Infineon Technologies TLE49411HALA1

Overview

TLE49411HALA1 from Infineon Technologies is a differential two-wire Hall effect sensor IC designed for wheel speed sensing in automotive ABS and vehicle dynamics control systems. It features a 2.5 mm probe spacing, ±120 mT differential induction range, ±20 mT static offset compensation, and operates from 4.5 V to 20 V supply across –40°C to +150°C. Its two-wire current interface delivers 5.9–8.4 mA (low) / 11.8–16.8 mA (high) output states with <±3% jitter at 2500–10,000 Hz.

For engineers reviewing the TLE49411HALA1 datasheet, TLE49411HALA1 pinout, TLE49411HALA1 application, or TLE49411HALA1 equivalent, key selection criteria include differential flux detection capability, self-calibrating zero-crossing switching, ESD robustness (±12 kV HBM), wide air-gap tolerance, and compatibility with ferromagnetic target wheels under harsh thermal and EMC conditions.

Technical Context

The TLE49411HALA1 implements a monolithic BiCMOS solution integrating dual Hall probes, a low-pass filtered differential amplifier, a DSP-based dynamic offset cancellation loop, and a switched-current output stage. Its self-calibration algorithm extracts min/max signal values during startup to compute arithmetic mean offset, enabling reliable zero-crossing detection without external components.

It uses an internal 3 V regulator and on-chip oscillator for digital timing, with propagation delay dominated by the noise-limiting filter. Switching is disabled until calibration completes (≤300 µs after ≥3 magnetic edges), and parasitic switching is suppressed below ∆BLimit = 0.35–1.7 mT depending on frequency band.

Key Specifications

Pinout & Package

Package: PG-SSO-2-1 - surface-mount, 2-pin, pure-tin-plated leadframe (Wieland K62), RoHS-compliant, optimized for automotive under-hood thermal cycling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential wheel speed sensing applications.

Compared with TLE4941C and ATS6858LSGT, TLE49411HALA1 offers lowest system-level BOM count (no external caps or resistors), fastest startup (<300 µs calibration), and highest temperature rating (150°C continuous), making it optimal for cost-sensitive, thermally demanding ABS modules.

Availability

TLE49411HALA1 is available at Aetrix Electronics and suitable for ABS wheel speed sensing, electronic stability control, traction control systems, and automatic transmission input speed monitoring requiring stable component supply across automotive production lifecycles.

Supply support for TLE49411HALA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global R&D and manufacturing infrastructure.

The TLE4941 series belongs to Infineon's automotive Hall sensor product line, engineered specifically for contactless rotational speed measurement in safety-critical chassis control systems under extended temperature and EMC stress.

FAQ

What is the minimum number of magnetic transitions required for initial calibration?

The TLE49411HALA1 requires exactly three magnetic edges to complete its dynamic self-calibration sequence. After the third edge, the arithmetic mean of the input signal's min/max values is computed and applied as offset correction. Output switching is enabled within 300 µs of the third edge, and full accuracy is achieved by the seventh edge, which refines the offset estimate.

Can TLE49411HALA1 operate with a back-biasing magnet on either pole face?

Yes - the TLE49411HALA1 supports pre-induction with either the south or north pole of a permanent magnet attached to the unmarked rear side of the package. This bidirectional capability simplifies mechanical assembly and accommodates varying magnet orientation conventions across OEM platforms without redesigning the sensor mount.

How does the device handle vibration-induced piezoelectric signals?

The TLE49411HALA1 integrates mechanical layout optimization and active piezo compensation circuitry to suppress false triggering from vibration. Its differential Hall probe pair (2.5 mm spacing) inherently rejects common-mode stress-induced voltages, while the DSP-based offset tracking loop continuously adapts to slow-drift piezo effects, maintaining stable zero-crossing detection even on resonant suspension components.

Is external filtering required for EMI immunity in 12 V automotive systems?

No external filtering is required. The TLE49411HALA1's internal noise-limiting low-pass filter, combined with ±12 kV HBM ESD protection and differential architecture, provides sufficient immunity against typical automotive conducted and radiated noise. It meets ISO 11452-4 (BCI) and ISO 11452-2 (radiated immunity) requirements when installed per Infineon's recommended PCB layout guidelines.