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INA225

更新时间： 2024-11-14 01:05:47
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德州仪器 - TI /
页数 文件大小 规格书
33页 1617K
描述
36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series,Current-Shunt Monitor

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INA225  
SBOS612A –FEBRUARY 2014–REVISED MARCH 2014  
INA225 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series,  
Current-Shunt Monitor  
1 Features  
3 Description  
The INA225 is  
a voltage-output, current-sense  
1
•
Wide Common-Mode Range: 0 V to 36 V  
Offset Voltage: ±150 μV (Max, All Gains)  
Offset Voltage Drift: 0.5 μV/°C (Max)  
Gain Accuracy, Over Temperature (Max):  
amplifier that senses drops across current-sensing  
resistors at common-mode voltages that can vary  
from 0 V to 36 V, independent of the supply voltage.  
The device is a bidirectional, current-shunt monitor  
that allows an external reference to be used to  
measure current flowing in both directions across a  
current-sensing resistor.  
•
•
•
–
–
–
–
25 V/V, 50 V/V: ±0.15%  
100 V/V: ±0.2%  
200 V/V: ±0.3%  
Four discrete gain levels are selectable using the two  
gain-select terminals (GS0 and GS1) to program  
gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The  
low-offset, zero-drift architecture and precision gain  
values enable current-sensing with maximum drops  
across the shunt as low as 10 mV of full-scale while  
maintaining very high accuracy measurements over  
the entire operating temperature range.  
10-ppm/°C Gain Drift  
•
•
250-kHz Bandwidth (Gain = 25 V/V)  
Programmable Gains:  
–
–
–
–
G1 = 25 V/V  
G2 = 50 V/V  
G3 = 100 V/V  
G4 = 200 V/V  
The device operates from a single +2.7-V to +36-V  
power supply, drawing a maximum of 350 μA of  
supply current. The device is specified over the  
extended operating temperature range (–40°C to  
+125°C), and is offered in an MSOP-8 package.  
•
•
Quiescent Current: 350 μA (Max)  
Package: MSOP-8  
2 Applications  
Device Information  
•
•
•
•
•
•
Power Supplies  
ORDER NUMBER  
PACKAGE  
BODY SIZE  
Motor Control  
INA225AIDGK  
MSOP (8)  
3,0 mm x 3,0 mm  
Computers  
Telecom Equipment  
Power Management  
Test and Measurement  
RSHUNT  
5-V Supply  
Load  
CBYPASS  
0.1µF  
VS  
INA225  
IN-  
-
OUT  
REF  
ADC  
Microcontroller  
+
IN+  
GPIO  
GAIN SELECT  
GS0 GS1  
GAIN  
GND GND  
25  
50  
100  
200  
GND  
VS  
VS  
GND  
VS  
VS  
GND  
GS0  
GS1  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
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INA225 替代型号

型号 品牌 替代类型 描述 数据表
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