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INA231

更新时间： 2024-11-13 12:25:11
品牌 Logo 应用领域
德州仪器 - TI 监控监视器
页数 文件大小 规格书
32页 448K
描述
High- or Low-Side Measurement, Bidirectional CURRENT/POWER MONITOR with 1.8-V I2C™ Interface

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INA231  
www.ti.com  
SBOS644 –FEBRUARY 2013  
High- or Low-Side Measurement,  
Bidirectional CURRENT/POWER MONITOR with 1.8-V I2C™ Interface  
Check for Samples: INA231  
1
FEATURES  
DESCRIPTION  
The INA231 is a current-shunt and power monitor  
23  
•
Bus Voltage Sensing From 0 V to +28 V  
with a 1.8-V compliant I2C interface that features 16  
programmable addresses. The INA231 monitors both  
shunt voltage drops and bus supply voltage.  
Programmable calibration value, conversion times,  
and averaging combined with an internal multiplier  
enable direct readouts of current in amperes and  
power in watts.  
•
High- or Low-Side Sensing  
Current, Voltage, and Power Reporting  
High Accuracy:  
•
•
–
–
0.5% Gain Error (Max)  
50-μV Offset (Max)  
•
•
•
•
•
Configurable Averaging Options  
Programmable Alert Threshold  
1.8-V I2C Compliant  
The INA231 senses current on buses that vary from 0  
V to +28 V, with the device powered from a single  
+2.7-V to +5.5-V supply, drawing 330 μA (typical) of  
supply current. The INA231 is specified over the  
operating temperature range of –40°C to +125°C.  
Power-Supply Operation: 2.7 V to 5.5 V  
Package: 1.68-mm × 1.43-mm, WCSP-12  
RELATED PRODUCTS  
DESCRIPTION  
APPLICATIONS  
DEVICE  
Current and power monitor with watchdog, peak-  
hold, and fast comparator functions  
•
•
•
•
•
•
•
•
Smartphones  
Tablets  
INA209  
INA210, INA211,  
INA212, INA213,  
INA214  
Zerø-drift, low-cost, analog current shunt monitor  
series in small package  
Servers  
Computers  
Zerø-drift, bidirectional current power monitor with  
two-wire interface  
INA219  
INA226  
Power Management  
Battery Chargers  
Power Supplies  
Test Equipment  
High or Low-side, bidirectional current and power  
monitor with two-wire interface and programmable  
alert  
HIGH-OR LOW-SIDE SENSING  
Power Supply  
(0 V to 28 V)  
CBYPASS  
0.1 mF  
VS  
BUS  
High-  
Side  
Shunt  
(Supply Voltage)  
INA231  
SDA  
SCL  
Power Register  
Current Register  
Voltage Register  
Alert Register  
´
Load  
V
I
I2C  
Interface  
ADC  
Low-  
Side  
Shunt  
ALERT  
A0  
A1  
GND  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
I2C is a trademark of NXP Semiconductors.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2013, Texas Instruments Incorporated  
 
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