Specifications
CC1101
SWRS061I Page 16 of 98
4.3 RF Transmit Section
T
A
= 25C, VDD = 3.0 V, +10 dBm if nothing else stated. All measurement results are obtained using the CC1101EM reference
designs ([1] and [2]).
Parameter
Min
Typ
Max
Unit
Condition/Note
Differential load
impedance
315 MHz
433 MHz
868/915 MHz
122 + j31
116 + j41
86.5 + j43
Differential impedance as seen from the RF-port (RF_P and
RF_N) towards the antenna. Follow the CC1101EM reference
designs ([1] and [2]) available from the TI website
Output power,
highest setting
315 MHz
433 MHz
868 MHz
915 MHz
+10
+10
+12
+11
dBm
dBm
dBm
dBm
Output power is programmable, and full range is available in all
frequency bands. Output power may be restricted by
regulatory limits.
See Design Note DN013 [15] for output power and harmonics
figures when using multi-layer inductors. The output power is
then typically +10 dBm when operating at 868/915 MHz.
Delivered to a 50 single-ended load via CC1101EM
reference designs ([1] and [2]) RF matching network
Output power, lowest
setting
-30
dBm
Output power is programmable, and full range is available in all
frequency bands
Delivered to a 50 single-ended load via CC1101EM
reference designs ([1] and [2]) RF matching network
Harmonics, radiated
2
nd
Harm, 433 MHz
3
rd
Harm, 433 MHz
2
nd
Harm, 868 MHz
3
rd
Harm, 868 MHz
2
nd
Harm, 915 MHz
3
rd
Harm, 915 MHz
-49
-40
-47
-55
-50
-54
dBm
dBm
dBm
dBm
dBm
dBm
Measured on CC1101EM reference designs ([1] and [2]) with
CW, maximum output power
The antennas used during the radiated measurements
(SMAFF-433 from R.W. Badland and Nearson S331 868/915)
play a part in attenuating the harmonics
Note: All harmonics are below -41.2 dBm when operating in
the 902 – 928 MHz band
Harmonics, conducted
315 MHz
433 MHz
868 MHz
2
nd
Harm
other harmonics
915 MHz
2
nd
Harm
other harmonics
< -35
< -53
-43
< -45
-36
< -46
-34
< -50
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
Measured with +10 dBm CW at 315 MHz and 433 MHz
Frequencies below 960 MHz
Frequencies above 960 MHz
Frequencies below 1 GHz
Frequencies above 1 GHz
Measured with +12 dBm CW at 868 MHz
Measured with +11 dBm CW at 915 MHz (requirement is -20
dBc under FCC 15.247)