Infineon Technologies TLE4925CHAMA2

Overview

TLE4925CHAMA2 from Infineon Technologies is a dynamic differential Hall effect sensor IC designed for precise motion and position sensing of ferromagnetic or permanent magnet targets. It features symmetrical switching thresholds, integrated 4.7nF capacitors (PG-SSO-3-9 package), open-drain digital output, self-calibrating zero-crossing detection in running mode, and operates from 3 V to 24 V supply across –40 °C to +155 °C junction temperature - used in automotive crankshaft and camshaft position sensing.

For engineers reviewing the TLE4925CHAMA2 datasheet, TLE4925CHAMA2 pinout, TLE4925CHAMA2 application, or TLE4925CHAMA2 equivalent, key selection considerations include its differential Hall architecture, built-in offset cancellation DSP, startup-to-running mode transition timing (≤780 ms), integrated capacitors enabling simplified PCB layout, and robust protection features including reverse-voltage, short-circuit, and overtemperature output safeguards.

Technical Context

The TLE4925CHAMA2 implements a dual-Hall plate architecture with 2.5 mm spacing to measure differential magnetic flux (ΔB), feeding into a noise-shaping filter and advanced digital signal processor that performs real-time offset cancellation via DAC feedback. Its self-calibration loop computes arithmetic mean of signal peaks during startup to establish baseline offset before entering high-accuracy running mode.

In running mode, switching occurs precisely at zero-crossing of the compensated differential signal, with propagation delay dominated by the noise-shaping filter (typ. 12.5–256 µs). The IC supports both two-wire and three-wire configurations, includes clamping diodes on VS and Q pins (24–27.5 V), and uses an internal oscillator (1.08–1.68 MHz) to drive sampling and calibration logic.

Key Specifications

Pinout & Package

Package: PG-SSO-3-9 - surface-mount, module-style package with integrated 4.7 nF X7R ceramic capacitors (±10%, 100 V rating) mounted internally across VS–GND and Q–GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential Hall position sensing applications.

Compared with TLE4924C and TLV4922-2K, the TLE4925CHAMA2 delivers superior long-term stability in high-temperature, high-vibration environments due to its differential architecture, embedded capacitors, and active self-calibration-making it the preferred choice for engine timing-critical applications where zero-crossing fidelity is non-negotiable.

Availability

TLE4925CHAMA2 is available at Aetrix Electronics and suitable for automotive crankshaft position sensing, camshaft phase detection, transmission speed monitoring, and ABS wheel speed applications requiring stable component supply across extended temperature and lifetime profiles.

Supply support for TLE4925CHAMA2 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 to AEC-Q100 standards.

The TLE4925CHAMA2 belongs to Infineon's TLE49xx family of high-reliability Hall-effect sensors engineered specifically for engine and transmission position sensing in automotive powertrain systems.

FAQ

What is the difference between TLE4925C and TLE4925?

The TLE4925C (e.g., TLE4925CHAMA2) uses the PG-SSO-3-9 package with two 4.7 nF X7R ceramic capacitors integrated internally across VS–GND and Q–GND. The standard TLE4925 uses PG-SSO-3-6 and requires external capacitors. This integration reduces PCB area, improves EMI immunity, and simplifies layout for automotive applications.

Does TLE4925CHAMA2 require an external pull-up resistor?

Yes - the Q pin is an open-drain N-channel output and must be pulled up externally (typically 4.7 kΩ to VS). No internal pull-up is present. The integrated 4.7 nF capacitor connects Q to GND, so the pull-up must be placed between Q and VS to avoid AC coupling issues.

How does the self-calibration process affect system timing?

After power-on or reset, the IC enters startup mode with immediate edge detection but uncalibrated switching. Within 625–970 ms after the last output transition, it locks output and recalibrates offset. During this time, output remains static - critical for safety-critical timing paths requiring deterministic behavior.

Can TLE4925CHAMA2 operate with a 3.3 V supply?

Yes - it functions down to 3 V supply (min spec), drawing 3–8 mA at 3.3 V. However, output voltage swing and magnetic sensitivity are reduced versus 12 V operation; full performance (e.g., max air-gap, jitter specs) is guaranteed only at VS ≥ 5 V per datasheet test conditions.