SIMCom presents a high performance and reliable assisted GPS module-SIM28. It is in a SMT type with MTK mature GPS only navigation engine, which allows you to achieve the industry’s high levels of accuracy and Time-to-First-Fix (TTFF) with lowest power consumption.

Mechanical data

•Dimensions: 16*12.2*2.4mm

•Weight: 1g

Features

•Support EASYTM self-generated orbit prediction

•Support SBAS ranging (WAAS, EGNOS, GAGAN,MSAS)

•Support EPOTM orbit prediction

•Support Jamming removing function

• Low-noise amplifier has been integrated

Interfaces

•Serial interfaces

UART, SPI / I²C 

•Digital I/O

TIMEMARK output

EINT0 input

GPIO

•Protocols 

NMEA

PMTK

Support evaluation products

•SIM28-TE

•SIM28EVB KIT with USB V2.0 full speed interface

Electrical data

•Power supply

+2.8V ~4.3V

•Backup power

+2.3V ~4.3V

• Power consumption2,5

-- Acquisition:24 mA

-- Tracking:19mA

-- Standby mode:<200μA

• Antenna type

Active and Passive

•Antenna power 

External or internal

VCC_RF

Performance data

•Receiver type

22 tracking / 66 acquisitionchannel

GPS receiver

GPS L1, C/A Code 

•Max. update rate

10Hz

•Sensitivity1

Tracking:-165 dBm

Reacquisition:-160 dBm

Cold starts:-147 dBm

•Time-To-First-Fix2

Cold starts with EASY:13s

Warm starts with EASY:1~2s

Cold starts:32s

Cold starts with

EPO Assist:12.5s

Hot starts:<1s

•Accuracy

Automatic Position3:2.5m CEP

Speed4:0.1m/s

Timing:10ns

•Operation temperature: -40℃~+85 ℃

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1.Demonstrated with a good active antenna

2.All SV @ –130 dBm

3.50% 24 hr static, -130dBm

4.50%@ 30m/s

5. @3.3V with a passive antenna