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The GC5018 is a multi-channel communications signal processor that provides digital downconversion optimized for cellular base transceiver systems. The device supports UMTS, CDMA-1X and TD-SCDMAair interface cellular standards.
The chip provides up to 8 UMTS digital downconverter channels (DDC), 16 CDMA DDCs or 16 TD-SCDMA DDCs. The DDC channels are independent and operate simultaneously.
The GC5018 has four 16-bit inputs. Each DDC channel can be programmed to accept data from any one (or two for complex input mode) of the four input ports.
GC5018 Maximum Ratings
UNIT
VDDS Pad ring supply voltage
0.3 V to 3.7 V
DVDD Core supply voltage
0.3 V to 1.8 V
Digital input voltage
0.3 V to VDDS+0.3 V
Clamp current for an input or output
20 mA to +20 mA
TSTG Storage temperature
65°C to 140°C
T J Junction temperature
105°C
Lead soldering temperature (10 seconds)
300°C
Class 2 ESD classification
Class 2 Moisture sensitivity
GC5018 Features
* Four 16-Bit CMOS ADC Input Ports * Programmable Closed Loop VGA Control Wit 6-Bit Outputs for Each ADC Input Port * Provide Received Total Wide Band Power (RTWP) Measurement for the Composite Power Across Carriers With Programmable Time Window for Measurement * 8 UMTS Digital Down Converter (DDC) Channels or 16 CDMA or 16 TD-SCDMA DDC Channels With Programmable 18 Bit Filter Coefficients * Each DDC channel includes Real or Complex DDC Inputs
GC5018 Typical Application
* Wireless Base Station Receiver * Multi-Carrier Digital Receiver * UMTS (4 Carriers-1 Sector With Diversity) * CDMA (8 Carriers-1 Sector With Diversity) * TD-SCDMA (16 Carriers-1 Sector Without Diversity, 8 Carriers-1-Sector With Diversity) * Digital Radio Receivers * Wide Band Receivers * Software Radios * Wireless Local Loop * Intelligent Antenna Systems
115 dB SFDR NCO UMTS Mode Rx Filtering: 6 Stage CIC (m=1 or 2), Up to 40 Tap CFIR, Up to 64 Tap PFIR CDMA Mode Rx Filtering: 6 Stage CIC (m=1 or 2), Up to 64 Tap CFIR, Up to 64 Tap PFIR Power Measurements Final AGC 1.5V Digital Core Supply, 3.3V Digital I/O Supply 305 Ball Plastic BGA (19 mm x 19 mm) With 1,0 mm Pitch Power Dissipation: ~2W