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TI Introduces Industry's First Single-Chip Digital Downconverter And



RELATED SYMBOLS: (TXN)

PALO ALTO, Calif., Jan 13, 2003 /PRNewswire via COMTEX/ -- Texas Instruments
Incorporated (NYSE: TXN) (TI) today introduced a new four-channel wideband
digital downconverter and upconverter that is ideal for radios in 3G wireless
base transceiver systems. The flexible four-channel device is the first chip
that provides both digital downconversion and upconversion functions in a single
package. Targeted mainly towards CDMA2000 and W-CDMA base station systems, the
new device also offers superior digital radio performance for other applications
such as wireless repeaters, cable modem radios, wireless instrumentation and
defense-based digital radio systems. (see http://www.ti.com/GC5016rls_wi )

TI's GC5016 enables wireless infrastructure manufacturers to take advantage of
the industry's best performance in digital down and upconversion in a single
device. It offers outstanding 3G performance with 150 MSPS clocking, flexible
wideband digital filtering, many input-output interfacing options and very low
power dissipation.

"We will be combining downconversion and upconversion blocks at even higher
levels of integration in future devices," said Brad Evans, systems engineer for
TI's wireless infrastructure radio products group. "This will give base station
manufacturers a proven low-cost high-performance option over developing
expensive in-house custom ASIC-based radio chain solutions."

Industry's Most Versatile Digital Converter

The GC5016 can provide either four channels of digital downconversion, four
channels of digital upconversion, or two channels of downconversion and two
channels of upconversion simultaneously. Using a single device for
downconversion and upconversion for receive and transmit functions,
manufacturers can drive costs down for base stations, macrocell, microcell and
picocell base stations as well as wireless repeaters. This also means that base
station radio engineers need to become familiar with only one device for both
downconverter and upconverter functions.

Each of the GC5016's four downconverter or upconverter channels can be
independently configured. Operating mode, tuning frequency, channel filtering,
automatic gain control and input-output options can be programmed over a
microprocessor bus. Channel filtering consists of a six-stage CIC filter and a
programmable FIR filter. The FIR filter provides up to 255 taps for UMTS and
CDMA2000 modes. Spurious-free dynamic range is an industry-best at better than
-115 dBC. Power dissipation is about 600 milliWatts when clocking at 100 MHz
with four channels configured for UMTS operation. Together, these features
provide performance better than any other 3G digital downconverter or
upconverter device available today.

Applications requiring wider bandwidth such as cable modem head-end systems,
wireless instrumentation and defense/aerospace radio systems can benefit from
the GC5016's special double-rate input and output mode enabling effective sample
rates to 300 MSPS, the fastest in the industry.

In downconversion mode, the GC5016 accepts signal data from an analog-to-
digital converter such as TI's 12-bit 80 MSPS ADS5410. The GC5016 tunes the
desired signal to baseband and then isolates the desired signal by applying
pulse-shape filtering. The isolated signal is then decimated and output for
subsequent chip-rate and symbol rate processing. Further signal processing and
demodulation is handled with a programmable DSP chip such as TI's TMS320C6416
DSP.

In upconversion mode, the GC5016 accepts complex digital signal data from a
baseband source. This signal data is then interpolated, pulse-shape filtered,
modulated to a programmed intermediate frequency, and then output to an external
digital-to-analog converter such as TI's 14-bit 125 MSPS DAC2904. The GC5016
also supports complex outputs for direct I/Q upconversion and power amplifier
digital pre-distortion linearization processing.

Download Free Datasheet Today

Limited preliminary samples of the GC5016 wideband digital downconverter and
upconverter are available today from TI at a price of $65 per 1,000 units.
Production devices will be widely available in the third quarter of 2003.


Download the GC5016 data sheet today at (www.ti.com/GC5016ds_wi ).

Texas Instruments Incorporated provides innovative DSP and analog technologies
to meet our customers' real world signal processing requirements. In addition to
Semiconductor, the company's businesses include Sensors & Controls, and
Educational & Productivity Solutions. TI is headquartered in Dallas, Texas, and
has manufacturing, design or sales operations in more than 25 countries.

Texas Instruments is traded on the New York Stock Exchange under the symbol TXN.
More information is located on the World Wide Web site at www.ti.com .

TRADEMARKS

All trademarks and registered trademarks are the property of their respective
owners.

SOURCE Texas Instruments Incorporated


CONTACT: Becky Nevers of Texas Instruments Incorporated,
[phone], or [e-mail] ; or Krista Schuelke, [phone], or
[e-mail] , for Texas Instruments Incorporated. Please do not
publish these numbers or email addresses.

URL: http://www.ti.com/GC5016rls_wi
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Copyright (C) 2003 PR Newswire. All rights reserved.

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