ATS617LSG
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
- 较低的随温度变化的计时度漂移
- 低辐射放射
- VCC 引脚上的集成串联电阻可增强瞬态抗扰度
- 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
ATS617 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形状及大小的齿轮上。
用于该器件的技术基于霍尔效应。该器件结合了双元件霍尔 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可提供下降沿侦测，并可在每分钟转数极低的情况下提供稳定操作。ATS617 可替代 ATS616。
ATS617 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。
ATS617 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
ATS617LSG
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
- Immunity to signature tooth offsets
- Integrated capacitor provides analog peak and valley information
- Low timing-accuracy drift with temperature changes
- Low radiated emissions
- Integrated, series resistor on VCC pin for improved transient immunity
- Large air gap capability
- Small, integrated package
- Optimized magnetic circuit
- Undervoltage lockout (UVLO)
- Wide operating voltage range
Description
The ATS617 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 device 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 device is Hall-effect based. The device 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 provides immunity to 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-tointegrate solution provides first falling edge detection and stable operation to extremely low rpm. The ATS617 can be used as a replacement for the ATS616.
The ATS617 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 ATS617 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte tin plated leadframe.
Functional Block Diagram