Specifications

The following tables document the nominal recommended operation conditions.

Refer to Interface Specifications for more details about onboard and mating connectors.

Power Supply

ItemConditionsMin.Typ.MaxUnit

Input Voltage Range

-

9

28

36

V

Typical Power Consumption

Over full Input Voltage Range with GNSS Antennas

-

3.5

5

W

Inrush Current Consumption




800

mA

Under-Voltage Lockout ThresholdRising
8.75
V
Falling
6.2
V

Note: Power supply and cable length

The Stellar 40 power supply specification is valid at connector level. Necessary margins have been taken to allow operate at 9.0V power supply using up to a 2.0m long AWG28 cable, as provided in the recommended accessories.

In case a longer cable is required, consider using either a higher power supply wire gauge, or increase power supply input voltage to mitigate cable losses, and make sure the under-voltage thresholds are met.

I/O Interfaces

ItemConditionsMin.Typ.MaxUnit

Sync In (all)

Input Range

-

-15


+15

V

Low Level Threshold

-

0.6

1.2


V

High Level Threshold

-


1.5

2.4

V

Input Resistance

-

3

5

7

kΩ

Sync Out A (RS-232)

Low Level Output Voltage

RL=3kΩ

-5

-5.5


V

High Level Output Voltage

RL=3kΩ

5

5.5


V

Output Short Circuit Current

-


±30

±60

mA

Sync Out B (LVTTL)
Low Level Output VoltageIL=100μA3.2

V
IL=16mA2.4

High Level Output VoltageIL=100μA

0.1V
IL=16mA

0.4

RS-232 Interfaces

ItemConditionsMin.Typ.MaxUnit

Receivers

Input Range

-

-15


+15

V

Low Level Threshold

-

0.6

1.2


V

High Level Threshold

-


1.5

2

V

Input Resistance

-

3

5

7

kΩ

Transmitters

Low Level Output Voltage

RL=3kΩ

-5

-5.5


V

High Level Output Voltage

RL=3kΩ

5

5.5


V

Output Short Circuit Current

-


±30

±60

mA

RS-422 Interfaces

ItemConditionsMin.Typ.MaxUnit

Receivers

Input Differential Threshold

-7V<VCM<+12V

-200

-125

-50

mV

Input Hysteresis

-


25


mV

Input Resistance

-

100

120

155

Ω

Transmitters

Differential Output Voltage


RL=100Ω

2


3.3

V

Common Mode Output Voltage

RL=100Ω



3

V

CAN Interface

ItemConditionsMin.Typ.MaxUnit
Receiver
Bus Common Mode Voltage -

±25V
Bus Input Differential Threshold VoltagePositive-Going
775900mV

Negative-Going

500625
mV

Bus Input Differential Hysteresis Voltage



150
mV
Transmitter

Recessive Bus Output Voltage

No Load

1.45

1.95

2.45

V

CAN H Dominant Bus Output Voltage


2.15

2.9

3.3

V

CAN L Dominant Bus Output Voltage


0.5

0.9

1.65

V

Ethernet

ItemConditionsMin.Typ.MaxUnit

100BASE-TX Transmitter

Peak Differential Output Voltage

100Ω termination across differential output

0.95


1.05

V

Output Voltage Imbalance

100Ω termination across differential output



2

%

10BASE-T Transmitter

Peak Differential Output Voltage

100Ω termination across differential output

2.2


2.8

V

10BASE-T Receiver

Squelch Threshold

5 MHz square wave


400


mV


GNSS Antenna Port Electrical Specifications

ParametersConditionsMin.Typ.MaxUnit

Output Current Limit

Sum of ANT1 and ANT2 current



150

mA

Output Voltage

-


5.0


V

GNSS Antenna Requirements

ParametersRequirements
TypeActive, featuring embedded LNA ( Low Noise Amplifier )
Gain Range15 - 50 dB

Important note: Dual-antenna users only

As a rule of thumb, the GNSS receiver expects a similar antenna type and similar cable length to provide optimal performance. This scenario enables a similar pre-amplification gain on the primary and auxiliary antennas.
Using different cable lengths (exceeding 6m) or different antenna types may require additional care. Indeed, a signal asymmetry higher than 5 dB shall be excluded to avoid internal channels cross-talk

In applications with limited asymmetry (<5dB), it's recommended to route the strongest signal on the primary antenna and the weakest on the secondary antenna.
If the signal power difference exceeds 5 dB, using an external RF attenuator should be used to attenuate the strongest signal.

Electrical Absolute Maximum Rating

Important note

Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ItemRatingUnit

RS-232/RS-422/SYNC-IN/SYNC_OUT(RS232) to Signal Ground

±18

V

Ethernet to Signal Ground–0.5V to +5.0V
SYNC_OUT(TTL) to Signal Ground–0.5 to +3.8V
CAN to Signal Ground±60V
VIN+ to VIN-±40V
VIN- to Mechanical Ground±40V
Signal Ground to Mechanical Ground±40V

ESD Circuit protection for all pins

30

kV

ESD Circuit protection for GNSS Antenna ports

15

kV

Maximum RF Power Input for GNSS Antenna ports

10

dBm