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Product description

Product Description The JF2 offers developers and integrators the smallest, completely integrated GNSS solution for positioning applications based on a 1.8 V supply. It is fully interoperable with Telit cellular modules for a ready-to-use solution bundle with no additional integration effort or cost. The JF2 can be managed by an external microcontroller or by any of the Telit cellular modules.

Key features
• Based on the SiRFstarIV™core
• GNSS supported: GPS L1
• 11 x 11 x 2.6 mm QFN package
• Flash, EEPROM or ROM based versions
• Assisted GPS
• High RF sensitivity with jamming detection and removal
• Supply voltage range: 1.79 - 1.9 VDC
• Advanced power modes
• Ports: 1PPS, UART, I2C and SPI

Key Benefits
• Supports AGPS using Extended Ephemeris injection as well as Extended Ephemeris on-board generation for fastest TTFF
• Easy integration in cellular/GNSS bundle solutions with Telit cellular modules
• GPS solution with embedded Flash: high performance, always up-to-date and lowest BOM cost and footprint

Technical specifications

Product features

• Standards: NMEA and OSP
• 48 Channel GPS architecture
• Positional Accuracy (CEP50): Autonomous Positional Error ‹ 2.5 m
• Accuracy
- Speed: ‹ 0.01 m/s
- Heading: ‹ 0.01 deg
• Time To First Fix (90% @ -130 dBm)
- Hot Start: 1 s
- Cold Start: ‹ 35 s
• A-GPS: local ephemeris prediction
• A-GPS: server predicted ephemeris file injection


• Dimensions: 11 x 11 x 2.6 mm
• Weight: 1 g
• 32-pad QFN package, requiring only 2 layer PCB
• Temperature Range
- Operating temperature: -40 to +85°C
- Storage temperature: -40 to +85°C


• UART, SPI, I2C interfaces
• PPS for precise timing
• EGNOS, WAAS, GAGAN and MSAS capability embedded with correction of positional errors due to ionospheric and orbital disturbances
• RTC for efficient power management

Electrical & Sensitivity

• Current consumption
- Hibernate Mode current: 14 uA
- Low power mode (Tracking 1Hz): 10 mA
- Full power Tracking: 37 mA
• Power supply
- Range from 1.75 up to1.9 V
• Sensitivity
- Acquisition: -147 dBm
- Navigation: -160 dBm
- Tracking: -163 dBm

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