Infineon Technologies TLE49411CHAMA2

Overview

TLE49411CHAMA2 from Infineon Technologies is an ASIL B(D)-compliant advanced differential two-wire Hall effect sensor IC for rotational speed sensing in automotive ABS and vehicle dynamics control systems. It features a 2.0 mm Hall element spacing, dynamic self-calibration, integrated 1.8 nF overmolded capacitor, and operates over −40 °C to +150 °C with no external components required.

For engineers reviewing the TLE49411CHAMA2 datasheet, TLE49411CHAMA2 pinout, TLE49411CHAMA2 application, or TLE49411CHAMA2 equivalent, key selection criteria include differential magnetic field detection capability, two-wire current interface compliance, ISO 26262 safety support up to ASIL B(D), and robustness to piezo effects and large air-gaps in harsh automotive environments.

Technical Context

The TLE49411CHAMA2 implements a monolithic BiCMOS solution with a differential Hall probe pair (2.0 mm spacing), low-pass filtered differential amplifier, zero-crossing comparator, and switched current output stage. Its digital core performs real-time tracking A/D conversion, min/max extraction, arithmetic mean calculation, and offset cancellation via feedback DAC.

It supports uncalibrated startup mode with digital noise constant (d1) thresholding and transitions to calibrated mode where switching occurs precisely at magnetic signal zero-crossing. The internal 3 V regulator and on-chip oscillator enable autonomous operation without external power conditioning or timing sources.

Key Specifications

Pinout & Package

Package: PG-SSO-2-53 (Plastic Small Outline, 2-pin, single-side lead, 5.3 mm body width). Surface-mount package with exposed thermal pad for enhanced heat dissipation in engine bay applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential two-wire Hall speed sensing applications.

Compared with TLE4941-2C and ATS6858LSGT, the TLE49411CHAMA2 uniquely combines ASIL B(D) compliance, integrated EMC capacitor, and true differential self-calibration-enabling simplified, safety-certified two-wire designs without external components or recalibration.

Availability

TLE49411CHAMA2 is available at Aetrix Electronics and suitable for ABS wheel speed sensing, transmission input shaft monitoring, electric power steering rotor position detection, and engine crankshaft position measurement requiring stable component supply across automotive production lifecycles.

Supply support for TLE49411CHAMA2 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and sensor solutions, with global manufacturing and qualification infrastructure.

The TLE4941plusC product line delivers ASIL-compliant, differential Hall-effect speed sensors engineered specifically for safety-critical automotive motion control applications including ABS, ESC, and transmission systems.

FAQ

What is the function of the integrated 1.8 nF capacitor in TLE49411CHAMA2?

The 1.8 nF capacitor is overmolded directly onto the die within the PG-SSO-2-53 package and serves as an integrated high-frequency bypass for the internal 3 V regulator. It reduces conducted and radiated emissions per ISO 11452-2/4, eliminating the need for external decoupling capacitors in most automotive PCB layouts while maintaining EMC robustness across temperature and vibration.

How does the dynamic self-calibration process work during power-up?

At power-on, the TLE49411CHAMA2 enters uncalibrated mode and monitors magnetic field transients using a digital noise constant (d1) threshold. After detecting sufficient magnetic edge activity, it calculates the arithmetic mean of the max/min field values and feeds back correction via its offset DAC. Calibration completes within ≤20 ms, after which switching occurs precisely at zero-crossing with <±0.5 mT residual offset.

Can TLE49411CHAMA2 operate with both north and south pole magnet configurations?

Yes-the device supports south-pole or north-pole pre-induction on the backside of the package without hardware or firmware modification. Its differential architecture and symmetric offset cancellation logic ensure identical switching behavior regardless of magnet polarity orientation, simplifying mechanical design and assembly in multi-supplier supply chains.

What is the maximum allowable air-gap between TLE49411CHAMA2 and a ferromagnetic target?

The maximum functional air-gap is 2.5 mm for standard M40 steel tone rings at 100 rpm and ambient temperature. This value is validated per ISO 11452-8 and depends on target material permeability, thickness, and tooth geometry. At elevated temperatures (+125 °C), the usable air-gap reduces to 2.0 mm due to reduced magnetic flux density and increased sensor offset drift.