EVMA120-Q-00A

EVMA120-Q-00A Datasheet

Part	Datasheet
EVMA120-Q-00A	EVMA120-Q-00A (pdf)

Related Parts	Information
MA120GQ-Z	MA120GQ-Z
MA120GQ-P	MA120GQ-P

PDF Datasheet Preview
MagAlpha MA120 Key features U V W signals for block commutation Adjustable zero 500 kHz refresh rate Ultra low latency 3 µs Serial interface for settings mA supply current Angular Sensor for 3-Phase Brushless Motor Commutation The MagAlpha MA120 is a magnetic sensor designed to replace the 3 Hall switch solutions for 3 phases 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. QFN-16 3x3mm package Since the measurement is spatially confined, the user has flexibility in terms of magnet shapes and configurations. This can help relaxing mechanical tolerances. 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 MA120 Angular Sensor for 3-Phase Brushless Motor Commutation Specifications TABLE 1 OPERATING CONDITIONS Parameters Supply voltage Supply current Supply voltage for OTP flashing Supply current for OTP flashing 1 Operating temperature Applied magnetic field Isup Vflash Iflash 1 See section 11 for more details about the supply circuit for OTP flashing. TABLE 2 SENSOR OUTPUT SPECIFICATIONS Measurement conditions VDD = V, 50 mT < B < 100 mT, Temp = -40 +125°C, unless otherwise noted Parameters Power up time INL Min +/- Typ 2 Max Unit Remark Output drift Temperature induced Magnetic field induced Voltage supply induced deg/°C deg/mT deg/mV Absolute output - serial Data output length Refresh rate 550 kHz Latency Resolution noise level Digital I/O Threshold voltage High Threshold voltage Low Rising edge slew rate Falling edge slew rate V/ns CL = 50 pF V/ns CL = 50 pF Unit V mA V mA °C mT Monolithic Power Systems, Inc. \| Gland, Switzerland \| Tel +41 22 364 63 50 \| \| Ordering Information Package Free Air Temperature TA MA120GQ QFN 3x3mm -40° to 125° * For Tape & Reel, add suffix e.g. Appendix A Definitions Resolution 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 the data 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, time until the sensor delivers valid data. Integral Non-Linearity INL Maximum deviation between the sensor output and the best line fit. 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 MA120 Angular Sensor for 3-Phase Brushless Motor Commutation Overall reproducibility 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 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. Switzerland  +41 22 364 63 50 The information provided by Monolithic Power Systems, Inc. in this document is believed to be correct. However MPS reserves the right, without further notice, i to change the product specification and/or the information in this document and ii to improve reliability, functions and design of the product and iii to discontinue or limit production or distribution of any product version. Monolithic Power Systems, Inc. does not assume any liability arising out of any application or use of any product or information, including without limitation consequential or incidental damages. All operating parameters must be validated for each customer's application by customer's technical experts. Recommended parameters can and do vary in different applications. Devices sold by MPS are covered by patents and patent applications. By this publication MPS does not assume responsibility for patent infringements or other rights of third parties which may result from its use. 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

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MagAlpha MA120

Key features

U V W signals for block commutation Adjustable zero 500 kHz refresh rate Ultra low latency 3 µs Serial interface for settings mA supply current

Angular Sensor for 3-Phase Brushless Motor Commutation

The MagAlpha MA120 is a magnetic sensor designed to replace the 3 Hall switch solutions for 3 phases 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.

QFN-16 3x3mm package

Since the measurement is spatially confined, the user has flexibility in terms of magnet shapes and configurations. This can help relaxing mechanical tolerances.

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

MA120

Angular Sensor for 3-Phase Brushless Motor Commutation

Specifications

TABLE 1 OPERATING CONDITIONS

Parameters Supply voltage Supply current Supply voltage for OTP flashing Supply current for OTP flashing 1 Operating temperature Applied magnetic field

Isup

Vflash

Iflash
1 See section 11 for more details about the supply circuit for OTP flashing.

TABLE 2 SENSOR OUTPUT SPECIFICATIONS

Measurement conditions VDD = V, 50 mT < B < 100 mT, Temp = -40 +125°C, unless otherwise noted

Parameters Power up time INL

Min +/-

Typ 2

Max Unit

Remark

Output drift Temperature induced Magnetic field induced Voltage supply induced
deg/°C deg/mT deg/mV

Absolute output - serial

Data output length

Refresh rate
550 kHz

Latency

Resolution noise level

Digital I/O Threshold voltage High Threshold voltage Low Rising edge slew rate Falling edge slew rate

V/ns

CL = 50 pF

V/ns

CL = 50 pF

Unit V mA V mA °C mT

Monolithic Power Systems, Inc. | Gland, Switzerland | Tel +41 22 364 63 50 | |
Ordering Information

Package

Free Air Temperature TA

MA120GQ

QFN 3x3mm
-40° to 125°
* For Tape & Reel, add suffix e.g.

Appendix A Definitions

Resolution 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 the data 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, time until the sensor delivers valid data.

Integral Non-Linearity INL

Maximum deviation between the sensor output and the best line fit.

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

MA120

Angular Sensor for 3-Phase Brushless Motor Commutation

Overall reproducibility
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

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. Switzerland
 +41 22 364 63 50

The information provided by Monolithic Power Systems, Inc. in this document is believed to be correct. However MPS reserves the right, without further notice, i to change the product specification and/or the information in this document and ii to improve reliability, functions and design of the product and iii to discontinue or limit production or distribution of any product version.

Monolithic Power Systems, Inc. does not assume any liability arising out of any application or use of any product or information, including without limitation consequential or incidental damages. All operating parameters must be validated for each customer's application by customer's technical experts. Recommended parameters can and do vary in different applications.

Devices sold by MPS are covered by patents and patent applications. By this publication MPS does not assume responsibility for patent infringements or other rights of third parties which may result from its use.

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

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived EVMA120-Q-00A Datasheet file may be downloaded here without warranties.

Datasheet ID: EVMA120-Q-00A 649993