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CompactPCI/Serial/PlusIO

VMEbus

Computer-On-Modules (COM)

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SA25 - GPS SA-Adapter™

Overview
Technical Data
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Diagram

Main Features

48-channel GPS receiver
GPS according to NMEA 0183
L1 frequency, C/A code, SPS
Rugged SMA connector
Optical isolation
-40 to +85°C qualified

Description Open

The SA25 provides a GPS receiver interface which supports L1 frequency, C/A code and SPS. An external active or passive antenna can be connected to a rugged SMA connector at the front panel. The received GPS signals are sent to the host via a 5V TTL COM port with a data transfer rate of 4800 baud (configurable).

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Technical Data Open

GPS Interface

48-channel GPS (Global Positioning System) receiver based on SiRF® IV

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GPS Band/Code: L1 frequency, C/A code, SPS

Integrated TCXO, RTC

Accuracy (unaided):
• Position: 2.5 m (CEP50)
• Velocity: 0.01 m/s (50%)
• Time: 1 µs (typ.)

Time To First Fix (TTFF):
• Cold start: 35 s typ.
• Warm start: 35 s typ.
• Hot start: 1 s typ.

Sensitivity:
• Acquisition (cold): -147 dBm
• Re-Acquisition: -162 dBm
• Tracking: -163 dBm

Protocol: NMEA 0183 (configurable to SiRF® binary OSP)

One SMA antenna connector at front panel
• For the use of an external active or passive antenna
• Rugged screw connection
• Outside thread
• Inner conductor female

Host Interface

5 V TTL COM port
• Data transfer rate configurable (default: 4800 baud 8N1)
• Time Mark (TM) output signal provides pulse-per-second (PPS) output pulse signal for timing purposes

Installation

As a piggy-back board directly on a carrier board

Via ribbon cable

Electrical Specifications

Isolation voltage:
• Optical isolation: 2.5 kVAC between isolated side and digital side

Supply voltage/power consumption:
• +5 V (-3%/+5%), 120 mA without antenna, 190 mA with antenna (depends on used antenna)
• Max. supported power consumption for active antenna: +5 V / 70 mA
• Impedance: 50 Ohm

Mechanical Specifications

Dimensions: 32 mm x 42 mm

Weight: 20 g

Environmental Specifications

Temperature range (operation):
• -40..+85°C (qualified)
• Airflow: min. 1 m/s

Temperature range (storage): -40..+85°C

Relative humidity (operation): max. 95% non-condensing

Relative humidity (storage): max. 95% non-condensing

Altitude: -300 m to +3000 m

Shock: 15 g, 11 ms

Bump: 10 g, 16 ms

Vibration (sinusoidal): 1 g, 10..150 Hz

Conformal coating on request

MTBF

826 041 h @ 40°C according to IEC/TR 62380 (RDF 2000)

Safety

PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers

EMC Conformity

EN 50121-3-2 (table 4, 5, 6) (EMC in rolling stock)

EN 55011 (radio disturbance)

EN 61000-4-2 (ESD)

EN 61000-4-3 (electromagnetic field immunity)

EN 61000-4-4 (burst)

EN 61000-4-5 (surge)

EN 61000-4-6 (immunity to conducted disturbances)

Options

Front Connector

One U.FL antenna connector instead of SMA

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Standard Configurations

Article No.	Antenna Connector
08SA25-00	SMA

Standard SA25 Models

Article No.	Description	More
You can find a more detailed overview of possible carrier board/SA-Adapter™ combinations along with software support in our option matrix (PDF).
08SA25-00	GPS receiver, isolated, -40..+85°C screened	Photo

Documentation

Article No.	Description	More
08SA25-DS	SA25 Data Sheet (PDF)	Download
20SA25-00	SA25 User Manual (PDF)	Download