MA300GQ-Z
MA300GQ-Z Datasheet
MagAlpha MA300
| Part | Datasheet |
|---|---|
MA300GQ-Z |
MA300GQ-Z (pdf) |
| Related Parts | Information |
|---|---|
MA300GQ-P |
MA300GQ-P |
EVMA300-Q-00A |
EVMA300-Q-00A |
| PDF Datasheet Preview |
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| MagAlpha MA300 Angular Sensor for 3-Phase Brushless Motor Commutation and Position Control with Side-Shaft Positioning Capability Key Features UVW Signals for Block Commutation 11-Bit Resolution Absolute Angle Encoder 500kHz Refresh Rate Ultra-Low Latency 3 µs Serial Interface for Data Readout and Settings 10-Bit Incremental Output A, B, Z Built-In Linearization for Side-Shaft Mounting 7.5mA Supply Current QFN-16 3x3mm Package The MagAlpha MA300 is a magnetic sensor designed to replace the 3 Hall switch solutions for 3-phase block commutation in brushless dc motors. The IC detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder attached to the rotor. The MagAlpha is an extremely fast acquisition and processing sensor, allowing accurate angle measurement at speeds from 0 to 120’000 RPM. Since the measurement is spatially confined, the user has flexibility in terms of magnet shapes and configurations. This helps relax mechanical tolerances and, in case the end-of-shaft position is not available, the MagAlpha MA300 operates away from the axis of rotation “side-shaft” mounting . Figure 1 Functional Block Diagram Monolithic Power Systems, Inc. | Gland, Switzerland | Tel +41 22 364 63 50 | | MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2014 Monolithic Power Systems. All Rights MA300 Angular Sensor for 3-Phase Brushless Motor Commutation and Position Control with Side-Shaft Positioning Capability Specifications TABLE OPERATING CONDITIONS Parameters Supply Voltage Supply Current Isup Supply Voltage for OTP Flashing Vflash Supply Current for OTP Flashing 1 Iflash Operating Temperature Top Thermal Resistor Sensor/Environment Applied Magnetic Field 1 See section 11 for more details about the supply circuit for OTP flashing. TABLE SENSOR OUTPUT SPECIFICATIONS Measurement conditions VDD = 3.3V, 50mT < B < 100mT, Temp = -40...+125°C, unless otherwise noted Parameters Max Unit Remark Power-Up Time INL 2 +/- Output Drift Temperature Induced Magnetic Field Induced Voltage Supply Induced deg/°C deg/mT deg/mV Absolute Output - Serial Data Output Length Refresh Rate Latency Resolution Noise Level 16 bit 550 kHz 4 µs Incremental Output Resolution Jitter Hysteresis Ordering Information Package Free Air Temperature TA MA300GQ QFN 3mmx3mm -40° to 125° * For Tape & Reel, add suffix e.g. Monolithic Power Systems, Inc. | Gland, Switzerland | Tel +41 22 364 63 50 | | MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2014 Monolithic Power Systems. All Rights MA300 Angular Sensor for 3-Phase Brushless Motor Commutation and Position Control with Side-Shaft Positioning Capability Appendix A Definitions Resolution 3 Noise Level Refresh rate The smallest angle increment distinguishable from the noise. Here the resolution is defined as 3 times the standard deviation in degrees, taken over 1000 data points at a constant position. The resolution in bits is obtained with: Rate at which new data points are stored in the output buffer. Latency The time between when the data is ready at the output, and the instant at which the shaft passes that position. The lag in degrees is , where is the angular velocity in deg/s. Power-Up Time Starting at power-up, the time until the sensor delivers valid data. Integral Non-Linearity INL Maximum deviation between the sensor output and the best line fit see Figure A1 . Jitter sensor out deg 400 350 300 250 200 150 100 ideal sensor output resolution ± 3 100 200 300 400 500 rotor position deg sensor out best straight fit 600 700 Figure A1 Absolute Angle Errors For the incremental output maximum fluctuation of the angular position of the raising edges. Overall Reproducibility Maximum variation between two readings, successive or not, of the same shaft position at a fixed magnetic field over the complete temperature range. Monolithic Power Systems, Inc. | Gland, Switzerland | Tel +41 22 364 63 50 | | MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2014 Monolithic Power Systems. All Rights MA300 |
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