The A1337 provides contactless angle measurements with advanced diagnostics for safety-critical applications. Supports SPI and SENT interfaces, integrated turns counter, low-power modes, and flexible configuration options.
Product Details
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, 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
- Integrated Turns Counter tracks magnet rotation in CW/CCW direction from –1280 to +1280 counts, even when vehicle is in key-off state
- Count updates are user-selectable to be every 180° or every 45° degree of magnet rotation
- WAKE pin for external wake-up trigger can be used to automatically detect motion > 100 rpm
- Low-Power Mode enables direct connection to vehicle battery
- User-programmable duty cycle optimizes low-power mode current consumption (typically 85 μA per die)
- Ultralow-power Transport mode
- 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 VCC of 26.5 V for increased robustness and direct connection to automotive vehicle battery
* See Selection Guide for more details.
Target Application
- Electronic Power Steering
- 2W-xEV Power
