AS5311-ATST

AS5311-ATST is a high resolution magnetic linear encoder. It is a contactless high resolution magnetic linear encoder for accurate linear motion and off-axis rotary sensing with a resolution down to <lt/>0.5µm. It is a system-on-chip, combining integrated Hall elements, analog front end, and digital signal processing on a single chip, package. A multi-pole magnetic strip or ring with a pole length of 1.0mm is required to sense the rotational or linear motion. The magnetic strip is placed above the IC at a distance of typ. 0.3mm. The absolute measurement provides an instant indication of the magnet position within one pole pair with a resolution of 488nm per step (12bit over 2.0mm). This digital data is available as a serial bit stream and as a PWM signal. The application includes micro-actuator feedback, servo drive feedback, robotics, and replacement of optical encoders.

• Two 12bit digital absolute outputs, serial interface and pulse width modulated (PWM) output
• Incremental output with Index
• “Red-Yellow-Green” indicators monitor magnet placement over the chip
• Contactless motion and position sensing
• Highest reliability and durability in harsh environments
• High resolution, Control of high precision movements
• Immune to external magnetic stray fields
• Lower material cost (no magnetic shielding needed)
• Supply current is 16mA typical
• TSSOP-20 package, Ambient temperature range from -40 to 125°C