Smallest form factor Hall Sensor on the Market from Micronas HAC830 and HAL83x

The new HAL83x family from Micronas consists of powerful multi-purpose Hall sensors for linear displacement and angle detection below 90°. They offer flexibility thanks to the analog and PWM output as well as to the programmable low-pass filter. Due to the high temperature stability, the sensors can be applied in harsh environments and their ability to detect low magnetic fields leads to reduced system costs.

Major characteristics such as 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 choppered offset compensation, an A/D converter, digital signal processing, a D/A converter with output driver, an EEPROM 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 easily be calibrated for perfectly adjusting its output to the input signals and to compensate for any variations in the application (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 can easily be done with a PC and the application kit from TDK-Micronas.

The sensor is designed for hostile industrial and automotive applications (TJ =−40 °C up to 170 °C). The HAL 83x family is available in the very small leaded RoHs package TO92-UT and is AECQ100 qualified.

HAL 83x Family Overview
HAL 830 Analog output, 30 mT to 100 mT range
HAC 830 Analog output, 30 mT to 100 mT range, integrated caps
HAL 835 Analog and PWM output, 15 mT to 150 mT range, additional features

Some of the key features include:

• High-precision linear Hall-effect sensor with 12-bit analog output
• Offset drift over temperature less than ±0.2% of VSUP (±0.1% for HAL 835)
• Programmable temperature compensation for sensitivity
• Open-circuit (ground and supply line break) detection with 5 kO pull-up and pull-down resistor, overvoltage and undervoltage detection
• Programmable clamping function
• Programming and operation of multiple sensors at the same supply line
• High immunity against ESD
• Operates from -40 °C up to 170 °C junction temperature
• Overvoltage and reverse-voltage protection at all pins, short-circuit protected push-pull output
• Magnetic field measurement range from 15 mT up to ±150 mT (HAL 835)
• Flexible analog or PWM output (HAL 835)
• Programmable low-pass filter at 80 Hz (less noise) or 2 kHz (faster response) (HAL 835)
• Backbias cancellation feature enables the measurement of small AC magnetic fields when superposed with large DC fields (HAL 835)

Major Applications:

Block diagram – system architecture

The HAC 830

• HAC830 has the smallest form factor
• One of the highest ESD ratings (No risk of ESD discharge in between 2 molds parts)

Key Take Away

• HAC830M is based on the proven technology from HAL8xy family with very good temperature stability (offset, sensitivity)
• HAC830M is a robust device against BCI in the smallest form factor available on the market