ATS675
专为汽车凸轮传感应用而优化的自行校准 TPOS 速度传感器 IC
特点
- 斩波稳定、专为汽车凸轮传感应用而优化
- 可快速从 TPOS 模式转换至高精度运行模式的开关点
- 对磁过冲和峰值间值变化导致信号异常的高容忍度
- 在全部工作温度范围内具有严格的计时度
- 真零速操作
- 用于气隙独立开关点的自动增益控制电路
- 可在低至 3.3 V 电压下工作
- 表示目标配置文件的数字输出
- 欠压锁定 (UVLO)
- 已获得专利的霍尔IC-稀土磁铁系统
描述
ATS675 是 Allegro? 真通电状态 (TPOS) 传感器 IC 系列的下一代产品，与前几代产品相比，可提供更的度。ATS675 可在零速下工作并可提供 TPOS 信息。
此器件包含一个单元件霍尔 IC，其中带有经优化的定制磁路，可响应铁磁目标生成的磁性信号而进行开关操作。IC 包含一个先进的数字电路，该电路设计可减少磁铁不良影响和系统偏差。信号处理设计使设备可在目标零速情况下工作，不依赖气隙并可动态适应汽车凸轮轴速度传感应用的特定工作条件。
高分辨率峰值侦测 DAC 用于设置器件的自适应开关阈值，即使在目标异常情况下仍可确保高度。阈值内部磁滞减少了与多种汽车应用中使用的目标有关的磁信号异常（例如磁过冲）的不良影响。此设备的输出结果是铁磁体目标配置文件的数字化表示。ATS675 还带有一个低带宽滤波器，可提高对噪声干扰的容忍度和 IC 的信噪比。
此设备无铅封装，采用 100% 雾锡电镀引脚框。
功能方框图
ATS675
Self-Calibrating TPOS Speed Sensor IC Optimized for Automotive Cam Sensing Applications
Features
- Chopper stabilized; optimized for automotive cam sensing applications
- Rapid transition from TPOS mode to high accuracy running mode switchpoints
- High immunity to signal anomalies resulting from magnetic overshoot and peak-to-peak field variation
- Tight timing accuracy over full operating temperature range
- True zero-speed operation
- Automatic Gain Control circuitry for air gap independent switchpoints
- Operation at supply voltages down to 3.3 V
- Digital output representing target profile
- Undervoltage lockout (UVLO)
- Patented Hall IC-rare earth pellet system
Description
The ATS675 is the next generation of the Allegro? True Power-On State (TPOS) sensor IC family, offering improved accuracy compared to prior generations. The ATS675 provides absolute zero-speed performance and TPOS information.
The device incorporates a single-element Hall IC with an optimized custom magnetic circuit that switches in response to magnetic signals created by a ferromagnetic target. The IC contains a sophisticated digital circuit designed to eliminate the detrimental effects of magnet and system offsets. Signal processing is used to provide device performance at zero target speed, independent of air gap, and which adapts dynamically to the typical operating conditions found in automotive applications, particularly camshaft-sensing applications.
High resolution peak-detecting DACs are used to set the adaptive switching thresholds of the device, ensuring high accuracy despite target eccentricity. Internal hysteresis in the thresholds reduces the negative effects of anomalies in the magnetic signal (such as magnetic overshoot) associated with targets used in many automotive applications. The resulting output of the device is a digital representation of the ferromagnetic target profile. The ATS675 also includes a low bandwidth filter that increases the noise immunity and the signal-to-noise ratio of the IC.
The device package is lead (Pb) free, with 100% matte tin leadframe plating.
Functional Block Diagram