A1331: Precision, Micro Power Hall-Effect Angle Sensor IC With Integrated Turns Counter

This part is discontinued. Samples are no longer available. Date of status change: December 5, 2018.

A1331是一个360°角传感器IC，其提供基于磁圆形垂直大厅（CVH）技术的非接触式高分辨率角位置信息。它具有一个系统 - onchip（SoC）架构，包括：CVH前端，数字信号处理和数字（SPI）输出。A1331非常适用于需要高速0°至360°角测量的汽车应用，例如电子亚博尊贵会员动力转向（EPS）和节流系统。

Besides providing full-turn angular measurement, the A1331 supports a Turns Counter function that can operate in Low Power mode. This makes the A1331 ideal for applications where, for example, an automobile is in a “key off” position but steering wheel turns must still be tracked.

The A1331 supports a Low RPM mode for slower rate applications and a High RPM mode for high speed applications. High RPM mode is for applications that require higher refresh rates to minimize error due to latency. Low RPM mode is for applications that require higher resolution operating at lower angular velocities.

As part of its signal processing functions, the A1331 includes automotive grade temperature compensation to provide accurate output over the full operating temperature and voltage ranges. The A1331 also includes EEPROM technology for end-of-line calibration.

The A1331 is available in a 24-pin TSSOP lead free package with 100% matte-tin leadframe plating.

• Contactless 0° to 360° angle sensor IC, for angular position, rotational speed, and direction measurement
• Dual independent die housed within a single package
• Circular Vertical Hall (CVH) technology provides a single channel sensor system
• 12-bit resolution possible in low RPM mode, 10-bit resolution in high RPM mode
• 角度刷新率（输出速率）通过EEPROM编程可配置25到3200μs
• Capable of sensing magnet rotational speeds in excess of 7600 rpm
• SPI interface allows use of multiple independent sensors for applications requiring redundancy
• EEPROM programmable angle reference (0°) position and rotation direction (CW or CCW)
• 绝对最大V._CCof 26.5 V for automotive battery-powered applications
• Turns Counter function active during “key off” in automotive application.
  • Count updates every 180° of magnet rotation
  • Tracks magnet rotations in CW/CCW direction from –512 to +511 counts
  • Low power mode (100 µA per die)