Spezifikationen
AS5040-ASST is an ams OSRAM contactless 10-bit magnetic rotary encoder SoC integrating Hall sensor array, analog front-end and digital signal processing, designed for full 360° absolute angular position detection with multi-mode output, replacing fragile optical encoders and mechanical potentiometers in industrial, automotive and precision motion equipment.
👉 It’s not a low-resolution analog magnetic sensor with single signal output.
👉 It’s a fully programmable multi-interface absolute rotary position IC with stray magnetic field immunity, delivering long lifespan and maintenance-free operation in dusty, vibrating harsh environments.
Key Features of AS5040-ASST Magnetic Rotary Encoder IC
Motion control and automotive hardware engineers select AS5040-ASST for contactless wear-free measurement, flexible configuration and wide temperature stability:
- 10-bit absolute angle resolution, 1024 distinct positions per full rotation (0.35° angular step accuracy)
- Contactless detection principle: only a simple 2-pole on-axis magnet (mounted above or below chip) required for position reading
- Built-in stray magnetic field suppression, stable measurement without extra magnetic shielding components
- Multi-channel synchronous output interfaces for flexible system integration:
- SSI serial absolute digital interface for high-precision MCU position reading
- 10-bit PWM analog pulse-width output for direct ADC sampling
- Incremental A/B quadrature + index signal compatible with standard optical encoders
- UVW 3-phase commutation signal dedicated for BLDC brushless motor drive
- Step/Direction pulse output for stepper motor control systems
- User one-time programmable (OTP) parameters: zero-angle offset, resolution, pole pair count for on-site calibration
- Built-in magnet fault diagnostic logic to monitor magnet offset, loss or abnormal distance
- Supports maximum mechanical rotation speed up to 30,000 RPM for high-speed spindle and motor equipment
- Dual supply compatible: internal regulator supports 4.5V–5.5V main power input, also works with 3.3V control logic systems
- 16-pin SSOP surface mount package, tape-and-reel (TR) shipping format for mass SMT production
- Wide industrial/automotive temperature range: -40°C to +125°C junction operating temperature
- AEC-Q100 automotive qualified grade, RoHS3 lead-free compliant, MSL3 moisture sensitivity rating
- Daisy-chain SSI serial connection design for multi-angle synchronous detection systems
- No mechanical friction, zero wear, far longer service life than optical encoders and rotary potentiometers
Typische Anwendungen
BLDC brushless motor commutation, servo and stepper motor closed-loop motion control
Industrial robotic joint angle positioning and multi-axis CNC rotary table detection
Automotive electronics: steering angle sensing, accelerator pedal, gearbox encoder, headlight adjustment
Power tools, handheld industrial testing equipment and rotary actuator position feedback
Office automation: printers, scanners, copiers rotary roller position monitoring
Industrial control panel rotary switches, replacement of mechanical potentiometers
Energy equipment valve angle feedback and flow control rotary position sensors
Medical precision instruments and lab automation rotary positioning modules
Outdoor monitoring equipment with dust/vibration harsh working conditions
LXB Semicon supplies original AS5040-ASST magnetic rotary encoder IC
