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9150-0125-01 R-1
6. RECOMMENDED OPERATING CONDITIONS
6.1 ABSOLUTE MAXIMUMS
SYMBOL
V33_IN
I33_IN
VRF_IN
IRF_IN
VUSB
PRF_IN_GPS
PRF_IN_BLE
PRF_OUT_
BLE
PRF_OUT_TX
TA
TS
6.2 HANDLING OF ELECTROSTATIC
SENSITIVE DEVICES
Some components on the ST150M PCB are sensitive to
electrostatic discharge (ESD). The following general guidelines
can help reduce damage due to ESD.
1. Use a grounding bracelet if possible, to minimize charge
build-up on personnel.
2. Handle the ST150M PCB by the edges without touching
components or printed circuit paths.
3. Store the ST150M PCB in static sensitive packaging
whenever possible.
NOTE: Failure to adhere to ESD guidelines will void the
product warranty.
6.3 WIRING
Proper installation and field wiring practices are important to
follow. Users and installers should familiarize themselves with
the requirements of all applicable codes, laws, and standards.
6.4 NOISE SOURCES
Electrical noise is an important consideration in any
installation of the ST150M. When possible, sufficient physical
separation should be maintained between electrical noise
sources and the ST150M.
ST150M User Manual
PARAMETER
Input Voltage Range for Digital Inputs
Input Current for Digital Inputs
Input Voltage Range for RF circuitry
Input Current for RF Circuitry
Input Voltage Range for USB Device
Input Power for GPS Receiver
Input Power for Bluetooth Transceiver
Output Power for Bluetooth Transceiver
Output Power for Satellite Transmitter
Operating Ambient Temperature Range
Storage Temperature Range
Isolation between PRF_OUT_TX and PRF_IN_GPS
Confidential & Proprietary Information
MAX
3.6
100
3.6
500
5.25
0
+10
+8
+24
85
85
25
6.5 NORDIC PROCESSOR UNUSED PINS
Due to its sensitivity to IR light, the Nordic processor is
covered with opaque, light-blocking epoxy.
Tests have shown that if unused pins on the Nordic processor
are set as input without internal pulldowns enabled, the epoxy
will cause higher current draw in low power mode.
It is strongly advised to not leave unused Nordic pins at high
impedance (input without internal pulldown).
6.6 OBSTRUCTIONS
For best performance the ST150M should have an
unobstructed view of the sky, either outdoors or in a glass-
enclosed area such as a vehicle dashboard.
6.7 POWER PERFORMANCE
CHARACTERISTICS
UNITS
Volts
mA
Volts
mA
Volts
dBm
dBm
dBm
dBm
°C
°C
dB
27
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