Product Brief TLE4957C Highly accurate differential Hall sensor with visible adaptive hysteresis and high vibration robustness for automotive powertrain and industrial applications The TLE4957C family detects the motion and position of ferromagnetic structures by measuring the change of differential flux density which results form a moving magnetic encoder wheel or is generated by the interaction of a magnetic back bias field with the ferromagnetic structure of a gear wheel or similar structure. The high sensitivity and self-calibration mode ensure optimal measurement accuracy. The sensor powers up very fast and reaches full calibration within only a few transitions after start-up. The combination of a frequent recalibration function in run mode with its visible or hidden adaptive hysteresis algorithm enables the TLE4957C to accurately switch over a broad range of different gear wheel structures with a high robustness against disturbances, like air-gap jumps or run-out events. TLE4957 has a voltage interface with a PWM output signal, therefore it comes with a 3-wire output, but a 2-wire configuration is possible by using 2 resistors. In order to perfectly meet the requirements of harsh environmental conditions prevalent in automotive applications, the sensor is designed to withstand a wide range of temperatures, is robust against vibration, has a high ESD performance and large EMC resistance. With its features TLE4957C family is the ideal differential Hall sensor for applications like today’s crankshaft or transmission speed sensing in automotive, speedometers or similar industrial applications. TLE4957C is perfectly suited for applications like: Gear Wheel Application with Back Bias Magnet and Magnetic Encoder Wheel Application CW CCW CW CCW S (N) CCW = Counter clock wise CW = Clock wise N (S) VDD GND Q VDD GND Q Back Bias Magnet www.infineon.com/magnetic-sensors Encoder Wheels Features High sensitivity thresholds Visible and hidden hysteresis options Large operating air-gap Advanced performance by dynamic self calibration principle Wide frequency range of 1Hz to 8kHz Digital output signal Wide operating temperature ranges of -40°C ≤ Tj ≤ +175°C Reverse voltage protection at VS-pin Short-circuit and overtemperature protection of output Module style package with two integrated capacitors: –– 4.7nF between Q and GND –– 47nF between VS and GND: Required for micro cuts in power supply and optimal EMC robustness Adaptive Product Brief TLE4957C Highly accurate differential Hall sensor with visible adaptive hysteresis and high vibration robustness for automotive powertrain and industrial applications Block Diagram Q VS Clamping & Reverse Voltage Protection Hyst Comp Overtemperature & Short-circuit Protection Power Supply Regulator Analog Supply N-Channel Open Drain Main Comp Digital Supply Enable Hall Probes + Amplifier - Clamping Interface + Filter - Tracking ADC Digital Min Max Algorithm Offset DAC Actual Switching Level Bias for Temperature & Technology Compensation Oscillator Reset GND Sales Name Description Order Code TLE4957C E6747 TLE4957 hidden adaptive hysteresis in PG-SSO-3-92 package SP000649296 TLE4957C-2 E6747 TLE4957 visible adaptive hysteresis in PG-SSO-3-92 package SP000745374 Published by Infineon Technologies AG 85579 Neubiberg, Germany © 2013 Infineon Technologies AG. All Rights Reserved. Visit us: www.infineon.com Order Number: B142-H9823-X-X-7600 Date: 09 / 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.