ATS685中文资料Two-Wire, Zero Speed Differential Gear Tooth Sensor IC数据手册Allegro规格书

描述 Description

The ATS685LSH is an optimized Hall-effect sensing integrated circuit and rare-earth pellet combination that provides a user-friendly solution for true zero-speed digital gear-tooth sensing in two-wire applications. The sensor IC consists of a single-shot molded plastic package that includes a samarium cobalt pellet, a pole piece, and a Hall Effect IC that has been optimized to the magnetic circuit. This small package can be assembled simply and used in conjunction with a wide variety of gear shapes and sizes.

The single integrated circuit incorporates a dual element Hall-effect sensor IC and signal processing circuitry that switches in response to differential magnetic signals created by ferromagnetic targets. The device contains a sophisticated compensating circuit to eliminate magnetic and system offsets. Digital tracking of the analog signal is used to achieve true zero speed operation. Advanced calibration algorithms are used to adjust the device gain and offset at power-up, resulting in air gap independent switchpoints, which greatly improves output accuracy. In addition, advanced algorithms mitigate the effect of system anomalies such as target vibration and sudden changes in air gap.

The regulated current output is configured for two-wire operation. This sensor IC is ideal for obtaining edge and duty cycle information in gear-tooth–based applications such as transmission speed.

The ATS685 is provided in a 4-pin SIP package that is lead (Pb) free, with 100% matte tin leadframe plating.

特性 Features

• Fully optimized differential digital gear tooth sensor IC
• Running Mode Lockout
• Unique algorithms for increased vibration immunity
• AGC and reference adjust circuit
• Air gap independent switchpoints
• Digital output representing gear profile
• Precise duty cycle throughout operating temperature range
• Large operating air gap range
• Short power-on time
• True zero-speed operation
• Undervoltage lockout (UVLO)
• Wide operating voltage range
• Internal current regulator for two-wire operation
• Single-chip sensing IC for high reliability
• Robust test coverage capability using Scan Path and IDDQ measurement

简介

ATS685属于传感器变送器的磁性传感器-开关（固态）。由制造生产的ATS685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。