GNSS PLATFORMS

SiRFstarIII GSD3tw
High Performance, Satellite Signal Processor, Host Coupled Single Die

TECHNICAL SPECIFICATIONS

Horizontal Position Accuracy ¹       
       • Autonomous <2.5 m
Velocity Accuracy ²   
       • Speed <0.01 m/s
       • Heading <0.01°
Time To First Fix ³
       • Hot start - Autonomous <1 s
       • Warm start - Autonomous <36 s
       • Cold start - Autonomous <36 s
       • MS Based - GSM coarse time <0.6 s
       • MS Assisted - GSM coarse time <5.3 s
Sensitivity ⁴
       • Autonomous acquisition -147 dBm
       • GSM / UMTS coarse time aided -155 dBm
       • CDMA precise time aided -155 dBm
       • Tracking -159 dBm
Receiver
       • Tracking L1, CA Code
       • Channels up to 20
       • Max update rate 1 Hz
       • Max altitude/velocity <60,000 ft/<1,000 knots
       • Protocol support SSIII sat. signal processing
System Integration 
       • I/O Interface UART and SPI
       • External reference clock 16.369, 16.8, 26, 38.4 MHz
       • RTC input 32.768 kHz
Power ⁵
       • Continuous tracking (1 Hz) 50 mW
       • TricklePower (1 Hz) 20 mW
       • Energy per fix 40 mW-s
       • Standby current 13µA
Host CPU Requirements
       • Typical processing load 5-7 MIPS
Size
       • Package dimensions 3.12 x 3.17 x 0.4 mm
       • Typical design footprint 30 mm2

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