Product Brief TLE4951C(B) Highly robust differential Hall sensor with visible adaptive hysteresis and outstanding vibration suppression for automotive powertrain and industrial applications Features The TLE4951 detects the motion of ferromagnetic structures or objects by measuring the change of differential flux density . This changes are either generated by a moving High sensitivity magnetic encoder or a moving ferromagnetic gear structure (e.g. Gear wheel) within a Adaptive thresholds magnetic back bias field. The high sensitivity and very precise switching behavior ensure Visible hysteresis excellent measurement accuracy over the whole frequency range of up to 12kHz. Like Excellent vibration suppression many other Infineon powertrain speed sensors, the TLE4951 offers a fast power up and Large operating air gap self-calibration phase combined with a frequent recalibration function in run mode Fast start up using an visible adaptive hysteresis concept. In addition, the TLE4951 provides a new, Advanced performance by outstanding vibration suppression function by using a smart algorithm. This ensures that dynamic self calibration no pulses are missed even under sever conditions like air gap jumps, high rotational principle or air gap vibration.Special care was also taken in the design to provide a precise zero-Hertz measurement capability, which is of high benefit in e.g. new automotive Wide frequency range of 0Hz to 12kHz transmission application with parking brake, hill holder or hill start assist functions. The Digital output signal TLE4951 has a standard 2-wire current interface. It is provides in a module style package Wide operating temperature with an integrated capacitor for high EMC robustness. A version with an integrated back ranges of -40°C ≤ Tj ≤ +175°C bias NdFeB magnet for easy usage and design-in is optionally available. South and north pole Harsh environmental conditions prevalent in automotive or some industrial applications Module style package with an pre-induction possible are the home of TLE4951. As such the TLE4951 is best suited for automotive transmission applications, speedometer applications or industrial speed sensing integrated capacitor of 1.8nF Optional: Package with integrated Back Bias magnet applications. (iBB) Gear wheel application with back bias magnet and magnetic encoder wheel application Magnet Wheel Gear Wheel Hall Sensor 1 Signal Processing Circuitry S (N) Hall Sensor 2 Hall Sensor 1 Permanent Magnet Signal Processing Circuitry Hall Sensor 2 N (S) Back Bias Magnet www.infineon.com/magnetic-sensors Encoder Wheels Product Brief TLE4951C(B) Highly robust differential Hall sensor with visible adaptive hysteresis and outstanding vibration suppression for automotive powertrain and industrial applications Block Diagram Supply Voltage Generation Bandgap Supply Comparator Oscillator Offset DAC B2 2 (right) Offset Calculation Amplifier Speed Path VDD ∆B speed g s1 B3 LPF 3 (center) speed signal : ∆B speed =B 2–B 1 Tracking ADC Algorithm Output Protocol GND B1 multiplexed ADC 1 (left) Pre -Amplifier with dB dir calculation dir calc ∆B dir Adaptive Hysteresis Comparator gd LPF ESD Vibration Detection direction signal: ∆B dir =B 3–(B 2+B 1 )/2 Back-bias Field Orientation Current Modulator Product Table Sales Name TLE4951C Description Order Code TLE4951 in standard PG‑SSO‑2‑53 SP000848256 package S TLE4951CB TLE4951 with integrated back bias SP000913560 magnet in PG-SSOM-2-11 package N VS GND Published by Infineon Technologies AG 85579 Neubiberg, Germany © 2013 Infineon Technologies AG. All Rights Reserved. Visit us: www.infineon.com Order Number: B142-H9811-X-X-7600 Date: 07 / 2013 Attention please! The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”). With respect to any examples or hints given herein, any typical values stated herein and/ or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). 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.