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ADA4051-2_VB

更新时间： 2024-11-23 08:18:23
品牌 Logo 应用领域
亚德诺 - ADI 监视器
页数 文件大小 规格书
5页 135K
描述
Low Cost, Level Shifted Low Side Current Monitor for Negative High Voltage Rails

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ADA4051-2_VB 数据手册

 浏览型号ADA4051-2_VB的Datasheet PDF文件第2页浏览型号ADA4051-2_VB的Datasheet PDF文件第3页浏览型号ADA4051-2_VB的Datasheet PDF文件第4页浏览型号ADA4051-2_VB的Datasheet PDF文件第5页 
Circuit Note  
CN-0188  
Devices Connected/Referenced  
Micropower, Zero-Drift, Rail-to-Rail Input  
and Output, Dual Op Amp  
ADA4051-2  
AD7171  
Circuits from the Lab™ reference circuits are engineered and  
tested for quick and easy system integration to help solve today’s  
analog, mixed-signal, and RF design challenges. For more  
information and/or support, visit www.analog.com/CN0188.  
Low Power, 16-Bit, Sigma-Delta ADC  
2.5 V, Low Noise, High Accuracy, Band  
Gap Voltage Reference  
ADR381  
Quad-Channel Isolator with  
Integrated DC-to-DC Converter  
ADuM5402  
Low Cost, Level Shifted Low Side Current Monitor for Negative High Voltage Rails  
EVALUATION AND DESIGN SUPPORT  
CIRCUIT FUNCTION AND BENEFITS  
Circuit Evaluation Boards  
The circuit shown in Figure 1 monitors current in individual  
channels of −48 V to better than 1% accuracy. The load current  
passes through a shunt resistor, which is external to the circuit.  
The shunt resistor value is chosen so that the shunt voltage is  
approximately 50 mV at maximum load current.  
CN-0188 Circuit Evaluation Board (EVAL-CN0188-SDPZ)  
System Demonstration Platform (EVAL-SDP-CB1Z)  
Design and Integration Files  
Schematics, Layout Files, Bill of Materials  
+3.3V  
+3.3V  
ISO  
0.1µF  
VIN  
+2.5V  
V
V
DD1  
ISO  
10µF  
VOUT  
ADR381  
GND  
ADuM5402  
REFIN(+)  
VDD  
R7  
4.99k  
SCLK  
V
V
AIN+  
OA  
OB  
IC  
IA  
IB  
R1  
24.9k  
AD7171  
PDRST  
DOUT  
V
V
V
1%  
AIN  
GND  
V
GND  
REFIN(–)  
ISO  
OC  
GND  
GND  
1
ISO  
U1:  
ADA4051-2  
GND  
ISO  
R6  
1k  
D2  
GND  
GND  
1
ISO  
U1A  
U1B  
Q1  
NOTE: OPTIONAL ADuM5402 PROVIDES  
GALVANIC ISOLATION FOR DIGITAL SIGNALS  
AND ISOLATED POWER FOR CIRCUIT  
0.1µF  
R3  
48.7k , 1%  
D1  
5.6V  
D1: MMSZ5232B-7-F  
D2: MBRA120ET3  
Q1: ZXMN7A11GTA, 70V N-CH MOSFET  
R2  
1k  
1%  
R4  
1k  
R5  
4.99k  
1%  
1%  
R
SHUNT  
48V  
–
+
V
SHUNT  
SOURCE  
LOAD  
I
LOAD  
+
GND  
ISO  
Figure 1. Low Side Current Monitor for Negative High Voltage Rails (All Connections and Decoupling Not Shown)  
Rev. B  
Circuits from the Lab™ circuits from Analog Devices have been designed and built by Analog Devices  
engineers. Standard engineering practices have been employed in the design and construction of  
each circuit, andtheir function and performance have been tested and verifiedin a lab environment at  
room temperature. However, you are solely responsible for testing the circuit and determining its  
suitability and applicability for your use and application. Accordingly, in noevent shall Analog Devices  
be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause  
whatsoeverconnectedtotheuse ofanyCircuitsfromtheLabcircuits. (Continuedon last page)  
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  
©2011 Analog Devices, Inc. All rights reserved.  
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