User Guide

HE910 Hardware User Guide
1vv0300925 Rev.18 – 15-06-2012
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The HE910 module is integrating a GPS receiver that could be used in Standalone mode and in A-GPS
(assisted GPS).
With the help of advanced digital signal processing algorithms and the use of A-GPS data, the receiver
is capable to achieve sensitivity values of better than -165 dBm as is required for indoor applications.
The following table is listing the HE910 variants that support the GPS receiver:
Product
GPS Receiver
HE910
YES
HE910-D
NO
HE910-GA
YES
HE910-EUR
NO
HE910-EUD
NO
HE910-EUG
YES
HE910-NAR
NO
HE910-NAD
NO
HE910-NAG
YES
Advanced real time hardware correlation engine for enhanced sensitivity (better than -165 dBm for
A-GPS).
Fast Acquisition giving rapid Time-to-First-Fix (TTFF)
Capability to monitor up to 28 channels
Stand Alone and Assisted mode
Integrated LNA
The following Table is listing the main characteristics:
Characteristic
Typical Values
GPS RX Sensitivity
-164dBm
GPS Cold Start Autonomous
-147dBm
GPS Hot Start Autonomous
-161dBm
GPS tracking mode
-166 dBm
GPS Accuracy
3m
TTFF from Cold Start
42 sec
TTF from Warm Start
30sec
TTF from Hot Start
1.8 sec
Power Consumption in Acquisition
46.4 mA @3.8V
Power Consumption in Tracking
37.8 mA @3.8V
Power Consumption in Low Power Tracking
25.7 mA @3.8V