Freescale Unveils New RF Control Circuit to Optimize Performance of Airfast Doherty Amplifiers

  Freescale Unveils New RF Control Circuit to Optimize Performance of Airfast
  Doherty Amplifiers

Device enables real-time digital adjustment of phase and amplitude to boost
efficiency and linearity

Business Wire

AUSTIN, Texas -- May 28, 2013

RF power market leader Freescale Semiconductor (NYSE: FSL) today introduced an
advanced gallium arsenide (GaAs) monolithic microwave integrated circuit
(MMIC) control circuit specifically designed to optimize the performance of
Freescale Airfast Doherty amplifiers.

The new MMDS20254H advanced Doherty alignment module (ADAM) enables more
accurate alignment of phase and amplitude on the carrier and peaking paths of
high-power Doherty amplifiers, thereby improving overall base station
performance. The sophisticated technology also helps enhance power efficiency
while boosting performance across the entire cellular frequency band.

“The process of optimizing Doherty amplifiers can be challenging, time
consuming and labor intensive,” said Ritu Favre, senior vice president and
general manager of Freescale’s RF business. “The highly sophisticated
capabilities of our newest ADAM product demonstrate our deep understanding of
the design challenges and issues facing RF engineers today. The MMDS20254H
solution delivers the advanced technology and comprehensive support required
to help RF engineers optimize the performance of Freescale’s industry-leading
Airfast RF power portfolio.”

Fueled by the widespread adoption of TD-LTE and W-CDMA, Doherty amplifiers
have regained prominence as an industry standard, providing high power-added
efficiency when amplifying the types of signals associated with these popular
protocols. Freescale’s MMDS20254H ADAM device offers exceptional
linearity/efficiency tradeoffs, while improving output power. The solution
includes a coupler, digitally selectable phase shifters and step attenuators,
while operating from a single voltage supply. The MMDS20254H is suitable for
transmit protocols such as W-CDMA and LTE, using frequencies from 1800 to 2200
MHz, and is controlled using a SPI interface.

Tweet this:  @Freescale introduces new GaAs #ADAM MMIC to improve efficiency,
linearity, output power

Product information

Freescale’s MMDS20254H ADAM is a GaAs MMIC based on E-pHEMT and InGaP HBT
technology. Housed in a RoHS-compliant industry-standard 6 mm QFN package, the
device allows phase and peaking adjustments from 1800 to 2200 MHz.

The MMDS20254H ADAM has a constant 90 degree phase offset between port 2 and
port 3 versus frequency (500 MHz bandwidth). Digital adjustment is possible to
optimize power amplifier performance under different conditions, including
power level, supply voltage and temperature.

Pricing and availability

The MMDS20254H is available now. A comprehensive evaluation kit including the
ADAM evaluation board, SPI connector board, control software and quick start
guide is available upon request to qualified customers. For more information,
please contact a local Freescale sales office or visit

About Freescale Semiconductor

Freescale Semiconductor (NYSE: FSL) is a global leader in embedded processing
solutions, providing industry-leading products that are advancing the
automotive, consumer, industrial and networking markets. From MPUs and MCUs to
sensors, analog integrated circuits and connectivity, our technologies are the
foundation for the innovations that make our world greener, safer, healthier
and more connected. Some of our key applications and end-markets include
automotive safety, hybrid and all-electric vehicles, next-generation wireless
infrastructure, smart energy management, portable medical devices, consumer
appliances and smart mobile devices. The company is based in Austin, Texas,
and has design, research and development, manufacturing and sales operations
around the world.

Freescale and the Freescale logo are trademarks of Freescale Semiconductor,
Inc., Reg. U.S. Pat. & Tm. Off. Airfast is a trademark of Freescale
Semiconductor, Inc. All other product or service names are the property of
their respective owners. © 2013 Freescale Semiconductor, Inc.


Freescale Semiconductor
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