GEM1111

GEM1111 - 1616A00

GEM1111

GEM1111 is a high-performance L1 GNSS positioning module with antenna built-in, which is developed on the base of the state-of-the-art Allystar Cynosure III Lite architecture.
It supports global civil navigation systems, including GPS, BDS, GLONASS, Galileo, and QZSS. Featured with SAW and LNA, GEM1111 achieves high positioning accuracy and short TTFF, especially in a rough urban environment.
It supports antenna supervisor and auto-switching between the built-in antenna and the external antenna. With a compact body and high performance, GEM1111 is widely applied to tracking applications, like automotive, consumer, and industrial tracking.

Feature

• Supports GPS, BDS, Galileo, GLONASS, and QZSS systems Built-in LNA & SAW for better sensitivity
• Supports A-GNSS
• Supports geo-fence function
• Ultra-low power consumption around 13 mA in tracking mode
• Supports antenna supervision
• Supports auto-switching between the built-in antenna and the external antenna

Specifications

Parameters	Specification
GNSS tracking channels	72 channels, GPS/QZSS: L1C/A Galileo: E1 GLONASS: L1
Updating rate	1 Hz (Default), up to 5 Hz
Position accuracy	< 1.5 m CEP @ Open Sky
Velocity accuracy	0.1 m/s CEP
Time accuracy	1PPS 20ns
Time to First Fix(TTFF)	Hot start 1S Cold star 28S
Sensitivity	Cold start -149 dBm Reacquisition -159dBm Tracking -163dBm
Power supply	2.0-3.63 V, Typical 3.3 V
Power consumption	Acquisition 15mA @3.3V Tracking 13mA @3.3V Standby mode 10uA
Serial Interface	UART Default: 115200 bps
Protocol	NMEA 0183 Protocol Ver.3.01/4.00 (Default)/4.10
Operating temperature	-40~+85℃
Storage temperature	-40~+85℃
Weight	7.5g
Dimessions	16*16*6.9mm

Pin assignment