A1230LK-T

• Product Introduction

The A1230 is a two-channel, bipolar switch with two Hall-effect sensing elements, each providing independent digital outputs for speed and direction signal processing. Hall components are optically lithographed with calibration accuracy of over 1 μm. Maintaining a precise mechanical position between the two active Hall elements eliminates the major manufacturing difficulties encountered in small pitch direction finding applications. The A1230 is a highly sensitive, temperature-stable magnetic sensing device that is ideal for sensing toroidal magnet velocity and direction systems in harsh automotive and industrial environments.

The A1230 monolithic integrated circuit (IC) contains two independent Hall-effect bipolar switches spaced 1 mm apart. The digital output is out of phase, so the output is orthogonal when interacting with the appropriate ring magnet design. This allows for easy processing of speed and direction signals. Amplifiers with very low drift ensure symmetry between switches to keep the signal orthogonal. Allegro's® patented stabilized chopper technology eliminates offset from each channel for stable operation over the entire specified operating temperature and voltage range.

In addition, the high-frequency chopper circuitry enables a higher analog signal-to-noise ratio under the condition of the IC's internal digital comparator input. This allows the A1230 to achieve industry-leading digital output jitter performance, which is critical for high-performance motor commutation applications. The chip low-dropout linear regulator allows the device to be used over a wide operating voltage range. Factory programming after assembly ensures a symmetrical sensitive switch point between the two switches.

The A1230 is available in a plastic 8-pin SOIC surface mount package (L) and a plastic 4-pin SIP (K). Both packages are available in a temperature range of –40°C to 150°C. Each package is lead-free and the pin frame is 100% matte tin plated.

• 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领先的抖动性能
• 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