General Description

The SkyNav GM20 is a complete GPS engine module that features super sensitivity, ultra low power and small form factor. The GPS signal is applied to the antenna input of module, and a complete serial data message with position, velocity and time information is presented at the serial interface with NMEA protocol or custom protocol.

Its –159dBm tracking sensitivity extends positioning coverage into place like urban canyons and dense foliage environment where the GPS was not possible before. The small form factor and low power consumption make the module easy to integrate into portable device like PNDs, mobile phones, cameras and vehicle navigation systems.

Features

Ultra high sensitivity: -159dBm
Extremely fast TTFF (Time To First Fix) at low signal level
Low power consumption: Max 45mA@3.0V
NMEA-0183 compliant protocol or custom protocol
Operating voltage: 2.85V to 3.3V
Operating temperature range: -40 to 85℃
SMD type with stamp holes
Small form factor: 25x20x3.0mm
RoHS compliant (Lead-free)

Performance Specification

Parameter	Specification
Receiver Type	L1 frequency band, C/A code, 12-channels
Sensitivity	Tracking Acquisition	-159dBm -145dBm
Accuracy	Position Velocity Timing (PPS)	10m 2D RMS without SA 0.1m/s without SA 60ns RMS
Acquisition Time	Cold Start Warm Start Hot Start Re-Acquisition	48s 35s 8s <1s
Power Consumption	Tracking Acquisition Sleep/Standby	40mA @3V Vcc 45mA 1mA
Navigation Data Update Rate	1Hz
Operational Limits	Altitude Velocity Acceleration	Max 18,000m Max 515m/s Less than 4g

Applications

LBS (Location Based Service)
PND (Portable Navigation Device)
Vehicle navigation system
Mobile phone