Datasheet


SkyNav GM25

Ultra High Sensitivity and Low Power GPS Receiver Module

General Description

 The SkyNav GM25 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 –158dBm 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
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  • Ultra high sensitivity: -158dBm

  • Extremely fast TTFF at low signal level

  • Built in high gain LNA

  • 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: 25x25x3.0mm

  • RoHS compliant (Lead-free)Performance Specification

Performance Specification

Parameter

Specification

Receiver Type

L1 frequency band, C/A code, 12-channels

Sensitivity

Tracking

Acquisition

-158dBm

-145dBm

Accuracy

 

Position

Velocity

Timing (PPS)

5m CEP without SA

0.1m/s without SA

60ns RMS

Acquisition Time

Cold Start

Warm Start

Hot Start

Re-Acquisition

48s

35s

3s

<1s

Power Consumption

Tracking

Acquisition

Sleep/Standby

40mA @3V Vcc

45mA

TBD

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