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ST150M User Manual
Confidential & Proprietary Information
9150-0125-01 R-1
6. RECOMMENDED OPERATING CONDITIONS
6.1 ABSOLUTE MAXIMUMS
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.
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
SYMBOL
PARAMETER
MAX
UNITS
V33_IN
Input Voltage Range for Digital Inputs
3.6
Volts
I33_IN
Input Current for Digital Inputs
100
mA
VRF_IN
Input Voltage Range for RF circuitry
3.6
Volts
IRF_IN
Input Current for RF Circuitry
500
mA
VUSB
Input Voltage Range for USB Device
5.25
Volts
PRF_IN_GPS
Input Power for GPS Receiver
0
dBm
PRF_IN_BLE
Input Power for Bluetooth Transceiver
+10
dBm
PRF_OUT_
BLE
Output Power for Bluetooth Transceiver
+8
dBm
PRF_OUT_TX
Output Power for Satellite Transmitter
+24
dBm
TA
Operating Ambient Temperature Range
85
°C
TS
Storage Temperature Range
85
°C
Isolation between PRF_OUT_TX and PRF_IN_GPS
25
dB