Rf Transmit Section - Texas Instruments CC2500 TK Manual

4.3

RF Transmit Section

Tc = 25C, VDD = 3.0 V, 0 dBm if nothing else stated. All measurement results obtained using the CC2500EM reference
design ([4]).
Parameter Min
Differential load
impedance
Output power,
highest setting
Output power,
lowest setting
Occupied bandwidth
(99%)
Adjacent channel
power (ACP)
Spurious emissions
25 MHz – 1 GHz
47-74, 87.5-118, 174-
230, 470-862 MHz
1800-1900 MHz
At 2∙RF and 3∙RF
Otherwise above 1
GHz
TX latency
Typ Max Unit Condition/Note

80 + j74
Differential impedance as seen from the RF-port (RF_P and
RF_N) towards the antenna. Follow the CC2500EM
reference design ([4]) available from the TI website.
+1 dBm Output power is programmable and full range is available
across the entire frequency band.
Delivered to a 50  single-ended load via CC2500EM
reference design ([4]) RF matching network.
–30 dBm Output power is programmable and full range is available
across the entire frequency band.
Delivered to a 50  single-ended load via CC2500EM
reference design ([4]) RF matching network.
It is possible to program less than -30 dBm output power,
but this is not recommended due to large variation in output
power across operating conditions and processing corners
for these settings.
91 kHz 2.4 kBaud, 38.2 kHz deviation, 2-FSK
117 kHz 10 kBaud, 38.2 kHz deviation, 2-FSK
296 kHz 250 kBaud, MSK
489 kHz 500 kBaud, MSK
-28 dBc 2.4 kBaud, 38.2 kHz deviation, 2-FSK, 250 kHz channel
spacing
-27 dBc 10 kBaud, 38.2 kHz deviation, 2-FSK, 250 kHz channel
spacing
-22 dBc 250 kBaud, MSK, 750 kHz channel spacing
-21 dBc 500 kBaud, MSK, 1 MHz channel spacing
–36 dBm
–54 dBm
–47 dBm Restricted band in Europe
–41 dBm Restricted bands in USA
–30 dBm
8 bit Serial operation. Time from sampling the data on the
transmitter data input pin until it is observed on the RF
output ports.
Table 6: RF Transmit Section
SWRS040C
CC2500
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