Automotive wheel speed sensor Infineon TLE49421CBAMA1 with integrated self calibration and PWM output
Product Overview
The TLE4942-1C is a differential two-wire Hall Effect sensor IC designed for wheel speed applications with direction detection. It provides crucial information on rotational speed, direction of rotation, assembly position, and airgap status to modern vehicle dynamics control systems and ABS. Leveraging a two-wire current interface based on Pulse Width Modulation (PWM), this single-chip solution operates without external components, offering fast power-up and low cut-off frequency. It is engineered for harsh automotive environments, featuring high sensitivity, excellent accuracy, wide operating temperature range, high ESD robustness, and strong EMC resilience. The integrated dynamic self-calibration principle effectively cancels magnetic and mechanical offsets, ensuring reliable performance and simplified manufacturing.
Product Attributes
- Brand: Infineon Technologies
- Series: TLE4942 Series
- Package Type: PG-SSO-2-4
- Lead Plating: Pure tin (green lead plating)
- Leadframe Material: Wieland K62 (UNS: C18090) containing CuSn1CrNiTi
- Compliance: ROHS compliant
- Additional Features: May contain a data matrix code on the rear side of the package.
Technical Specifications
| Parameter | Symbol | Limit Values | Unit | Remarks |
|---|---|---|---|---|
| Model | TLE4942-1C | 42C1R4 | Type Marking | |
| Package Outline | PG-SSO-2-4 | |||
| Supply Voltage | VCC | 4.5 to 20 | V | Directly on IC leads includes not the RM voltage drop |
| Junction Temperature | Tj | -40 to 150 | C | |
| Differential Magnetic Flux Density | B | -120 to +120 | mT | |
| Supply Current (Low) | ILOW | 5.9 to 8.4 | mA | |
| Supply Current (High) | IHIGH | 11.8 to 16.8 | mA | |
| Output Rise/Fall Slew Rate | tr, tf | 8 to 26 | mA/s | RM = 75 |
| Limit Threshold | BLimit | 0.35 to 1.6 | mT | 1 Hz < f < 5000 Hz |
| Airgap Warning Threshold | BWarning | 0.9 to 2.8 | mT | 1 Hz < f < 5000 Hz |
| Assembly Position Threshold | BEL | 5.2 to 9.6 | mT | At room temp |
| Initial Calibration Delay Time | td,input | 255 to 345 | s | Additional to nstart |
| Pre-low Length | tpre-low | 38 to 52 | s | |
| Length of Warning Pulse | tWarning | 38 to 52 | s | |
| Length of DR-L Pulse | tDR-L | 76 to 104 | s | |
| Length of DR-R Pulse | tDR-R | 153 to 207 | s | |
| Length of DR-L & EL Pulse | tDR-L&EL | 306 to 414 | s | |
| Length of DR-R & EL Pulse | tDR-R&EL | 616 to 828 | s | |
| Stand Still Pulse Length | tStop | 1.232 to 1.656 | ms | |
| Stand Still Period | TStop | 590 to 848 | ms | |
| ESD Protection (HBM) | VESD | 12 | kV | R = 1.5 k, C = 100 pF |
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