- Angular Position Sensors
8-Bit to 12.5-Bit, 3μs Low-Latency Contactless Angle Sensor
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The MA734 is a MagAlpha digital angle sensor that detects the absolute angular position of a permanent magnet (typically a diametrically magnetized cylinder on a rotating shaft). Fast data acquisition and processing provide accurate angle measurements, from static angle measurements to high-speed rotation. The digital filtering is adjustable to optimize control loop performance when used in servo motor applications.
This sensor supports a wide range of magnetic field strengths and spatial configurations. Both end-of-shaft and side-shaft (off-axis mounting) configurations are supported. The MA734 detects the strength of the magnetic field, and includes configurable thresholds that can be used for push-button human-machine interface (HMI) applications, or for diagnostic purposes. On-chip, non-volatile memory (NVM) provides storage for configuration parameters, such as the reference zero-angle and magnetic field detection thresholds. It is also possible to configure the MA734 with volatile registers without accessing the NVM.
The MA734 is available in a QFN-16 (3mmx3mm) package.
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Features & Benefits
- Configurable 8-Bit to 12.5-Bit Resolution Absolute Angle Encoder
- 3μs of Latency at Constant Rotation Speed
- Serial Peripheral Interface (SPI) for Digital Angle Readout and Chip Configuration
- Configurable Magnetic Field Strength Detection for Diagnostic Checks
- NVM Read/Write Command Extends Memory Life
- 3.3V, 11mA Supply Current
- -40°C to +125°C Operating Temperature
- 0rpm to 60,000rpm Rotation
- Interrupt Out when Angle Change Is Detected
- Available in a QFN-16 (3mmx3mm) Package
Active Part Numbers:
The TBMA734-Q-RD-00A is the round evaluation board for the MA734 MagAlpha magnetic position sensor. This configuration is used for end-of-shaft sensing.
It requires the EVKT-MACOM communication kit and the Macom App Software to evaluate MagAlpha functionality and performance with the set-up, such as noise level, refresh rate, start-up time, and magnetic field dependence.
In addition to this round (RD) evaluation board, there is a long format (LT) version, in which the sensor is mounted on the edge of the board and can therefore be used in both side-shaft and end-of-shaft configurations.
Long Evaluation Board for the MA734