A1698中文资料Two-Wire, True Zero Speed, High Accuracy Sensor IC with Speed and Direction Output数据手册Allegro规格书

描述 Description

The A1698 is a Hall-effect based, integrated circuit (IC) that provides a user-friendly solution for two-wire, speed sensing of ring magnets or ferrous targets (when back-biased by the user) down to zero-speed in applications where speed and direction is required. The A1698 is offered in the UB package, which integrates the IC and a high temperature ceramic capacitor in a single overmolded SIP package. The integrated capacitor provides enhanced EMC performance.

The integrated circuit incorporates Hall-effect circuits and signal processing that switches in response to differential magnetic signals created by magnetic encoders, or, when properly back-biased with a magnet, from ferromagnetic targets. The circuitry contains a sophisticated digital circuit that reduces magnet and system offsets, calibrates the gain for air gap independent switch points, and provides true zero-speed operation.

The regulated current output is configured for two-wire interface circuitry and is ideally suited for obtaining speed and direction information in wheel speed applications. The 2-pin SIP package is lead (Pb) free, with tin lead frame plating.

特性 Features

• Integrated capacitor for EMC suppression in a single over molded, miniature package
• Wide leads facilitate ease of assembly
• True zero-speed operation
• Pulse-width output protocol
• Automatic Gain Control (AGC) for air gap independent switch points
• Automatic Offset Adjustment (AOA) for signal processing optimization, providing large operating air gap range
• Single chip sensing IC for high reliability
• Fully synchronous digital logic with Scan and IDDQ testing

简介

A1698属于传感器变送器的磁性传感器-开关（固态）。由制造生产的A1698磁性传感器 - 开关（固态）该系列产品使用固态技术来检测是否存在超过某个特定幅度和/或标示的磁场，并提供指示是否存在此类磁场的双态输出。它们与磁簧开关以及线性或罗盘型固态器件不同，前者通过使用移动机械部件来提供类似的功能，后者提供指示所施加磁场的强度和/或方向的可变输出。