Sunnyvale, Calif. -- Fujitsu Microelectronics America, Inc.'s newest chipset for the high-sensitivity GPS/AGPS receivers is capable of operating in both "autonomous GPS/standalone" mode and "assisted GPS" mode. The company is targeting communications systems that support telematics and navigation applications for mobile location, tracking and monitoring.
The chipset consists of a baseband chip, the MB87Q2040, which interfaces to a host CPU/MCU via an UART serial interface; and an RF front-end chip, the MB15H156, which supports GPS L-band C/A code. The units support UMTS/WCDMA, GSM/GPRS, PDC and CDMA. The MB87Q2040 incorporates highly optimized GPS/AGPS baseband IP that has been licensed from eRide Inc., based in San Francisco.
Using power-saving techniques with the 0.11um technology results in a peak baseband power dissipation of only 67mW during low signal strength acquisition, while power dissipation is less than 40mW while continuous tracking is at a 1Hz update rate.
The acquisition/tracking engine on the chip has 44,000 effective correlators, resulting in high indoor sensitivity calibrated to -157.5dBm, with indoor accuracy of less than 20m. The chipset meets FCC-E911 requirements for October 2005, and achieves fast TTFF of less than 1 second when hot and around 32 seconds when cold for outdoor fixes.
The MB15H156 RF front-end chip is built using Fujitsu's BiCMOS process, which integrates most RF-externals, and features on-chip IF-filters, VCO, PLL, oscillators and LNA. The result is a low BOM cost and component count that also minimizes board area.
Fujitsu provides a software library (API) for interfacing to the application software layer. The control software on the host CPU is processor- and OS-independent, running as a single thread requiring no real-time interrupts, RTOS or host libraries.
The MB87Q2040 and MB15H156 samples are now available in 7x7mm 48-pin and 5x5mm 32-pin BCC plastic packages, respectively, with pin pitch at 0.5mm, delivering a total footprint of below 100mm2. The chipset operates over the industrial temperature range of -40 to +85oC. The price per chipset is $15 in 100,000-unit quantities.
For product information, visit www.fma.fujitsu.com/gps