Sensors

TLE492xC and TLE4957xC - Speed Measurement in Industrial Applications

Block diagram

Sensors in the TLE492xC and TLE4957x families detect the motion and position of ferromagnetic and permanent magnet structures by measuring the differential flux density of a magnetic field. All sensors feature a self-calibration mode for optimum accuracy. After start-up, only a few transitions are required before self-calibration has been completed and a high degree of operational accuracy has been achieved. These sensors thus combine fast power-up with high accuracy and sensitivity.

TLE492xC and TLE4957xC sensors switch at either zero magnetic field crossing or at a viable hysteresis (adaptive or non-adaptive). Customers can also choose different watchdog settings. A broad temperature range, high ESD robustness and large EMC resistance make TLE492xC and TLE4957xC products the perfect fit for harsh automotive environments. A wide range of features and varying hysteresis concepts mean they are also ideal for Hall-based speed sensing in a wide variety of industrial applications. The sensors come in the proven PG-SSO package with three leads and two integrated capacitors.

The TLE4957xC family is derived from the TLE492x family and offers extra immunity against magnetic noise from mechanical vibrations and external magnetic sources.
For further information, visit: www.infineon.com/magnetic-sensors

High sensitivity  Single-chip solution Symmetrical thresholds High resistance to Piezo effects Advanced performance thanks to dynamic self-calibrating principle 1Hz low cut-off frequency Digital output signal Two-wire and three-wire configuration possible Wide operating temperature range Fast start-up times Large operating air gaps Reverse voltage protection at Vs-PIN Short-circuit and overtemperature protection of output No external filter capacitor required 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

Speed sensing (crankshafts for example) Transmission speed Speedometer