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Date: 27th Aug 09
RF power devices for TD-SCDMA wireless networks from Freescale
Freescale has made available of two LDMOS RF power transistors
for discrete and integrated circuit (IC) solutions. The
LDMOS RF devices are used in power amplifiers based on Time
Division-Synchronous Code Division Multiple Access (TD-SCDMA),
a third-generation wireless standard networks.
These devices include the MRF7P20040H LDMOS FET and the
MD7IC2050N multi-stage integrated power amplifier IC. Both
devices are suitable for use in Doherty amplifiers, which
consists of two amplifiers that operate under different
transmit-signal conditions and typically require separate
transistors for each amplifier. And also both these devices
are inherently broadband, operates in both bands allocated
for TD-SCDMA (1880 to 1920 MHz and 2010 to 2025 MHz), so
the same device can be used to provide RF power in both
bands.
"Freescale continues its leadership in LDMOS RF technology
by offering high performance solutions for customers using
TD-SCDMA wireless technology in China," said Gavin
Woods, vice president and general manager of Freescale's
RF Division. "Freescale is applying its knowledge and
leadership in RF power technology to support the specific
requirements of TD-SCDMA as the technology is rapidly deployed
throughout China."
Other key features of the two devices, including Doherty
performance as measured with a six-carrier, 2025 MHz TD-SCDMA,
are:
MRF7P20040HS: 50 W peak RF output power; drain efficiency
of 43 percent; 18 dB gain at 10 W average output power;
and air-cavity ceramic package with internal matching for
ease of use.
MD7IC2050N: 70 W peak RF output power; drain efficiency
of 35 percent; 29 dB gain at 10 W average output power;
and on-chip quiescent current temperature compensation with
50 ohm on-chip input matching in a 225 degree C capable
over-molded plastic package.
Both devices are RoHS-compliant, production tested in a
symmetrical Doherty amplifier configuration, and provide
Electro-Static Discharge (ESD) protection.
For more details visit www.freescale.com/rfpower
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