Infineon
TLI4966G
TLI4966
Package: PG-SSO-3-1
Dual-channel Hall speed and direction sensor in SSO-3 for automotive and industrial rotational measurement with quadrature output.
Overview
The Infineon TLI4966G is a dual-channel Hall-effect speed and direction sensor in the miniature PG-SSO-3-1 package, designed for non-contacting rotational speed measurement and direction detection in automotive transmission sensors, industrial conveyor monitoring, and BLDC motor commutation feedback systems. The device integrates two magnetically biased Hall elements separated by a precisely controlled pitch on a single silicon die, enabling the detection of both rotating speed and direction of rotation from a single passive gear or ring magnet target - eliminating the separate directional encoder track required by single-channel designs. Operating from a 3.3 V or 5 V supply rail with a current consumption of only 4.2 mA, the TLI4966G generates two complementary push-pull digital output channels with edge separation that encodes rotational direction: a leading edge on channel A versus channel B indicates clockwise rotation, while a lagging pattern indicates counterclockwise motion. This signal format is directly compatible with standard MCU quadrature decoder peripherals such as the Infineon XMC4700 POSIF module, enabling hardware-accelerated direction detection without software polling overhead. The sensor operates across a junction temperature range of -40 degreesC to +150 degreesC and withstands external magnetic fields up to 50 mT before operational upset, meeting the stray-field rejection requirements of proximity to electric motor windings and high-current bus bars. AEC-Q100 qualification at Grade 0 confirms suitability for underhood automotive environments. BeiLuo stocks the TLI4966G with application support including reference PCB layouts and C driver code for XMC and AURIX MCU integration.
Specifications
| Parameter | Value | Unit |
|---|---|---|
| Sensor Type | Dual Hall Speed & Direction | |
| Supply Voltage VCC | 3.3 - 5.5 | V |
| Supply Current ICC | 4.2 | mA |
| Output Type | Push-Pull Digital (2 channels) | |
| Air Gap Range | 0.3 - 3.0 | mm |
| Magnetic Stray-Field Rejection | 50 | mT |
| Operating Temperature Range | -40 to +150 | degreesC |
| AEC-Q100 Grade | Grade 0 | |
| Package | PG-SSO-3-1 | |
| Speed Range (typical) | 0 - 20,000 | RPM |
Applications
- Automotive Transmission Speed Sensing
- BLDC Motor Commutation Feedback
- Industrial Conveyor Speed Monitoring
- Electric Power Steering Angle Sensing
- ABS Wheel Speed Detection
Documents & Downloads
- TLI4966G Datasheet (1.3 MB)
- BeiLuo Sensors Selection Guide (0.8 MB)
Frequently Asked Questions
How does the TLI4966G detect rotational direction without a dedicated direction encoder track?
The TLI4966G integrates two Hall elements on a single die with a precisely controlled spatial pitch matched to typical gear-tooth or pole-ring geometries. As a gear tooth passes each element in sequence, the device generates two digital output pulses with a measurable phase difference. When the target rotates clockwise, channel A leads channel B; counterclockwise rotation reverses the lead-lag relationship. A standard MCU quadrature decoder peripheral detects this phase relationship in hardware, enabling direction detection without any software polling or discrete encoder track assembly.
What target geometry is compatible with the TLI4966G?
The TLI4966G is optimized for ferromagnetic gear targets with tooth pitches from 1.5 mm to 5 mm and for alternating-pole magnetic ring targets with pole widths in the same range. The device includes an integrated back-bias magnet, so the target itself can be a passive ferromagnetic wheel rather than a pre-magnetized ring magnet, reducing target manufacturing cost. Air gap between sensor face and target should be maintained in the 0.3 to 3.0 mm range for reliable switching at the specified sensitivity threshold.
Is the TLI4966G suitable for use adjacent to a high-current motor bus bar?
Yes. The TLI4966G incorporates a differential Hall cell architecture that rejects spatially uniform stray fields up to 50 mT without generating false output pulses. At a 100 A motor phase current in a 150 mm conductor spacing from the sensor, the stray field is typically well below 10 mT at the sensor location, providing substantial margin. The device's Chopper-Stabilized Hall circuitry also compensates for offset drift due to mechanical stress and temperature, maintaining reliable output across the full automotive temperature range.
Can TLI4966G output signals be read directly by an Infineon XMC4700 MCU?
Yes. The TLI4966G push-pull digital outputs are directly compatible with the XMC4700 POSIF (Position Interface) module, which hardware-decodes quadrature encoded speed and direction without CPU intervention. Connect TLI4966G channel A to POSIF POSI0A and channel B to POSIF POSI0B, configure the POSIF in quadrature decoder mode, and the XMC4700 automatically counts encoder pulses and updates the position register on every edge. BeiLuo provides a complete DAVE APP configuration and C driver for this interface on request.
Does BeiLuo provide TLI4966G samples and what is the evaluation process?
BeiLuo maintains evaluation samples of the TLI4966G for qualified design-win engagements. Our FAE team ships samples along with a reference PCB layout in KiCad format and embedded C driver code targeting the XMC4700 and AURIX TC264DA platforms. The driver includes initialization sequences, interrupt-driven pulse counting, and a direction detection algorithm compatible with FreeRTOS. Sample requests can be submitted through our website contact form, and our FAE team typically responds within one business day.
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