The A3250 and A3251 from Allegro MicroSystems are a new range of programmable Hall-effect sensor/switches that are ideally suited to proximity or gear-tooth sensing in automotive and industrial applications.
Each sensor can be programmed to the desired magnetic switch point, allowing optimisation of the sensor airgap and timing accuracy performance after final packaging. The A3250's output turns on, and the A3251 turns off, with a sufficiently large south-pole magnetic field.
Each sensor incorporates a single-element Hall IC that switches in response to magnetic signals created by a ferrous target. The programmability of the circuit eliminates magnet and system offsets such as those caused by tilt, yet provides zero-speed detection capabilities without the associated running jitter inherent in classical digital solutions.
A propriety dynamic offset cancellation technique, with an internal high-frequency clock, minimises the residual offset voltage. Many problems normally associated with low-level analog signals are minimised by having the Hall element and amplifier in a single chip.
Other features include on-chip supply-transient protection, output short-circuit protection, and reverse battery protection.
The A3250 and A3251 are available for operating temperature ranges of -40 to +85°C and -40 to +150°C. Two package styles - a miniature SOT-89/TO-243AA transistor package for surface-mount applications and a three-lead ultra-miniature single-inline package for through-hole mounting - provide a magnetically optimised configuration for most applications.
Microchip enhances TrustMANAGER platform Altron Arrow
DSP, Micros & Memory
Firmware over-the-air updates and remote cryptographic key management provide scalable solutions for addressing IoT security challenges.
Read more...Adaptive optics’ power solution Altron Arrow
Opto-Electronics
Vicor power-dense adaptive optical modules enable colossal telescopes to look into the past for deep space discoveries.
Read more...Wide input voltage buck-boost converter Altron Arrow
Power Electronics / Power Management
The MAX77859 from Analog Devices is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range of between 2,5 and 22 V.
Read more...High-performance processor for edge-AI Altron Arrow
DSP, Micros & Memory
The STM32MP23 microprocessor from STMicroelectronics is the latest addition to the STM32MP2 series, designed to meet the demands of industrial, IoT, and edge AI applications.
Read more...6 GHz power amplifier Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Analog Devices’ ADPA1116 is a 0,3 to 6 GHz GaN-based power amplifier with a saturated output power (POUT) of 39,5 dBm.
Read more...STM releases innovative GNSS receiver Altron Arrow
Telecoms, Datacoms, Wireless, IoT
STMicroelectronics recently introduced the Teseo VI family of global navigation satellite system receivers aimed at high-volume precise positioning use cases.
Read more...Integrated STM32WBA6 wireless microcontrollers Altron Arrow
DSP, Micros & Memory
Cost-efficient and highly integrated embedded controllers for emerging 2,4 GHz wireless applications in smart home, health, factory, and agriculture.
Read more...Ultra-low-power MCU with FPU Arm Cortex-M33 Altron Arrow
DSP, Micros & Memory
STMicroelectronics has expanded its STM32 ultra-low-power family with the launch of the STM32U3 for cost-sensitive applications in industrial, medical, and consumer electronics devices.
printer friendly version