Infineon Technologies TLE49411CBAMA1

Overview

TLE49411CBAMA1 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 dynamic self-calibration, 2.5 mm probe spacing, ±120 mT differential induction range, ±500 mT pre-induction capability, and operates from 4.5 V to 20 V supply across –40 °C to +150 °C.

For engineers reviewing the TLE49411CBAMA1 datasheet, TLE49411CBAMA1 pinout, TLE49411CBAMA1 application, or TLE49411CBAMA1 equivalent, key selection criteria include its two-wire current interface (7 mA low / 14 mA high), integrated 1.8 nF overmolded capacitor for EMI suppression, zero-crossing switching behavior, and piezo-compensated architecture enabling robust operation in harsh under-hood environments.

Technical Context

The TLE49411CBAMA1 implements a differential Hall probe pair spaced 2.5 mm apart, feeding a noise-limiting low-pass filter and comparator that drives a switched current output stage. Its digital signal processor performs real-time offset cancellation using minimum/maximum tracking and arithmetic mean calculation during startup.

In calibrated mode, the DSP operates in low-jitter mode with zero-crossing detection; switching is governed by residual comparator offset and propagation delay dominated by the filter. A 3 V internal regulator powers the circuit, and an on-chip oscillator provides system clocking independent of supply ripple.

Key Specifications

Pinout & Package

Package: PG-SSO-2-2 - surface-mount, 2-pin, pure-tin-plated leadframe (RoHS-compliant), optimized for magnetic field coupling through unmarked rear side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4942-2K and ATS6858LSGT, the TLE49411CBAMA1 delivers optimal balance of integration (built-in capacitor), automotive qualification (–40 °C to +150 °C), and two-wire simplicity - making it ideal for cost-sensitive, space-constrained ABS sensor modules where EMI resilience and calibration stability are primary concerns.

Availability

TLE49411CBAMA1 is available at Aetrix Electronics and suitable for ABS wheel speed sensing, electronic stability control, and traction control systems requiring stable component supply across multi-year automotive production cycles.

Supply support for TLE49411CBAMA1 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 electronics, and sensor solutions, with core expertise in BiCMOS process technology and automotive-grade reliability.

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 extreme thermal and electromagnetic conditions.

FAQ

What is the function of the overmolded 1.8 nF capacitor in TLE49411CBAMA1?

The 1.8 nF capacitor is integrated directly into the PG-SSO-2-2 package mold compound to suppress high-frequency electromagnetic interference (EMI) on the supply line. It eliminates the need for external decoupling components, reduces PCB footprint, and improves noise immunity in electrically noisy automotive environments such as wheel hubs and transmission housings.

How does the dynamic self-calibration algorithm work in practice?

The algorithm captures the min/max values of the differential Hall signal during the first 3–6 magnetic transitions after power-up, computes their arithmetic mean, and applies offset correction via an internal DAC. Calibration completes within 300 µs, enabling immediate functional operation without factory trimming or external setup - essential for automated assembly and field replacement.

Can TLE49411CBAMA1 detect both north and south pole magnetic fields?

Yes - the device supports pre-induction with either north or south pole of a permanent magnet attached to the unmarked rear side of the package. This polarity flexibility simplifies mechanical design and magnet orientation during sensor integration into wheel bearing assemblies or transmission housings.

What is the maximum allowable air gap between TLE49411CBAMA1 and the target gear?

Based on its ±120 mT differential induction range and ±500 mT pre-induction capability, the TLE49411CBAMA1 supports air gaps up to 2.5 mm with standard ferromagnetic tone rings. Performance remains stable across temperature and vibration due to piezo compensation and differential probe architecture - verified per ISO 16750-4 for mechanical shock and ISO 11452-2 for radiated immunity.