ATS616LSG
动态、自行校准、峰值侦测、差分霍尔效应齿轮齿传感器 IC

功能及优点

• 自行校准以期达到严格的计时度
• 齿侦测
• 抗气隙变化和系统偏移
• 消除信号齿偏移效应
• 集成电容器提供模拟峰值和谷值信息
• 极低的随温度变化的计时度漂移
• 较大的气隙容量
• 小型集成封装
• 已优化磁路
• 欠压锁定 (UVLO)
• 较宽的工作电压范围

描述

ATS616 齿轮齿传感器 IC 是峰值侦测器件，其使用自动增益控制和集成电容器，在即便是很低的工作速度情况下也能提供相当的齿轮边缘检测。每个封装均包括一个耐高温的塑料外壳，集成钐钴磁铁、极片以及专为磁路优化的差分开路集电极霍尔 IC。该小型封装可以很方便地组装并使用在不同齿轮形状及尺寸上。

用于该电路的技术基于霍尔效应。该芯片结合了双元件霍尔 IC，可响应铁氧体目标产生的差分磁性信号而进行开关操作。该复杂的处理电路包含一个 A 至 D 转换器，可自行校准（标准化）器件的内部增益以最小化气隙变化的效果。已取得专利的峰值侦测滤波电路消除了磁铁和系统偏移，并且能够区别相对快速的变化，如倾斜、齿轮摆动和偏心距引起的变化。此集成简便的解决方案提供齿侦测，并可在每分钟转数极低的情况下提供稳定操作。ATS616 可替代ATS612LSB，可无需使用 ATS612LSB 所需的外部峰值保持电容器。

ATS616 在系统使用齿轮齿配置收集速度、位置和计时信息时可谓理想之选。该器件尤其适合那些需要极其的工作循环控制或的边缘检测（如汽车凸轮轴感测）的应用。

ATS616 采用 4 引脚单列直插式封装 (SIP)，该封装无铅，且引脚框采用 100% 雾锡电镀。

功能方框图

ATS616LSG
Dynamic Self-Calibrating Peak-Detecting Differential Hall Effect Gear Tooth Sensor IC

Features and Benefits

• Self-calibrating for tight timing accuracy
• First-tooth detection
• Immunity to air gap variation and system offsets
• Eliminates effects of signature tooth offsets
• Integrated capacitor provides analog peak and valley information
• Extremely low timing-accuracy drift with temperature changes
• Large air gap capability
• Small, integrated package
• Optimized magnetic circuit
• Undervoltage lockout (UVLO)
• Wide operating voltage range

Description

The ATS616 gear-tooth sensor IC is a peak-detecting device that uses automatic gain control and an integrated capacitor to provide extremely accurate gear edge detection down to low operating speeds. Each package consists of a high-temperature plastic shell that holds together a samarium-cobalt pellet, a pole piece, and a differential open-collector Hall IC that has been optimized to the magnetic circuit. This small package can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes.

The technology used for this circuit is Hall-effect based. The chip incorporates a dual-element Hall IC that switches in response to differential magnetic signals created by ferromagnetic targets. The sophisticated processing circuitry contains an A-to-D converter that self-calibrates (normalizes) the internal gain of the device to minimize the effect of air-gap variations. The patented peak-detecting filter circuit eliminates magnet and system offsets and has the ability to discriminate relatively fast changes such as those caused by tilt, gear wobble, and eccentricities. This easy-to-integrate solution provides first-tooth detection and stable operation to extremely low rpm. The ATS616 can be used as a replacement for the ATS612LSB, eliminating the external peak-holding capacitor needed by the ATS612LSB.

The ATS616 is ideal for use in systems that gather speed, position, and timing information using gear-tooth-based configurations. This device is particularly suited to those applications that require extremely accurate duty cycle control or accurate edge-detection, such as automotive camshaft sensing.

The ATS616 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte tin plated leadframe.

Functional Block Diagram