GC5016 datasheet(2/88 Pages) TI

2 / 88 page

GC5016

SLWS142G − JANUARY 2003 − REVISED NOVEMBER 2005

www.ti.com

1 DESCRIPTION

The GC5016 is a flexible wideband 4-channel digital up-converter and down-converter. The GC5016 is designed for

high-speed, high bandwidth digital signal processing applications like 3G cellular base transceiver station transmit

and receive channels. The GC5016 is also applicable for general-purpose digital filtering applications. The four

identical processing channels can be independently configured for up-conversion, down-conversion, or a

combination of two up-conversion and two down-conversion channels.

In up-conversion mode, the channel accepts real or complex signals, interpolates them by programmable amounts

ranging from 1 to 4096, and modulates them up to selected center frequencies. The 4 digital up-converter signals

can be output individually, summed together on one or two outputs on a single GC5016, or optionally summed

between multiple GC5016s. Channels can be used in pairs to increase the output sample rate, to increase filtering

capacity, to increase the input bandwidth, or any combination. Each channel contains a user programmable input

filter (PFIR), which can be used to shape the transmitted signal’s spectrum or as a Nyquist transmit filter for shaping

digital data such as QPSK, GMSK, or QAM symbols.

In down-conversion mode, the channel accepts real or complex signals, demodulates them from selected carrier

frequencies, decimates them by programmable amounts ranging from 1 to 4096, applies a gain from a user defined

automatic gain control, and produces 20-bit outputs. The frequencies and phase offsets of the four sine/cosine

sequence generators can be independently specified, as can the decimation and filtering of each circuit. Channels

can be synchronized to support beam forming or frequency hopped systems. The output from the down-conversion

channel is formatted and output in up to four output ports as either real or complex data.

2 ORDERING INFORMATION

PART NAME

TEMPERATURE

PACKAGE

DESCRIPTION

GC5016-PB

−40

°C to 85°C

GDJ (S-PBGA-N252)

252 ball PBGA

GC5016-PBZ

−40

°C to 85°C

ZDJ (S-PBGA-N252)

252 ball lead free PBGA

3 OTHER REFERENCE MATERIALS

The TI Web site has developer toolkit and application notes that provide application specific programming and

configuration information. The CMD5016 configuration program, along with a user specified source and tap

coefficient file, is used to configure the GC5016 registers. The GC5016 register settings are intended to be configured

through the development toolkit software.

NOTE:Names in italics refer to parameter inputs to the cmd5016 software configuration program.

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