TDK-Micronas HAR® 3900 Stray-Field Robust 3D Position Sensor
TDK-Micronas HAR® 3900 Stray-Field Robust 3D Position Sensor is a high-resolution position sensor engineered for highly accurate position measurements. This sensor addresses the need for stray-field robust 2D position sensing (linear and angular) and ISO 26262-compliant development. The HAR 3900 provides full redundancy thanks to two independent dies stacked in a single package, each electrically connected to the pins of one package side. This stacked-die architecture makes sure both dies occupy the same magnetic-field position to generate synchronous measurement signals. Programming is accomplished via the SPI interface, and the HAR 3900 measures 360° angular range, linear movements, and 3D position information. Based on Hall technology, the module measures vertical and horizontal magnetic-field components and suppresses external magnetic stray fields using an array of Hall plates.
TDK-Micronas HAR 3900 Stray-Field Robust 3D Position Sensor is ASIL B ready and can be integrated into automotive safety-related systems up to ASIL D. The module comes in a 16-pin SSOP-16 SMD package.
Features
- 3D position detection supporting transmission of two angles out of BX, BY or BZ
- Temperature-compensated values of BX, BY, and BZ accessible via SPI
- Accurate angular measurement up to 360° and linear position detection
- Compensation of magnetic stray fields (rotary or linear position detection)
- SEooC ASIL B ready according to ISO 26262 to support functional safety applications
- Programming via SPI interface
- Various configurable signal processing parameters include output gain and offset, reference position, temperature-dependent offset, etc.
- Programmable arbitrary output characteristic with 17 variable or 33 fixed setpoints
- Programmable characteristics in non-volatile memory (EEPROM) with redundancy and lock function
- Read access on non-volatile memory after user lock
- On-chip diagnostics of different functional blocks of sensor
- Low-power mode with wake-up by magnetic field/position information change or external wake-up pin
Applications
- Rotary position detection (end-of shaft and off-axis)
- Transmissions
- Wiper position detection
- Linear position detection
- Transmissions
- Real 3D position detection
- Joysticks
- Shifter position
- Steering column switch position
Specifications
- SSOP16 SMD package
- 3V to 5.5V supply voltage
- Up to 5MHz SPI communication
- 16-bit data transmission with CRC and rolling counter
- Up to 16ksps sampling frequency
- ±10mT to ±130mT recommended magnetic-field amplitude range
- -40°C to +170°C junction temperature range (+160°C maximum ambient temperature)
Related Sensors
TDK-Micronas HAC® & HAR® 3930 Stray-Field 3D Position Sensors
PWM or SENT output, measures 360° angular range, linear movements, and 3D position information.
TDK-Micronas HAL 39xy Stray-Field Robust 3D Position Sensors
Range of products that address the requirements for ISO 26262-compliant development.
TDK HAR 3920-2100 Dual-Die Position Sensor
Offers robust stray-field compensation capabilities and ratiometric analog and switch outputs.
Published: 2023-06-20
| Updated: 2025-06-19