MA302

Part: MagAlpha family — MPS (Monolithic Power Systems)

Type: Magnetic Angle Position Sensors

Description: The MPS MagAlpha family offers magnetic angle position sensors utilizing the patented SpinAxis™ Hall measurement technique for instantaneous digital angle position, supporting rotation speeds from zero to over 100kRPM with resolutions up to 14 bits.

Operating Conditions:

• Supply voltage: 3.3V
• Operating temperature: -40 to +125°C
• Magnetic field range: 15mT to 150mT (working range)

Absolute Maximum Ratings:

Key Specs:

• Sample rate: up to 1μs
• Latency: 10μs at 100kRPM
• Resolution: up to 14 bits
• Rotation speed: 0 to >100kRPM
• Power consumption: 12mA (at 3.3V)
• MA8xx family effective angle resolution: 8 bit
• MA1xx/MA3xx family effective angle resolution: 9-14 bit (MA330), 12 bit (MA102, MA302, MA310)
• MA850 PWM frequency: ~50kHz

Features:

• Instantaneous angle sensing
• High resolution up to 14 bits
• Support for end-of-shaft and side-of-shaft topologies
• Low power consumption
• Non-volatile memory for configuration parameters
• Programmable threshold magnetic field strength detection (push-button functionality)
• SPI/SSI digital angle output
• ABZ incremental interface
• PWM output
• UVW commutation signals with programmable pole pairs
• Magnetic field strength monitoring for diagnostics
• Selectable digital filter bandwidths (MA330)

Applications:

• Rotary Human-Machine-Interface (HMI) applications (e.g., rotary knobs)
• Brushless DC (BLDC) motor control
• Servo motor position control
• Process automation
• Robotics
• Automotive actuators
• Power tools

Package:

• QFN-16 (3x3mm)

• SPI interface for direct digital angle reading and chip configuration
• ABZ encoder interface with up to 1024 pulses per channel per turn
• UVW commutation interface with pole pair emulation from a simple two-pole magnet
• Magnetic field strength monitoring for diagnostics
• One-time programmable or reprogrammable non-volatile memory for storage of zero position and other programmable chip configuration parameters

Figure 8: MagAlpha MA3xx Block Diagram

An example of a complete miniature servo drive implementation using the MA302 is shown in Figure 9.

Figure 9: Servo Motor Example using the MA3xx Sensor