GM-205810-000 DeLorme, GM-205810-000 Datasheet - Page 8

• Manufacturer Part Number: GM-205810-000
• Description: MODULE GPS RCVR GPS2058
• Manufacturer: DeLorme
• Type: GPS Moduler

Specifications of GM-205810-000

• Frequency: 1.575GHz
• Data Rate - Maximum: 57.6 kbps
• Modulation Or Protocol: GPS
• Applications: GPS Receiver
• Current - Receiving: 50mA
• Data Interface: PCB, Surface Mount
• Memory Size: 16kB Flash
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40 Pin
• Processor Used: STA2058
• Operating Voltage: 3.3 V
• Operating Current: 85 mA
• Frequency Range: 1575.42 MHz
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Consumer handheld, PND (portable navigation), in-vehicle navigation/telematics systems
• Other names: GM-205810-000TR

Power Supply Options
The GPS2058 module can be powered by two different methods. The preferred method will depend on the supply voltages
available on the PCB and the power consumption goals of the system.
A single external 3.3V supply can be used to power the entire module. When only the external 3.3V supply is used the voltage
is down converted inside the module to supply the core 1.8V. Using an external 3.3V supply requires 85mA (typical) of total
current for the entire module.
There is power loss associated with the internal regulator. If external 3.3V and 1.8V sources are both available to power the
module the internal regulator can be shut off to eliminate its power loss. The external 3.3V supply is still needed to power the
I/O and some other components in the module requiring 3.3V (i.e.; LNA).
When using the dual 3.3V and 1.8V supply rails approximately 50mA of current comes from the 1.8V rail while about 35mA will
come from the 3.3V supply.
There is a NMEA command to turn off the internal regulator, $PDME,12,2. When the GPS2058 is initially powered on (and not
in STANDBY mode) the $PDME,12,2 command can be issued to power off the internal regulator and reduce the total power
consumption. When a hardware reset occurs the 1.8V regulator is powered on and the $PDME,12,2 command must be re-
issued to bypass the 1.8V regulator.
Note that the GPS2058 will still function properly using two supplies with the internal regulator still ON, providing the V18 never
exceeds 2.0V (abs max).
When an external 1.8V supply is not used the V18 supply pin should be left floating.
In order to fully enter STANDBY mode you should disable the internal 1.8V regulator when using an external 1.8V supply.
Coming out of STANDBY mode will require you to re-issue the command to disable the internal regulator if an external 1.8V
supply is used.
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