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DRV411AIPWPR

更新时间： 2024-11-07 11:07:03
品牌 Logo 应用领域
德州仪器 - TI 传感器
页数 文件大小 规格书
33页 1579K
描述
适用于闭环应用的霍尔效应磁传感器信号调理 IC | PWP | 20 | -40 to 125

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DRV411  
www.ti.com  
SBOS693A –AUGUST 2013–REVISED AUGUST 2013  
Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensors  
Check for Samples: DRV411  
1
FEATURES  
DESCRIPTION  
The DRV411 is designed to condition InSb Hall  
elements for use in closed-loop current-sensor  
modules. The DRV411 provides precision excitation  
circuitry for the Hall-element effectively eliminating  
the offset and offset-drift of the Hall element. This  
device also provides a 250-mA H-bridge for driving  
the sensor compensation coil as well a precision  
differential amplifier to generate the output signal.  
The 250-mA drive capability of the H-bridge roughly  
doubles the current measurement range compared to  
conventional single-ended drive methods.  
23  
•
Optimized for Symmetric Hall-Elements  
(for example, AKM HW-322, HW-302, or similar)  
Spinning Current Hall Sensor Excitation  
•
–
–
Elimination of Hall Sensor Offset and Drift  
Elimination of 1/f Noise  
•
•
Extended Current Measurement Range  
H-Bridge Drive Capability: 250 mA  
Precision Difference Amplifier:  
–
–
Offset and Drift: 100 µV (max), 2 µV/°C  
(max)  
The Hall sensor front-end circuit and the differential  
amplifier employ proprietary offset cancelling  
techniques. These techniques, along with a high-  
accuracy voltage reference, significantly improve the  
accuracy of the overall current-sensor module. The  
output voltage is pin-selectable to support a 2.5-V  
output for use with a 5-V power supply, as well as  
1.65-V for 3.3-V sensors.  
–
System Bandwidth: 200 kHz  
•
Precision Reference:  
–
–
–
Accuracy: 0.2% (max)  
Drift: 50 ppm/°C (max)  
Pin-Selectable for 2.5 V, 1.65 V, and  
Ratiometric Mode  
For optimum heat dissipation, the DRV411 is  
available in thermally enhanced 4-mm × 4-mm QFN  
and TSSOP-20 with PowerPAD packages. The  
DRV411 is specified for operation over the full  
extended industrial temperature range of –40°C to  
+125°C.  
•
•
•
Overrange and Error Flags  
Supply: 2.7 V to 5.5 V  
Packages: 4-mm × 4-mm QFN and TSSOP-20  
PowerPAD™  
•
Temperature Range: –40°C to +125°C  
APPLICATIONS  
•
•
Closed-Loop Current-Sensor Modules  
DC and AC Current Measurement  
BLOCK DIAGRAM  
R
SHUNT  
IAIN1  
VDD ICOMP1  
IAIN2  
DRV411  
Primary Winding  
Sensor  
Excitation  
Magnetic Core  
Differential  
Amplifier  
HALL1  
HALL4  
Demod  
and  
Filtering  
Linear  
H-Bridge  
Driver  
Rotation  
Switches  
Class AB  
Pre-Driver  
VOUT  
REFIN  
Voltage Reference  
2.5V, 1.65V,  
Ratiometric  
Gain, Compensation,  
Excitation Control  
IPRIM  
Overrange  
OR  
REFOUT  
Compensation  
Winding  
GND ICOMP2  
GSEL1 GSEL2  
RSEL1 RSEL2  
ERROR  
1
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.  
2
3
PowerPAD is a trademark of Texas Instruments.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2013, Texas Instruments Incorporated  
1234567...33

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