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Typical Operating Conditions
Supply voltage during radio operation (Vreg on)
Operating free air temperature
RF frequency range
Transmit bit rate
Nominal output power
Programmable output power range
Receiver sensitivity
Current consumption: Radio transmitting at 0 dBm
Current consumption: Radio receiving
Current consumption: Radio on, Oscillator on
Current consumption: Idle mode, Oscillator off
Current consumption: Power Down mode, Vreg off
Voltage regulator current draw
Radio oscillator startup time
Measured Output Power
The RF output power of the Telos module from the CC2420 radio is shown in Figure 9. For this
test, the Telos module is transmitting at 2.405GHz (IEEE 802.15.4 channel 11) using the O-
QPSK modulation with DSSS. The CC2420 programmed output power is set to 0 dBm. The
measured output power of the entire modulated spectrum is 2.4 dBm.
0
−5
−10
−15
−20
−25
−30
−35
−40
−45
−50
2.4
Figure 9 : Measured RF output power over the modulated spectrum from the Telos module
Moteiv Corporation
2.401
2.402
2.403
2.404
Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004)
Rev B (Low Power Wireless Sensor Module)
MIN
2.1
-40
2400
250
-3
-90
13
2.405
2.406
2.407
Frequency (GHz)
Telos
NOM
MAX
UNIT
3.6
o
85
2483.5
MHz
250
kbps
0
dBm
40
dBm
-94
dBm
17.4
mA
19.7
mA
365
µΑ
20
µΑ
1
µΑ
20
29
µΑ
580
860
µs
RWB: 100 kHz
VWB: 100 kHz
Sweep: 50ms
2.408
2.409
2.41
V
C
Page 14 of 28
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