Specifications
SLWS142J − JANUARY 2003 − REVISED AUGUST 2007
www.ti.com
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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.