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-SCDMA air 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.
Four 16-Bit CMOS ADC Input Ports
Programmable Closed Loop VGA Control With
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
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 × 19 mm) With 1.0 mm Pitch
