LR915X/LR935X/LR955X family of products utilized SiRFstarV ™ and features Quad-GNSS for tracking GPS, GLONASS, BDS and Galileo satellites. The product family delivers highly accurate continuous location, advanced power management and high interference immunity. These continue to push the envelope of performance in sensitivity, TTFF and urban canyon availability and accuracy. With a built-in DSP and extremely low power consumption, the family can get fast location fixes for geo-tagging images or videos, asset tracking and wearable applications.

Performance

• GPS, GLONASS, Galileo, BDS and SBAS reception for high GNSS availability and accuracy

• High sensitivity navigation engine (PVT) tracks as low as

• GPS : -165 dBm

• GLONASS : -159 dBm52 track verification channels

• SBAS (WAAS or EGNOS,MSAS)

• Active Jammer Remover, removes in-band jammers up to 80 dB-Hz

• Tracks up to 8 CW jammers

• Multimode A-GPS (Autonomous, MS-Based, and MS-Assisted), need operator support.

• Embedded CGEE / SGEE (With back-end server support) speed up TTFF a lot and makes cold start time to be around 20+ seconds.

• SiRFGeoRecovTM Reverse EE makes positioning process being done under power saving mode.

• Reacquisition Time : 0.1 second

• RF Metal Shield for best performance in noisy environments

Hardware and Software

• Based on the high performance features of the SiRFstarV™ low power single core logic.

• Adaptive micropower controller

• Only 50 to 500μA maintains hot start capability (core logic)

• < 10mW required for TricklePower™ mode

• RoHS compliant (lead-free)

• Advanced navigation features

• Smart sensor supported by I²C interface

• External interrupt input for context change detection
  
  
  

Advantages

• Built-in LNA.

• Built-in internal ROM and based on Firmware 5.5.X

• It can remove in-band jammer up to 80db-Hz and track up to 8CW jammers, so the module can prevent GPS signal interference when design-in the electrical device with noisy electrical signal interferences such as Laptop, mobile phone, DSC, etc.

• Maintain tracking sensitivity as low as GPS @ -163dBm, GLONASS @ -161dBm, even without network assistance. (SiRFstar III has only -159dBm sensitivity)

• Support SiRFaware™ technology

• Support adaptive"Micro Power Controller"power management mode.

• < 10mW TricklePower™, so user can leave power on all day instead of power off.

• Suitable for battery drive devices that need lower power consumption application

• Ideal for high volume mass production(Taping reel package)

• Cost saving through elimination of RF and board to board digital connectors

• Flexible and cost effective hardware design for different applications

• Embed CGEE (Client Generated Extended Ephemeris) that can capture ephemeris data from satellites locally and predicts ephemeris up to 3 days. So if the module was off within 3 days, it could complete positioning process with limited time just like hot start.

Specification

Feature	Item	Description
Chipset	GSD5e/ROM base	SiRF starV low power single chipset
General	Frequency GPS	L1, 1575.42 MHz
	Frequency GLONASS	L1, 1602~1615 MHz
	C/A code	1.023 MHz chip rate
	Channels	52
	Sensitivity GPS	-165 dB
	Sensitivity GLONASS	-161 dB
Accuracy	Position	<2.5 meters
	Velocity	0.01 meters/second
	Time	1 uS synchronized to GPS time
Datum	Default	WGS-84
	Other	selectable for other Datum
Time to First Fix(TTFF) (Open Sky & Stationary Requirements)	Reacquisition	0.1 sec., average
	Snap start	1 sec., average
	Hot start	1~2 sec.
	Warm start	9~15 sec.
	Cold start	25~35 sec.
DynamicConditions	Altitude	18,000 meters (60,000 feet) max.
	Velocity	515 meters/second (1000 knots) max.
	Acceleration	4g, max.
	Jerk	20 meters/second3, max.
Environmental Specification	Operating temperature range	-40 deg. C to +85 deg. C
	Storage temperature range	-50 deg. C to +95 deg. C
	Humidity	Up to 95% non-condensing or a wet
		Bulb temperature of +35 deg. C
	Jerk	20 meters/second3, max.
Power	Main power input	1.8 VDC input
	Power consumption	Average 60mA (Tracking Mode)
	Backup Power(V_RTC)	1.8 V DC battery input
Serial Port	Electrical interface	Default UART
	Protocol messages	NMEA-0183@9600 bps
Physical Specification	20 x 20 x 7 ± 0.5mm