Micronas – HAR 24xy High-Precision Dual-Die Linear Hall-Effect Sensors in Ultra-Thin SMD Package
HAR 24xy is a dual-die programmable linear Hall-effect sensor family available in the TSSOP14 package with a package height of less than 1 mm. Each sensor pro-vides true redundancy as it consists of two independent dies stacked in a single pack-age. The stacked-die architecturee ensures that both dies occupy the same magnetic field position, thus generating synchronous measurement outputs.
The HAR 24xy contains two HAL 24xy Hall-effect sensor dies with ratiometric analog or PWM output. For each individual die, major characteristics like magnetic field range, sensitivity, output quiescent voltage (output voltage at B = 0 mT), and output voltage range are programmable in a non-volatile memory.
The HAR 24xy offers 16 setpoints to change the output characteristics from linear to arbi-trary or vice versa. It features a temperature-compensated Hall plate with spinning current offset compensation, an A/D converter, digi-tal signal processing, a D/A converter with output driver (HAR 2425), a PWM output module (HAR 2455), an EEPROM with redundancy and lock function for calibration data, a serial interface for programming the EEPROM, and protection devices at all pins.
Due to internal digital signal processing, the impact of analog offsets, temperature shifts, and mechanical stress is minimized.
Temperature compensation can be fit to all common magnetic materials by program-ming first- and second-order temperature coefficients of the sensor sensitivity. Offset drift over temperature generated by the cus-tomer application can be compensated as well. This enables operation over the full temperature range with high accuracy.
The HAR 2425 provides redundant output voltages proportional to the magnetic flux through the Hall plates and proportional to the supply voltage (ratiometric behavior). The HAR 2455 offers redundant PWM out-puts.
The sensors are designed for hostile industrial and automotive applications and operate with 5 V supply voltage in the junction temperature range from -40 °C up to 170 °C. The HAR 24xy family is available in the ultra-thin TSSOP14-1 package.
Major Applications
- Throttle position, pedal position, steering torque and EGR applications
- Magnetic field and current measurement with appropriate sensitivity programming for each die
Development Tools
- Micronas programmer board (HAL-APB V1.5)
- LabVIEWTM programming software for Windows® including Sub VIs
