Hall

Allegro MicroSystems today announced three ICs: two analogue current sensors and a motor driver for fans. The first current sensor, ACS37630, is designed to be sat on top of a bus bar and partly surrounded by a U-core magnetic field concentrator. “Its vertical Hall technology enables sensing parallel to the package surface, ideal for system integration with U-core magnets,” according ...

Asahi Kasei Microdevices (AKM) is shipping has its new InAs Hall element, the HQ0A11. HQ0A11 features AKM’s smallest and thinnest package size for an InAs-based Hall element, measuring 0.8 x 0.4 x 0.23 mm. It achieves an 85% reduction in volume compared to the previous model of HQ0811 in the high-sensitivity HQ series. It is expected that HQ0A11 will contribute ...

Melexis is aiming at replacing reed switches in automotive door door handles, sun visors, infotainment buttons and brake lights with a micro-power Hall effect switch. “For modern vehicles, accurate switch and latch mechanisms are relied upon by countless systems for feedback,” said the company. “With numerous switches deployed across cars, it is also important to ensure that they minimise power ...

From rotating magnets, Melexis is intending to generate two quadrature outputs with “minimal jitter as well as consistent 90° phase shift regardless of magnet pole pitch” from single IC containing two magnetic Hall sensors. The aim is to replace pairs of accurately-spaced single Hall sensor ICs with a single new IC, called MLX92253, that uses precision angles to replace precision ...

The AH3712 is a latching Hall-effect magnetic sensor, protected for automotive electrical conditions, in a choice of SC59, SOT23 or SIP-3 packaging. The single output is switched ‘on’ with a magnetic pole above a certain flux density, and then switched ‘off’ when exposed to the opposite pole of the same flux density magnitude. There are three parts: AH3712: south pole ...

Diodes has created a trio of tiny magnetic field triggered sensors that operate from low-voltage rails between 1.1 and 2V. Called AH1899x, they have two power pads and a binary output that is either high or low depending on the local field. Packaging is a 1 x 1 x 0.4mm DFN1010-4. To save power, each includes measure-then-sleep logic and only ...

There are two sensor choices, reed and Hall-effect switches. They have many similarities but also significant differences, explains Martin Reizner. Demand for reed switches has risen significantly in the recent past. This is primarily due to their mechanical structure, which reduces energy consumption to zero when the switch is in a passive state. That is why reed switches are an ...

Aiming at industrial and automotive applications, Diodes has introduced a portfolio of Hall-effect sensors for measuring linear and angular speed and direction. Called AH39xxQ, “they also have a 40V absolute maximum rating, enabling them to safely handle 40V load dumps”, according to the company. “Additionally, -18V of reverse voltage protection guards against incorrect battery connections. For added robustness, the ESD ...

Texas Instruments has picked the Hall effect for its latest isolated current sensor, and claims 50ppm/°C drift over temperature and ±0.5% drift over lifetime. Aimed at electric vehicle chargers and with versions available up to 75Arms, isolation in the TMCS1123 is rated at 1.1kVdc, and to withstand 5kVrms. “Assessment of device lifetime working voltages follow VDE 0884-11 for reinforced insulation, ...

Diodes has introduced three-pin SOT23 automotive qualified Hall effect magnetic sensing ICs that latch on with one magnetic pole and off with the other. The open-drain output of AH1711Q, AH1712Q and AH1713Q will be switched on when applying a magnetic south pole of sufficient strength near the top of the package (perhaps with north below the package), while a north ...