SIM28M
SIMCom presents a small, high performance and reliable assisted GPS module-SIM28M. This is a standalone L1 frequency GPS module in a SMT type and it is designed with MTK high sensitivity navigation engine, which allows you to achieves the industry’s highest levels of sensitivity, accuracy, and Time-to-First-Fix (TTFF) with lowest power consumption.

Mechanical data
• Dimensions: 10.1*9.7*2.5mm
• Weight: 0.5g
 
Features
• Support EASYTM self-generated orbit prediction
• Support EPOTM orbit prediction
• Support AGPS
• Support SBAS ranging (WAAS, EGNOS, GAGAN, MSAS)
• Support Jamming removing function
• Low-noise amplifier has been integrated
 
Interfaces
• Serial interfaces
- UART
• Digital I/O
- TIMEMARK(PPS) 
- GPIO 
• Protocols
- NMEA
- PMTK
- PSIM 
 
Support evaluation products
• SIM68 EVB KIT with USB V2.0 full speed interface
 
Electrical data
• Power supply: +2.8V ~4.3V
• Backup power: +2.0V ~4.3V
• Power consumption2,5
- Acquisition: 17mA
- Tracking: 16mA
- Backup: 8μA
• Antenna type: Active and Passive
• Antenna power: External or internal

Performance data
• Receiver type
           22 tracking / 66 acquisition- channel GPS receiver
           GPS L1, C/A Code
• Max.update rate: 10Hz
• Sensitivity1
- Tracking: -165 dBm
- Reacquisition: -160 dBm
- Cold starts: -148 dBm 
• Time-To-First-Fix2
- Cold starts: 32s
- Warm starts: 30s 
- Hot starts: <1s
- EPO Assist: 13s (CTTFF) 
• Accuracy
- Automatic Position3: 2.5m CEP
- Speed4: 0.1m/s 
- Timing: 10ns 
• Operation temperature: -40℃~+85 ℃
 
Certificate
•  CE