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MAX9928

更新时间： 2024-11-15 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 1468K
描述
-0.1V至+28V输入范围、微功耗、单/双向电流检测放大器

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MAX9928 数据手册

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EVALUATION KIT AVAILABLE  
MAX9928/MAX9929  
-0.1V to +28V Input Range, Micropower,  
Uni-/Bidirectional, Current-Sense Amplifiers  
General Description  
Features  
● Wide -0.1V to +28V Common-Mode Range,  
The MAX9928/MAX9929 low-cost, uni-/bidirectional,  
high-side, current-sense amplifiers are ideal for monitor-  
ing battery charge and discharge currents in notebooks,  
cell phones, and other portable equipment. These devices  
feature a wide -0.1V to +28V input common-mode voltage  
Independent of Supply Voltage  
● 2.5V to 5.5V Operating Supply Voltage  
● 20μA Quiescent Supply Current  
● 0.4mV (max) Input Offset Voltage  
● Gain Accuracy Better than 1% (max)  
● SIGN Output Indicates Current Polarity  
range, low 20μA supply current with V  
less than 0.4mV,  
OS  
and a gain accuracy better than 1.0%. The input common-  
mode range is independent of the supply voltage, ensur-  
ing that the current-sense information remains accurate  
even when the measurement rail is shorted to ground.  
● Transconductance and Gain Versions Available  
• 5μA/mV (MAX9928F)  
The MAX9928F features a current output with a transcon-  
ductance ratio of 5μA/mV. An external resistor converts  
the output current to a voltage, allowing adjustable gain  
so that the input sense voltage can be matched to the  
maximum ADC input swing. The MAX9929F has a volt-  
age output and integrates a 10kΩ output resistor for a  
fixed voltage gain of 50V/V.  
• 50V/V (MAX9929F)  
● Pin Compatible with the MAX4372 in UCSP  
● Available in Ultra-Small, 3x2 UCSP  
(1mm x 1.5mm) and 8-Pin μMAX Packages  
Applications  
A digital SIGN output indicates direction of current flow, so  
the user can utilize the full ADC input range for measuring  
both charging and discharging currents.  
● Monitoring Charge/Discharge Currents in Portable/  
Battery-Powered Systems  
● Notebook Computers  
● General-System/Board-Level Current Monitoring  
● Smart-Battery Packs/Chargers  
● Precision Current Sources  
● Smart Cell Phones  
● Super Capacitor Charge/Discharge  
The MAX9928/MAX9929 are fully specified over the  
-40°C to +125°C automotive temperature range, and  
available in 6-bump UCSP™ (1mm x 1.5mm) and 8-pin  
μMAX® packages. The UCSP package is bump-to-bump  
compatible with the MAX4372_EBT.  
Pin Configurations and Typical Operating Circuit appear at  
end of data sheet.  
UCSP is a trademark and μMAX is a registered trademark of  
Maxim Integrated Products, Inc.  
Ordering Information  
PART  
OUTPUT TYPE  
Current  
GAIN  
PIN-PACKAGE  
8 μMAX  
TOP MARK  
MAX9928FAUA+  
MAX9928FABT+T  
MAX9929FAUA+  
MAX9929FABT+T  
G
G
= 5μA/mV  
= 5μA/mV  
—
+AAF  
—
m
m
Current  
3x2 UCSP  
8 μMAX  
Voltage  
A
= 50V/V  
= 50V/V  
V
V
Voltage  
A
3x2 UCSP  
+ADI  
Note: All devices are specified over the -40°C to +125°C operating temperature range.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
T = Tape and reel.  
19-4251; Rev 4; 9/14  
1234567...13

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