Avago Debuts 6-Channel Commutation Encoder Modules for Brushless DC Motors

Avago Technologies, the world’s largest privately held semiconductor company, today announced its first series of small 6-channel optical incremental C-shaped encoder modules for Brushless DC motors used in industrial automation applications. Avago’s AEDB-9340 series modules, which include a codewheel with an optical radius of 15 mm (0.590 inch), are designed to reduce overall motor size and fit easily into round encoder housings. This latest addition to Avago’s optical encoder series provides housed encoder manufacturers with an integrated encoder that is easy to assemble and offers better switching accuracy (+/- 1 degree mechanical commutation) than conventional Hall sensors.

Typical industrial automation applications where the AEDB-9340 can be used
in Brushless DC (BLDC) motors include food and beverage processing equipment,
packaging and textile machinery, and machine tools. Other application examples
include robotic devices, industrial printers, plotters, metal processing, and
wood working equipment.

The demand for improved motor control by housed encoder and motor manufacturers
is driving the trend towards wide scale use of optical encoders with integrated
commutation output over Hall devices in BLDC motor applications. A growing number
of designers are choosing optical encoders for their motor designs because they
are less expensive and just as reliable as Hall sensors, which add to motor
length, design complexity and assembly costs.

Avago’s AEDB-9340 series enables designers to develop motors that are smaller
and easier to align reducing the time required for housed encoder assembly.
These new encoder modules also provide superior switching accuracy due to much
lower hysteresis when compared to Hall sensors, which require larger housings
and are more difficult to align. The commutation signals of one or more pole
pairs are configurable by changing the codewheel pattern. Moreover, with the
use of transmissive technology, the encoder provides better and more accurate
feedback as the BLDC motor torque ripple is reduced. Overall, the AEDB-9340
provides designers with a powerful solution that helps to simplify housed encoder


  • Two channel quadrature rotary output with ungated index pulse (A, B, I)
    for position feedback
  • Three channel integrated commutation output (U, V, W) to emulate Hall sensor feedback
  • Up to 2,500 counts per revolution (CPR)
  • Up to 150 kHz frequency response
  • TTL compatible
  • Single 5 V supply
  • Operating temperature: -10 degrees to 85 degrees C
  • Configurable pole-pair with matching 2, 3, and 4 pole-pair codewheel options
  • RoHS compliant

U.S. Pricing and Availability
Avago’s AEDB-9340 series optical encoder modules are priced at $29 each in 1,000 unit quantities and are available now in sample and production quantities. An evaluation kit, which includes an alignment tool and connector cable, is available for $325. Both products are available through Avago’s direct sales channel and worldwide distribution partners.

About Avago Motion Control Solutions
Avago Technologies is the industry-leading supplier of motion control encoders. These products meet the stringent requirements of precise positioning and velocity sensing in a wide range of applications from printers, copiers and scanners to servo and stepper motors, and robotic arms and wafer-handling machines. Avago offers "one-stop shopping" with its extensive portfolio of optical encoders, decoders and controllers. The company offers the industry’s smallest form factors, widest range of resolutions, and highest level of integration to reduce the number of components needed and shorten time-to-market. Avago’s rich motion control heritage dates back to the 1980s and its Hewlett-Packard roots.

About Avago Technologies
Avago Technologies is the world’s largest privately held semiconductor company, with approximately 6,500 employees worldwide. Avago provides an extensive range of analog, mixed-signal and optoelectronic components and subsystems to more than 40,000 customers. The company’s products serve four end markets: industrial and automotive, wired infrastructure, wireless communications, and computer peripherals. It is recognized for providing innovative, high-quality products along with strong customer service and the industry’s best on-time delivery. Avago’s heritage of technical innovation dates back 40 years to its Agilent/Hewlett-Packard roots.

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries.