磁気ポジションセンサー

SPIおよびSENT/PWM出力対応の角度センサIC

A1338

Markets Served

Automotive

Industrial

A1338は、SPIおよびSENT/PWM出力、内蔵診断機能、ユーザがプログラム可能な機能によって柔軟な角度測定を提供し、自動車用途に最適化されたパフォーマンスを発揮します。

A1338 データシート

Product Details

Top Features

Contactless 0° to 360° angle sensor IC, for angular position and rotation direction measurement
- Circular Vertical Hall (CVH) technology provides a single-channel sensor system, with air gap independence
- 12-bit resolution possible in Low RPM mode, 10-bit resolution in High RPM mode
- Angle Refresh Rate (output rate) configurable between 25 and 3200 μs through EEPROM programming
- Capable of sensing magnetic rotational speeds up to 7600 rpm, and up to 30,000 rpm with reduced accuracy
- SPI (mode 3), and SENT (Single Edge Nibble Transmission) or PWM (Pulse-Width Modulation)*
- SPI interface provides a robust communication protocol for fast angle readings*
- SENT output supports four modes: SAEJ2716 (JAN2010) and Allegro proprietary options of Triggered SENT (TSENT), Sequential SENT (SSENT), and Addressable SENT (ASENT)*
- Programmable via Manchester Encoding on the VCC line, reducing external wiring*
- SPI and SENT interfaces allows use of multiple independent sensors for applications requiring redundancy*
Advanced diagnostics to support safety-critical applications, including:
- On-chip, user-controlled logic built-in self-test (LBIST) and signal path diagnostics
- 4-bit CRC on SPI messages
- User-Programmable Missing Magnet Error flag for notifying controller of low magnetic field level
Diagnostics are initiated over the SPI or SENT interface and can directly test proper operation of the IC in safety-critical applications
EEPROM with Error Correction Control (ECC) configuration, sensor calibration including end-of line adjustments like programmable angle reference (0°) position and rotation direction (CW or CCW)
Available in both single-die and dual-die configurations
- Dual-die devices contain two independent die housed within a single package
Absolute maximum V_CC of 26.5 V for increased robustness and direct connection to automotive vehicle battery
Allegro Sensor Bias LDO