CC1070_12 Datasheet, PDF (7/57 Pages) Texas Instruments – Single Chip Low Power RF Transmitter for Narrowband Systems

CC1070
Parameter
Modulation bandwidth, 868 MHz
19.2 kBaud, ±9.9 kHz frequency
deviation
38.4 kBaud, ±19.8 kHz frequency
deviation
Spurious emission, radiated CW
47-74, 87.5-118,
174-230, 470-862 MHz
9 kHz – 1 GHz
1 – 4 GHz
Optimum load impedance
433 MHz
868 MHz
915 MHz
Min. Typ. Max. Unit
Condition / Note
Bandwidth where the power
48
kHz envelope of modulation equals
–36 dBm. Spectrum analyzer
RBW = 1 kHz.
106
kHz
At maximum output power,
+10/+8 dBm at 433/868 MHz.
-54
dBm To comply with EN 300 220,
FCC CFR47 part 15 and ARIB
-36
dBm STD T-67 an external (antenna)
filter, as implemented in the
-30
dBm application circuit in Figure 14,
must be used and tailored to
each individual design to reduce
out-of-band spurious emission
levels.
Spurious emissions can be
measured as EIRP values
according to EN 300 220. The
antenna (SMAFF-433 and
SMAFF-868 from R.W. Badland)
plays a part in attenuating the
spurious emissions.
If the output power is increased
using an external PA, a filter must
be used to attenuate spurs below
862 MHz when operating in the
868 MHz frequency band in
Europe. Application Note AN036
CC1020/1021 Spurious Emission
presents and discusses a solution
that reduces the TX mode
spurious emission close to 862
MHz by increasing the REF_DIV
from 1 to 7.
91 + j16
34 + j25
28 + j21
Transmit mode. For matching
Ω details see section 13 on page
Ω ^26.
Ω
Table 3. RF transmit parameters
SWRS043A
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