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INA270

更新时间： 2024-11-21 04:23:07
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Voltage Output, Unidirectional Measurement Current-Shunt Monitor

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INA270 数据手册

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INA270  
INA271  
SBOS381 − FEBRUARY 2007  
Voltage Output, Unidirectional Measurement  
Current-Shunt Monitor  
FD EATURES  
DESCRIPTION  
The INA270 and INA271 family of current-shunt monitors  
with voltage output can sense voltage drops across  
current shunts at common-mode voltages from −16V to  
+80V, independent of the supply voltage. The INA270 and  
INA271 pinouts readily enable filtering.  
WIDE COMMON-MODE RANGE: −16V to +80V  
CMRR: 120dB  
D
D
ACCURACY:  
−
−
2.5mV offset (max)  
1% gain error (max)  
The INA270 and INA271 are available with two output  
voltage scales: 14V/V and 20V/V. The 130kHz bandwidth  
simplifies use in current-control loops.  
− 20µV/°C offset drift (max)  
− 55ppm/°C gain drift (max)  
D
D
BANDWIDTH: Up to 130kHz  
The INA270 and INA271 operate from a single +2.7V to  
+18V supply, drawing a maximum of 900µA of supply  
current. They are specified over the extended operating  
temperature range of −40°C to +125°C and are offered in  
an SO-8 package.  
TWO TRANSFER FUNCTIONS AVAILABLE:  
− 14V/V (INA270)  
− 20V/V (INA271)  
D
D
D
QUIESCENT CURRENT: 900µA (max)  
POWER SUPPLY: +2.7V to +18V  
PROVISION FOR FILTERING  
RS  
−
16V to +80V  
Supply  
Load  
AD PPLICATIONS  
Single−Pole Filter  
Capacitor  
POWER MANAGEMENT  
+2.7V to +18V  
D
D
D
D
D
D
AUTOMOTIVE  
TELECOM EQUIPMENT  
NOTEBOOK COMPUTERS  
BATTERY CHARGERS  
CELL PHONES  
PRE OUT  
BUF IN  
−
IN  
IN+  
V+  
Ω
5k  
Ω
5k  
WELDING EQUIPMENT  
OUT  
A1  
A2  
DEVICE COMPARISON  
DEVICE  
GAIN  
Ω
96k  
INA270  
INA271  
14V/V  
20V/V  
RL  
INA270  
GND  
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.  
All trademarks are the property of their respective owners.  
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ  
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ  
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ  
Copyright 2007, Texas Instruments Incorporated  
www.ti.com  
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