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