AS5600 12bit Magnetic Encoder IC SOP-8

AS5600 12bit Magnetic Encoder IC SOP-8 is a high-resolution, contactless rotary position sensor designed for precision angle measurement using a simple two-pole magnet. This integrated circuit utilizes the proven Hall-effect technology to measure the absolute angle of the magnetic field, translating the rotational position into digital (I²C, PWM) and analog output signals. Consequently, the AS5600 provides superior immunity to dirt, dust, and vibration compared to traditional optical encoders, making it exceptionally reliable in harsh environments. Furthermore, its small SOP-8 package and low-power operation make it an ideal choice for high-volume, compact applications like motorized potentiometers and precision servos. Designers highly value this chip because it significantly simplifies their motion control system designs.

Key Features:

• High 12-bit Resolution: Provides 4096 positions per full 360° rotation, allowing for highly granular and accurate angular measurements.
• Contactless Sensing: Measures angle without physical contact, ensuring infinite rotational life and eliminating mechanical wear.
• Multiple Output Modes: Offers flexible output options, including I²C (for digital absolute position), PWM (Pulse Width Modulation), and analog voltage output.
• Automatic Gain Control (AGC): Features integrated AGC to compensate for variations in air gap and temperature, optimizing the magnetic field strength measurement.
• Simple Magnetic Target: Works reliably with a simple, small two-pole diametrically magnetized magnet placed near the center of the IC.

Technical Specifications:

• Resolution: 12 bits (4096 positions per revolution)
• Full-Scale Output: 360° continuous (Absolute angle)
• Accuracy (Typical): ±0.1° (Dependent on mechanical alignment)
• Supply Voltage (V_DD): 3.3 V or 5.0 V (Compatible with common logic levels)
• Output Interface Options: I²C, Analog (Ratiometric), and PWM
• Magnetic Field Range: Requires a minimum magnetic field strength of 10 mT and a maximum of 50 mT.
• Operating Temperature Range: −40°C to +125°C (Industrial Grade)

Mechanical Specifications:

• Package Type: SOP-8 (Small Outline Package)
• Sensing Principle: Planar Hall-effect sensor array
• Magnet Requirement: Diametrically magnetized cylindrical magnet (typically 4 mm to 6 mm diameter)
• Recommended Air Gap: ≈ 0.5 mm to 3.0 mm (Distance between magnet surface and IC center)

Dimensions:

• Body Length: ≈ 5.0 mm
• Body Width: ≈ 4.0 mm
• Body Height: ≈ 1.7 mm
• Pin Pitch: 1.27 mm (Standard for SOP-8)
• Weight: < 0.1 g (Ultra-lightweight)

Pinout and Wiring:

• Pin 1 (VDD): Connect to the power supply (3.3 V or 5 V).
• Pin 2 (GND): Connect to the circuit ground reference.
• Pin 3 (DIR): Direction pin. Connect to VDD or GND to select the direction of rotation measurement (CW or CCW).
• Pin 4 (PGO/PWM): Digital output pin. Outputs a high pulse if the magnetic field is too weak. This pin can also output the PWM signal.
• Pin 5 (GPO): General Purpose Output. Acts as a digital output for the Z-index or can be configured as an analog voltage output.
• Pin 6 (SCL): I²C Clock line. Connects to the host microcontroller’s SCL pin.
• Pin 7 (SDA): I²C Data line. Connects to the host microcontroller’s SDA pin.
• Pin 8 (OUT): Analog output pin. Outputs a voltage proportional to the measured angle.
• Wiring Note: Therefore, use pull-up resistors on the SCL and SDA lines when using the I²C interface.

Datasheet Reference:

• Download ams AS5600 Datasheet

Commonly Used in:

• Motor Feedback Systems: Providing precise commutation and position feedback for brushless DC (BLDC) and stepper motors.
• Robotics Joints: Measuring the exact angle of rotation in robotic arms and articulated mechanisms.
• Control Knobs: Used for creating durable, non-wearing digital potentiometers and high-end input control interfaces.

Applications:

• Non-Contact Potentiometers: Replacing traditional mechanical pots with a wear-free, high-resolution alternative.
• Servo Actuators: Sensing the absolute position of the shaft in high-performance model servos and industrial actuators.
• Flow Metering: Detecting the rotation of impellers in liquid or gas flow measurement systems.
• Angle Measurement Tools: Building digital levels, protractors, and angle gauges.

Equivalent Models:

• MLX90316 (Melexis): A magnetic rotary encoder IC, however, it features different magnetic field requirements and output protocols.
• MA702 (Monolithic Power Systems): A 12-bit magnetic angle sensor with similar resolution, consequently, it offers both SPI and PWM outputs.
• AEAT-6600-T16 (Broadcom): A high-performance magnetic encoder module often used where extreme precision and speed are required.

Package Includes:

• 1 x AS5600 12bit Magnetic Encoder IC SOP-8