Dual Element Switches

Dual element devices are integrated circuits that contain two independent Hall-effect switches. The digital outputs are out of phase so that the outputs are in quadrature when interfaced with the proper ring magnet design (alternating pole ring magnet). This allows either the user to externally process the output signals to determine speed and direction of an encoder ring magnet or certain devices to internally process these signals and output speed and direction signals. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro patented, high-frequency chopper-stabilization technique cancels offsets in each channel providing stable operation over the full specified temperature and voltage ranges.

The high-frequency chopping circuits allow an increased analog signal-to-noise ratio at the input of the digital comparators internal to the IC. As a result, the A1230 achieves industry-leading digital output jitter performance that is critical in high performance motor commutation applications.

功能及优点
单个基片上两个匹配的霍尔效应开关
1 mm 霍尔元件间距
通过使用先进的稳定斩波拓扑实现超卓的温度稳定性和行业的抖动性能
整合 LDO 稳压器提供 3.3 V 电源
整合 ESD 输出保护和 VCC 接地保护
高灵敏开关点
可靠的 EMC 保护结构
高可靠性
同时在电源和输出管脚上提供电池反接保护