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AD8217

更新时间: 2024-09-16 11:49:03
品牌 Logo 应用领域
亚德诺 - ADI 监控
页数 文件大小 规格书
16页 304K
描述
High Resolution, Zero-Drift Current Shunt Monitor

AD8217 数据手册

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High Resolution, Zero-Drift  
Current Shunt Monitor  
AD8217  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
R4  
High common-mode voltage range  
4.5 V to 80 V operating  
AD8217  
R1  
0 V to 85 V survival  
–IN  
Buffered output voltage  
OUT  
+IN  
Wide operating temperature range: −40°C to +125°C  
Excellent ac and dc performance  
100 nV/°C typical offset drift  
100 µV/°C typical offset  
R2  
R3  
LDO  
GND  
5 ppm/°C typical gain drift  
100 dB typical CMRR at dc  
Figure 1.  
APPLICATIONS  
High side current sensing  
48 V telecom  
Power management  
Base stations  
Unidirectional motor control  
Precision high voltage current sources  
GENERAL DESCRIPTION  
The AD8217 is a high voltage, high-resolution current shunt  
amplifier. It features a set gain of 20 V/V, with a maximum  
0.ꢀ35 gain error over the entire temperature range. The  
buffered output voltage directly interfaces with any typical  
converter. The AD8217 offers excellent common-mode rejection  
from 4.3 V to 80 V, and includes an internal LDO, which directly  
powers the device from the high voltage rail. Therefore, no addi-  
tional supply is necessary, provided that the input common-mode  
range is 4.3 V to 80 V. The AD8217 performs unidirectional  
current measurements across a shunt resistor in a variety of  
industrial and telecom applications including motor control,  
battery management, and base station power amplifier bias  
control.  
The AD8217 offers breakthrough performance throughout the  
−40°C to +123°C temperature range. It features a zero-drift  
core, which leads to a typical offset drift of 100 nV/°C  
throughout the operating temperature and common-mode  
voltage range. Special attention is devoted to output linearity  
being maintained throughout the input differential voltage range  
of 0 mV to 230 mV, regardless of the common-mode voltage  
present, and the typical input offset voltage is 100 μV.  
The AD8217 is offered in a 8-lead MSOP package and is  
specified from −40°C to +123°C.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2010 Analog Devices, Inc. All rights reserved.  
 
 
 

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