN  
REFOUT  
2.5V  
EXTERNAL  
GND  
Pin Configurations appear at end of data sheet.  
________________________________________________________________ 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.  

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