Allegro MicroSystems Inc. High Resolution Programmable Angle Sensor A1337LLETR-T

The A1337 is a 0° to 360° angle sensor IC that provides contactless high-resolution angular position information based on magnetic circular vertical Hall (CVH) technology. It has a system-on-chip (SoC) architecture that includes: a CVH front end, digital signal processing, digital SPI, and SENT or PWM outputs. It also includes on-chip EEPROM technology, capable of supporting up to 100 read/write cycles, for flexible end-of-line programming of calibration and configuration parameters. The A1337 is ideal for automotive applications requiring 0° to 360° angle measurements, such as electronic power steering (EPS), seatbelt motor position systems, rotary PRNDLs, and throttle systems. The A1337 was designed with safety-critical application requirements in mind. It includes user-controlled, on-chip logic built-in self-test (LBIST) and full signal path diagnostics to enable customers to determine if the IC is operating in a proper manner. The A1337 includes integrated Turns Counter and Low-Power Mode functions. The Low-Power Mode enables the device to be connected directly to the vehicle battery and minimizes power consumption when the vehicle is in the key-off state. The Turns Counter function allows the device to keep track of either 45° or 180° turns of the motor when the part is in Low-Power Mode, monitoring the motor position even when the vehicle is in the key-off state. The A1337 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. The A1337 is available in a single-die 14-pin TSSOP and a dual-die 24-pin TSSOP. Both packages are lead (Pb) free with 100% mattetin leadframe plating.