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LT1997-1

更新时间： 2024-11-30 14:57:55
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
30页 1500K
描述
精准、高电压、增益可选的差动 / 电流检测放大器

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中文翻译

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LT1997-1 数据手册

 浏览型号LT1997-1的Datasheet PDF文件第2页浏览型号LT1997-1的Datasheet PDF文件第3页浏览型号LT1997-1的Datasheet PDF文件第4页浏览型号LT1997-1的Datasheet PDF文件第5页浏览型号LT1997-1的Datasheet PDF文件第6页浏览型号LT1997-1的Datasheet PDF文件第7页 
LT1997-1  
Precision, High Voltage,  
Gain Selectable Difference/Current Sense Amplifier  
FEATURES  
DESCRIPTION  
Precision Gain: Up to 80V/V  
The LT®1997-1 is a difference amplifier that can be used to  
amplify small differential signals while rejecting large com-  
monmodesignalsmakingitanidealchoiceforcurrentsense  
applications. It combines a precision operational amplifier  
withhighly-matchedresistorstoformaone-chipsolutionto  
amplify and level shift voltages accurately using no external  
components. It comes with three standard pin-selectable  
gainoptions(10,20and50),whichcanbefurthercombined  
to form gains from 0.141 to 80 with accuracy of 0.012%  
(120ppm). The LT1997-1 also operates with input voltages  
n
n
n
n
n
n
n
n
n
n
n
n
n
–
–
Input Common Mode Voltage Range: V to V + 76V  
109dB Minimum CMRR (Gain = 10)  
0.012% (120ppm) Maximum Gain Error (Gain = 10)  
1ppm/°C Maximum Gain Error Drift  
2ppm Maximum Gain Nonlinearity  
Wide Supply Voltage Range: 3.3V to 50V  
Rail-to-Rail Output  
350µA Supply Current  
65µV Maximum Op Amp Offset Voltage  
650kHz –3dB Bandwidth (Gain = 10)  
Low Power Shutdown: 20µA  
–
–
+
between V and V + 76V (independent of V ), enabling  
robust operation in demanding industrial environments.  
Its excellent resistor matching results in a common mode  
rejection ratio of greater than 109dB (Gain = 10).  
Space-Saving MSOP and DFN Packages  
The resistors maintain their excellent matching over tem-  
perature;thematchingtemperaturecoefficientisguaranteed  
less than 1ppm/°C. The resistors are extremely linear with  
voltage, resulting in a gain nonlinearity of less than 2ppm.  
APPLICATIONS  
n
High Side or Low Side Current Sensing  
n
Bidirectional Wide Common Mode Range Current  
Sensing  
The LT1997-1 is fully specified at 5V and 15V supplies  
and from –40°C to 125°C. The device is available in space  
saving 16-lead MSOP and 4mm × 4mm DFN14 packages.  
All registered trademarks and trademarks are the property of their respective owners.  
n
High Voltage to Low Voltage Level Translation  
n
n
n
Industrial Data-Acquisition Front-Ends  
Replacement for Isolation Circuits  
Differential to Single-Ended Conversion  
TYPICAL APPLICATION  
Precision Wide Voltage Range, Bidirectional Current Monitor  
Typical Distribution of CMRR  
(G = 10)  
15V  
V
= –15V TO 61V  
SOURCE  
ꢀꢁ0  
+
ꢀꢀꢁ ꢂꢃꢄꢅꢆ  
ꢀRꢁꢂ ꢃ Rꢄꢅꢆ  
ꢀꢁꢂꢃꢄꢂꢅꢆ  
ꢀ
ꢀ ꢁꢂꢃ  
ꢀ
–INA –INB –INC  
V
LT1997-1  
ꢀ
ꢀꢁ  
ꢀ ꢁꢂꢃꢄ ꢅꢆ  
3k  
ꢀꢁꢂꢃꢄꢅꢄꢆ  
ꢀ00  
ꢀꢁ0  
ꢀ00  
ꢀ0  
7.5k  
150k  
15k  
15k  
–
+
OUT  
R
R
C
SENSE  
V
OUT  
= 10ꢀV/ꢀA  
1Ω  
1Ω  
7.5k  
3k  
300k  
REF2  
REF1  
300k  
LOAD  
0
–
ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ ꢀꢁ  
0
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
+INA +INB +INC  
SHDN V  
ꢀꢁRR ꢂꢃꢄꢅꢄ ꢆ ꢇꢇꢈꢉ  
19971 TA01a  
ꢀꢁꢁꢂꢀ ꢃꢄ0ꢀꢅ  
–15V  
Rev 0  
1
Document Feedback  
For more information www.analog.com  
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