gp1020-datasheet - Zarlink Semiconductor - #1

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ZARLINK SEMICONDUCTOR FEBRUARY 1994 DS3605-2.2 GP1020 SIX-CHANNEL PARALLEL CORRELATOR CIRCUIT FOR GPS OR GLONASS RECEIVERS The GP1020 is a six-channel CMOS digital correlator which has been designed to work with the GP1010 L1-channel down-converter or other integrated circuits, and may be used to acquire and track the GPS C/A code or the GLONASS signals. For each of the six channels the GP1020 includes independ-ent digital down-conversion to baseband, C/A code generation, correlation, and accumulate-and-dump registers. The GP1020 interfaces with a microprocessor via a 16-bit data bus to control the acquisition and tracking processes using the various registers on the chip. FEATURES ■ Six Fully Independent Correlation Channels ■ Switchable to Receive GPS or GLONASS Codes ■ Input Multiplexer for Multiple GPS Front-Ends - Allows Antenna Diversity ■ Input Multiplexer for GLONASS Multiple (Separate Channels) Front-Ends ■ Digital Interface Compatible with Most 16 or 32-Bit Microprocessors ■ Fully Compatible with GP1010 GPS Receiver Front-End ■ Sideways Stackable to give Multiples of Six Channels ■ 120-pin Plastic Quad Flatpack ■ Power Dissipation Less Than 500mW APPLICATIONS ■ GPS or GLONASS Navigation Systems ■ High Integrity Combined Receivers ■ GPS Geodetic Receivers ■ GPS Time Reference ORDERING INFORMATION The GP1020 is available in 120-pin Quad Flatpacks (Gullwing formed leads) in both Commercial (0°C to +70°C) and Industrial (-40°C to +85°C) grades. The ordering codes below are for standard screened devices. ORDERING CODES GP1020 CG GPKR Commercial - Plastic 120-pin QFP (GP120) GP1020 IG GPKR Industrial - Plastic 120-pin QFP (GP120) 90 61 i 30 GP120 Fig 1 Pin connections - top view ABSOLUTE MAXIMUM RATINGS These are not the operating conditions, but are the absolute limits which if exceeded, even momentarily, may cause perma­nent damage. To ensure sustained correct operation the device should be used within the limits given under Electrical Character-istics. Supply voltage (VDD) from ground (VSS): -0-3V to+6-0 V Input voltage (any input pin): VSS-0-3V to VDD+0-3 V Output voltage (any output pin): VSS-0-3V to VDD+0-3 V Storage temperature: -55°C to +125°C RELATED PRODUCTS Part Description Datasheet Reference DW9255 GP1010 35-42MHz SAW Filter GPS Receiver Front-End DS3861 DS3076