Datasheet > DRV411

DRV411

更新时间： 2024-11-21 12:53:19

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
Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensors

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DRV411 数据手册

DRV411

www.ti.com

SBOS693A –AUGUST 2013–REVISED AUGUST 2013

Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensors

Check for Samples: DRV411

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.

•

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

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

I_PRIM

Overrange

REFOUT

Compensation

Winding

GND ICOMP2

GSEL1 GSEL2

RSEL1 RSEL2

ERROR

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.

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.

12 3 4 5 6 7...33

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与DRV411相关器件

型号	品牌	获取价格	描述	数据表
DRV411AIPWP	TI	获取价格	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 1
DRV411AIPWPR	TI	获取价格	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 1
DRV411AIRGPR	TI	获取价格	适用于闭环应用的霍尔效应磁传感器信号调理 IC \| RGP \| 20 \| -40 to 1
DRV411AIRGPT	TI	获取价格	适用于闭环应用的霍尔效应磁传感器信号调理 IC \| RGP \| 20 \| -40 to 1
DRV421	TI	获取价格	用于闭环应用的集成式磁通门传感器 IC
DRV421RTJR	TI	获取价格	用于闭环应用的集成式磁通门传感器 IC \| RTJ \| 20 \| -40 to 125
DRV421RTJT	TI	获取价格	用于闭环应用的集成式磁通门传感器 IC \| RTJ \| 20 \| -40 to 125
DRV425	TI	获取价格	用于开环应用的全集成式磁通门磁传感器
DRV425-Q1	TI	获取价格	汽车类全集成型磁通门磁场传感器
DRV425QWRTJRQ1	TI	获取价格	汽车类全集成型磁通门磁场传感器 \| RTJ \| 20 \| -40 to 125

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