TLE4941HALA1

TLE4941HALA1 Datasheet

TLE4941 TLE4941C

Part	Datasheet
TLE4941HALA1	TLE4941HALA1 (pdf)

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TLE49411HALA1	TLE49411HALA1
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TLE4941CBAMA1	TLE4941CBAMA1

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Data Sheet, V2.1, February 2005 Differential Two-Wire Hall Effect Sensor-IC for Wheel Speed Applications TLE4941 TLE4941C Sensors Never stop thinking. Edition 2004-03-19 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 München, Germany Infineon Technologies AG All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. TLE4941 Series Differential Two-Wire Hall Effect Sensor IC TLE4941 TLE4941C • Two-wire current interface • Dynamic self-calibration principle • Single chip solution • No external components needed • High sensitivity • South and north pole pre-induction possible • High resistance to piezo effects • Large operating air-gaps • Wide operating temperature range • TLE4941C nF overmolded capacitor PG-SSO-2-1 PG-SSO-2-2 Type TLE4941 TLE4941C Marking 4100R 41C0R Ordering Code Q62705-K714 Q62705-K715 Package PG-SSO-2-1 PG-SSO-2-2 The Hall Effect sensor IC TLE4941 is designed to provide information about rotational speed to modern vehicle dynamics control systems and ABS. The output has been designed as a two wire current interface. The sensor operates without external components and combines a fast power-up time with a low cut-off frequency. Excellent accuracy and sensitivity is specified for harsh automotive requirements as a wide temperature range, high ESD and EMC robustness. State-of-the art BiCMOS technology is used for monolithic integration of the active sensor areas and the signal conditioning circuitry. Finally, the optimized piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets. The TLE4941C is additionally provided with an overmolded nF capacitor for improved EMI performance. Data Sheet V2.1, 2005-02 Pin Configuration view on branded side of component TLE4941 TLE4941C S 0015 4100R Data Code Marking Center of sensitive area Figure 1 VCC GND VCC GND AEP03200 "VCC" Hall Probes Power Supply Regulator Main Comp Oscillator syst clock Offset DAC Speed ADC Gain Range "GND" Digital Circuit Figure 2 Block Diagram Data Sheet AEB03201 V2.1, 2005-02 TLE4941 TLE4941C Functional Description The differential hall sensor IC detects the motion of ferromagnetic and permanent magnet structures by measuring the differential flux density of the magnetic field. To detect the motion of ferromagnetic objects the magnetic field must be provided by a back biasing permanent magnet. Either south or north pole of the magnet can be attached to the rear unmarked side of the IC package. Magnetic offsets of up to ± 20 mT and device offsets are cancelled by a self-calibration algorithm. Only a few transitions are necessary for self-calibration. After the initial calibration sequence switching occurs when the input signal is crossing the arithmetic mean of its max. and min. value e.g. zero-crossing for sinusoidal signals . The ON and OFF state of the IC are indicated by High and Low current consumption. Circuit Description The circuit is supplied internally by a 3 V voltage regulator. An on-chip oscillator serves as clock generator for the digital part of the circuit. TLE4941 signal path is comprised of a pair of hall probes, spaced at mm, a differential amplifier including a noise-limiting low-pass filter and a comparator feeding a switched current output stage. In addition an offset cancellation feedback loop is provided by a signal-tracking A/D converter, a digital signal processor DSP and an offset cancellation D/A converter. During the startup phase un-calibrated mode the output is disabled I = ILOW . The differential input signal is digitized in the speed A/D converter and fed into the DSP. The minimum and maximum values of the input signal are extracted and their corresponding arithmetic mean value is calculated. The offset of this mean value is determined and fed into the offset cancellation DAC. After successful correction of the offset, the output switching is enabled.

PDF Datasheet Preview

Data Sheet, V2.1, February 2005

Differential Two-Wire Hall Effect Sensor-IC for Wheel Speed Applications

TLE4941 TLE4941C

Sensors

Never stop thinking.

Edition 2004-03-19

Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 München, Germany

Infineon Technologies AG

All Rights Reserved.

Attention please!

The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein.

Information

For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office

Warnings

Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

TLE4941 Series

Differential Two-Wire Hall Effect Sensor IC

TLE4941 TLE4941C
• Two-wire current interface
• Dynamic self-calibration principle
• Single chip solution
• No external components needed
• High sensitivity
• South and north pole pre-induction possible
• High resistance to piezo effects
• Large operating air-gaps
• Wide operating temperature range
• TLE4941C nF overmolded capacitor

PG-SSO-2-1

PG-SSO-2-2

Type TLE4941 TLE4941C

Marking 4100R 41C0R
Ordering Code Q62705-K714 Q62705-K715

Package PG-SSO-2-1 PG-SSO-2-2

The Hall Effect sensor IC TLE4941 is designed to provide information about rotational speed to modern vehicle dynamics control systems and ABS. The output has been designed as a two wire current interface. The sensor operates without external components and combines a fast power-up time with a low cut-off frequency. Excellent accuracy and sensitivity is specified for harsh automotive requirements as a wide temperature range, high ESD and EMC robustness. State-of-the art BiCMOS technology is used for monolithic integration of the active sensor areas and the signal conditioning circuitry.

Finally, the optimized piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets.

The TLE4941C is additionally provided with an overmolded nF capacitor for improved EMI performance.

Data Sheet

V2.1, 2005-02

Pin Configuration view on branded side of component

TLE4941 TLE4941C

S 0015
4100R

Data Code Marking

Center of sensitive area

Figure 1

VCC GND

VCC GND

AEP03200
"VCC"

Hall Probes

Power Supply Regulator

Main Comp

Oscillator syst clock

Offset DAC

Speed ADC

Gain Range
"GND"

Digital Circuit

Figure 2 Block Diagram

Data Sheet

AEB03201

V2.1, 2005-02

TLE4941 TLE4941C

Functional Description

The differential hall sensor IC detects the motion of ferromagnetic and permanent magnet structures by measuring the differential flux density of the magnetic field. To detect the motion of ferromagnetic objects the magnetic field must be provided by a back biasing permanent magnet. Either south or north pole of the magnet can be attached to the rear unmarked side of the IC package.

Magnetic offsets of up to ± 20 mT and device offsets are cancelled by a self-calibration algorithm. Only a few transitions are necessary for self-calibration. After the initial calibration sequence switching occurs when the input signal is crossing the arithmetic mean of its max. and min. value e.g. zero-crossing for sinusoidal signals . The ON and OFF state of the IC are indicated by High and Low current consumption.

Circuit Description

The circuit is supplied internally by a 3 V voltage regulator. An on-chip oscillator serves as clock generator for the digital part of the circuit.

TLE4941 signal path is comprised of a pair of hall probes, spaced at mm, a differential amplifier including a noise-limiting low-pass filter and a comparator feeding a switched current output stage. In addition an offset cancellation feedback loop is provided by a signal-tracking A/D converter, a digital signal processor DSP and an offset cancellation D/A converter.

During the startup phase un-calibrated mode the output is disabled I = ILOW .

The differential input signal is digitized in the speed A/D converter and fed into the DSP. The minimum and maximum values of the input signal are extracted and their corresponding arithmetic mean value is calculated. The offset of this mean value is determined and fed into the offset cancellation DAC.

After successful correction of the offset, the output switching is enabled.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived TLE4941HALA1 Datasheet file may be downloaded here without warranties.

Datasheet ID: TLE4941HALA1 638764