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当前位置:资讯中心电子产品常识了解》GPS信号处理之 SIRF 3代芯片参数

Product Features
◆ Build on high performance, low-power SiRF star III chipset
◆ Extreme fast TTFF (the time to first fix) at low signal level
◆ 20 –channel GPS receiver
◆ SBAS (WAAS, EGNOS Euro Geostationary Navigation Overlay Service) support
◆ Full navigation accuracy provided by Standard Positioning Service (SPS)
◆ Reception frequency 1575.42MHz
◆ CPU (ARM7TDMI) with 4Mb of internally packaged Flash memory
◆ Advanced Power Management. (The mode of low power management when signal levels are less   than 30dB Hz. Update rates are limited from 10 seconds to 255 seconds.)
◆ 2 UARTS, high speed serial bus
◆ Support standard NMEA 0183 protocol(Version. 3.0 GGA, GSA, GSV, RMC, VTG)
◆ Internal RTC (Real Time Clock)
◆ Build-in +3~+3.3V DC converter
◆ Compact Engine Board Size 25 x 25 x 3.3mm (LxWxH) without patch antenna
◆ Can use for GM611, GB621, SP611 and so on. 25 x 25 x 3.2 mm [W x L x H] w/o patch antenna

◆ Performance

  Acquisition time ( Open Sky and Stationary)
  Reacquisition Average 0.1 seconds
  Hot start < Average 01 seconds
  Warm start < Average 38 seconds
  Cold start < Average 42 seconds
  Accuracy
  Position 10 meters RMS without SA
  Velocity 0.1 meters/second, without SA
  Time 1 microsecond synchronized to GPS time
  Datum WGS-84 (or by demand)

  Sensitivity

  Tracking sensitivity -159dBm

  Dynamics
  Altitude < 18000 meter maximum
  Velocity < 515 meter/second maximum
  Acceleration < 4g

  Frequency L1, 1575.42 MHz C/A code

◆ Power

  Power consumption under 75mA fully active
  Power Management Advanced Power Management. (The mode of low power        management when signal levels are less than 30dB Hz. Update rates are      limited from 10 seconds to 255 seconds.)

◆ Interface

  Baud rate Default baud rate for SSIII NMEA is 4800 & 38400 baud.
  The default serial port settings for SiRF binary mode is 57600, N, 8, 1.
  Serial I/O port 2 UARTS, high speed serial bus
  I/O Protocol NMEA 0183 (default)
  I/O Connector 24 pin SMD type
  RF Connector SMD PAD for Patch Antenna

◆ Physical Characteristics

  Dimensions 25 x 25 x 3.3 mm [W x L x H] w/o patch antenna
  Weight 2g
  Vibration 4G Max.

◆ Environment Conditions

  Operating Temperature -40℃ to +85℃
  Storage Temperature -40℃ to +85℃
  Operating Humidity 5% ~ 95% RH, Non condensing

 

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