ATS667LSG
真零速、高精度齿轮齿传感器 IC
功能及优点
- 抗磁偏置变化的可靠性增强
- 可实现抗振动的小型信号锁定
- 在全部工作温度范围内具有严格的工作循环和计时度
- 真零速操作
- 气隙独立开关点
- 使用增益调整和偏置调整电路实现较大的工作气隙
- 已定义通电状态 (POS)
- 较宽的工作电压范围
- 表示目标配置文件的数字输出
- 可实现高可靠性的单芯片感测 IC
- 较小的机械尺寸
- 已优化霍尔 IC 磁系
- 快速启动
- 欠压锁定 (UVLO)
描述
ATS667 是一款真零速齿轮齿传感器 IC，包括封装于单个超模压封装中的经优化的霍尔 IC-稀土磁铁配置。该独特的 IC 和封装设计可为数字齿轮齿感测应用提供用户友好型解决方案。该小型封装可便于组装并与各种形状及尺寸的齿轮一同使用。
该器件结合了双元件霍尔 IC，可响应铁磁目标产生的差分磁性信号而进行开关操作。该 IC 包含一个先进的补偿电路，以消除磁铁的不良影响和系统偏置。模拟信号的数字处理可提供独立于气隙的真零速性能，并可就汽车应用中常见的操作条件（降低的振动灵敏度）对器件性能提供动态适应。高分辨率峰值侦测 DAC 用于设置器件的自适应开关阈值。阈值中的滞后可降低磁性信号中任何异常的消极效果，这些信号与用于许多汽车应用的目标相关联。
ATS667 专为传输应用优化。该器件采用无铅 4 引脚 SIP 封装，且引脚框采用 100% 雾锡电镀。
功能方框图
ATS667LSG
True Zero-Speed, High Accuracy Gear Tooth Sensor IC
Features and Benefits
- Optimized robustness against magnetic offset variation
- Small signal lockout for immunity against vibration
- Tight duty cycle and timing accuracy over full operating temperature range
- True zero-speed operation
- Air gap independent switchpoints
- Large operating air gaps achieved through use of gain adjust and offset adjust circuitry
- Defined power-on state (POS)
- Wide operating voltage range
- Digital output representing target profile
- Single chip sensing IC for high reliability
- Small mechanical size
- Optimized Hall IC magnetic system
- Fast start-up
- Undervoltage lockout (UVLO)
Description
The ATS667 is a true zero-speed gear tooth sensor IC consisting of an optimized Hall IC-rare earth pellet configuration in a single overmolded package. The unique IC and package design provides a user-friendly solution for digital gear tooth sensing applications. This small package can be easily assembled and used in conjunction with gears of various shapes and sizes.
The device incorporates a dual element Hall IC that switches in response to differential magnetic signals created by a ferromagnetic target. The IC contains a sophisticated compensating circuit designed to eliminate the detrimental effects of magnet and system offsets. Digital processing of the analog signal provides zero-speed performance independent of air gap and also dynamic adaptation of device performance to the typical operating conditions found in automotive applications (reduced vibration sensitivity). High-resolution peak detecting DACs are used to set the adaptive switching thresholds of the device. Hysteresis in the thresholds reduces the negative effects of any anomalies in the magnetic signal associated with the targets used in many automotive applications.
The ATS667 is optimized for transmission applications. It is available in a lead (Pb) free 4-pin SIP package with a 100% matte tin plated leadframe.
Functional Block Diagram