Analog Devices’ Magnetic Angle Sensor Technology Delivers Industry’s Highest Performance for Precision DC Motor Controls
October 28 2014 - 8:00AM
Business Wire
ADI’s ADA4571 sensor directly measures the
shaft position in brushless DC motors, reducing noise and
optimizing motor smoothness and torque in automotive and industrial
applications.
Analog Devices, Inc. (NASDAQ: ADI) introduced today the
industry’s highest precision, highest speed magnetic angle sensor.
The high-resolution ADA4571 sensor is four times more accurate
(0.5° max), 60 percent faster and uses 40 percent less power than
competing angle sensors.
The ADA4571 directly measures motor position to reduce noise,
optimize smoothness and torque performance, and help designers of
brushless DC (BLDC) motors meet tighter environmental, noise and
energy requirements. The new sensor is automotive qualified and
integrates a custom mixed-signal signal conditioning IC and sensing
element based on Anisotropic Magneto-Resistive (AMR) technology.
The new sensor enables direct, non-contact and wear-free angle
measurement in a range of motor applications, including automotive
systems such as electric power-assisted steering, braking, active
suspension and stability control.
- Order samples, evaluation boards or
download data sheets: http://www.analog.com/ADA4571
- For reference designs and technical
content: Get questions answered by ADI engineers on EngineerZone™,
ADI’s online technical support community:
https://ez.analog.com/welcome
- For automotive applications using the
ADA4571: http://automotive.analog.com/en/segment/am.html
The integrated AMR and precision signal conditioning technology
allows the ADA4571 to operate independently of magnet drifts due to
lifetime, thermal influences or mechanical stress, which enables
high-accuracy readouts in harsh environments.
High accuracy position feedback information enables more
effective commutation of the motor and better control of torque and
speed performance especially in low RPM applications. The new
sensor also enables high-speed motor operation up to 50,000 RPM
while the direct angle measurement principle reduces the effects of
vibration and noise that can degrade motor performance. Better
torque control improves motor efficiency, lowers emissions and heat
and extends operating life. Additionally, the low phase delay (2µs)
enables fast closed loop control and improves responsiveness in
high-dynamic applications such as industrial servo motors, robotics
and electric power steering.
The ADA5471 runs on a 2.7- to 5.5-V supply, consumes just 6.5 mA
of power, and includes a low-power sleep mode that expands
application usage to remotely powered systems. Additionally, the
sensor does not get damaged under high magnetic field conditions
and has negligible hysteresis; while the low temperature and
lifetime drift performance reduces or eliminates the need for
calibration. The sensor also supports advanced diagnostics for use
in high availability and safety critical applications.
ADA4571 Magnetic Angle Sensor Key Features
- Low angular error: 0.5° max
- High speed: 50,000 RPM with a 2µs phase
delay
- Low noise: 500 uVrms
- Low power: 6.5 mA
- -40°C to 150°C operation
Pricing and Availability
Product Availability
Price Each Per 10K
Packaging
ADA4571
NOW $1.98
8-lead SO
About Analog Devices
Innovation, performance, and excellence are the cultural pillars
on which Analog Devices has built one of the longest standing,
highest growth companies within the technology sector. Acknowledged
industry-wide as the world leader in data conversion and signal
conditioning technology, Analog Devices serves over 60,000
customers, representing virtually all types of electronic
equipment. Celebrating over 40 years as a leading global
manufacturer of high-performance integrated circuits used in analog
and digital signal processing applications, Analog Devices is
headquartered in Norwood, Massachusetts, with design and
manufacturing facilities throughout the world. Analog Devices' is
included in the S&P 500 Index.
EngineerZone is a trademark of Analog Devices, Inc.
Follow ADI on Twitter at http://www.twitter.com/ADI_News
To subscribe to Analog Dialogue, ADI's monthly technical
journal, visit: http://www.analog.com/subscribe.
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Analog Devices Inc.Sarah Shieh,
781-937-2572sarah.shieh@analog.comorPorter
NovelliAndrew MacLellan,
617-897-8270andrew.maclellan@porternovelli.com
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