7
MTX-StarSensor | 2020/9
MTX © by MATRIX ELECTRONICA S.L.U.
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5. Electrical Features
Vcc =10.8V, TA=25ºC
ULP, Ultra-low
power mode
The device is in hibernation state. All the systems,
except, Tamper circuitry and Real time clock to
wake up at predefined time, remains slept
6.4
uA
Transducer
reading operation
The system is awake with the communications
section disabled. It takes a measurement form
transducer and stores it in memory
84
mA
Transducer
reading and
sending operation
The system is awake. Takes one measure from
transducer and send all the measurements store
in memory
108.5
mA
Energy consumption
Transducer
reading operation
Energy consumed in the reading interval
10.8
mW·h
Transducer
reading and
sending operation
Energy consumed in the reading and sending
interval
22.3
mW·h
6. Estimated Operating Time
The battery power pack provides 10.8V with a capacity of 76Ah which gives a total energy of 760W·h to
the system. If we consider, for example, 24 readings, 1 per hour, and 1 sending operation per day:
23 reading operations x 10.8 mW·h = 248.4 mW·h
1 r 1 sending operation = 22.3 mW·h
Total energy consumption per day = 270.7 mW·h
If the energy of the battery is divided by the energy consumed during the day, it’s obtained the operating
days:
760000 mW·h / 270.7 mW·h = 2807.5 operating days. Converted to years, it would be 7.69 years.
