RB-2217

GPS Engine Board

onderzoek PDF

Beschrijving

Enhanced ATHEROS GPS Module with ultra high sensitivity and antenna open/short detection/protection

Feature

  • 20 channel Atheros AR1511 positioning engine
  • Ultra high sensitivity to -160 dBm
  • Supports AGPS, WAAS, EGNOS and MSAS
  • Support 2 USART ports
  • Support 5 Hz position update rate capability @ 3D fix
  • Support power saving modes.
  • Support external interrupt pin (wake up) in power saving mode
  • Antenna short/open circuit detection and protection
  • Built-in 29dBm LNA
  • Low power consumption 57mA
  • 14 µA backup current @ 3V
  • Low position/velocity drift in static mode
  • Small form factor 22.4 x 17.0 mm with SMT pads (micro package)
  • RoHS compliant (lead-free)

Block diagram (RB2217 GPS module)

Specificaties

Electrical Characteristics
Chipset AR1511 Atheros GPS chip
General Frequency L1, 1575.42MHz
  Channels, C/A code 16, 1.023 MHz chip rate, 8192 time/frequency search windows
Accuracy Position 2.5 meters CEP
  Time 1 usecond rms (1 PPS)
Acquisition Rate Cold start 35 sec, typical
  Warm start 33 sec, typical
  Hot start 1.3 sec, typical
Sensitivity tracking -160dBm
  Navigation -157dBm
  Cold start -144dBm
Dynamic Condition Altitude 18,000 meters (60,000 Feet) max.
  Velocity 515 meters /sec (1000 Knots) max.
Power Main Power 3.3 VDC typical
  Supply current 57 mA
  Backup power 1.5 ~ 3.6V
  Backup current 14µA @ 3V
Serial Port Electrical interface USART,
  Protocols NMEA, 3GPP,
    5 Hz position update rate capability @3D fix
Environmental Characteristics
Temperature Operating range - 40°C to + 85°C
Mechanical dimensions L x W x H 22.4 x 17.0 x 3.0 mm
Interface I/O connector 28 pin SMD micro package
Antenna
Parameter Specification  
Antenna type Passive and/or active antenna
Active Antenna 15 ~ 25 dB Gain recommended (50dB max.)
1.5 dB noise figure max.
Antenna Supply Using VCC_RF (pin #18) or external voltage source
V_ANT (pin#19)
Antenna Supervisor (see application circuit) Short circuit detection (built-in)
Open circuit detection enabled with external circuit

Application Circuit
Antenna open/short detection/protection circuit

Reflow Profile

Aanbevolen