The new HAL 24xy family offers extended distance measurement, improved robustness and state-of-the-art diagnostic functions for applications under stringent conditions.
All new family members will leverage upon TDK-Micronas long success in Linear Hall-effect sensors, full in-house manufacturing and automotive proven 0 ppm track record. It uses TDK-Micronas's latest technology node, a new digital architecture as well as further enhanced Hall plates. The sensor provides an improved output linearization by incorporating a flexible compensation function with 16 programmable setpoints. In addition, angles up to 180° can be measured even with a simple magnet configuration.
The major characteristics like magnetic field range, sensitivity, output quiescent voltage and output voltage range are programmable in a non-volatile memory. All sensors feature a temperature-compensated Hall plate with spinning current offset compensation, an A/D converter, digital signal processing, a D/A converter with output driver, an EEPROM memory with redundancy and lock function for the calibration data, a serial interface for programming the EEPROM, and protection devices at all pins.
The sensor can be easily calibrated to adjust perfectly its output to input signals and to compensate for any variations in the applications (magnet positioning, temperature drift). This enables operation over the full temperature range with high accuracy. The calculation of the individual sensor characteristics and the programming of the EEPROM memory can easily be done with a PC and the application kit from TDK-Micronas.
The sensor is designed for hostile industrial and automotive applications. The HAL 24xy family is available in the very small leaded RoHs package TO92UT and is AECQ100 qualified. The SOIC8 package will be available in Q2 2014.
HAL 24xy Family Overview
HAL 2420 2-point calibration
HAL 2425 2-point calibration, 16 setpoints calibration
HAR 24xy Dual-Die Hall sensors with in-package redundancy in TSSOP14 package
Block diagram – system architecture
The HAL 24xy is a monolithic integrated circuit which provides an output voltage proportional to the magnetic flux through the Hall plate and proportional to the supply voltage (ratiometric behavior).This voltage is converted to a digital value, processed in the Digital Signal Processing Unit (DSP) according to the settings of the EEPROM registers, converted back to an analog voltage with ratiometric behavior, and buffered by a push-pull output transistor stage (HAL 242x). The HAL 2455 features a configurable PWM output with up to 12 bit resolution with frequencies between 0.25 kHz and 2 kHz.