CC2500_06 Datasheet, PDF (10/84 Pages) Texas Instruments – Single Chip Low Cost Low Power RF Transceiver

CC2500
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.
Parameter
Differential load
impedance
Output power,
highest setting
Output power,
lowest setting
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
Min Typ Max Unit Condition/Note
80 + j74
Ω Differential impedance as seen from the RF-port (RF_P and
RF_N) towards the antenna. Follow the CC2500EM
reference design available from the TI and Chipcon
websites.
0
dBm Output power is programmable and is available across the
entire frequency band.
Delivered to a 50 Ω single-ended load via CC2500EM
reference design RF matching network.
–30
dBm Output power is programmable and is available across the
entire frequency band.
Delivered to a 50 Ω single-ended load via CC2500EM
reference design RF matching network.
–36 dBm
–54 dBm
–47 dBm Restricted band in Europe
–41 dBm Restricted bands in USA
–30 dBm
Table 6: RF transmit parameters
4.4 Crystal Oscillator
Tc = 25°C, VDD = 3.0 V if nothing else stated.
Parameter
Crystal frequency
Tolerance
ESR
Start-up time
Min Typ Max Unit Condition/Note
26 26 27 MHz
±40
ppm This is the total tolerance including a) initial tolerance, b) crystal
loading, c) aging and d) temperature dependence.
The acceptable crystal tolerance depends on RF frequency and
channel spacing / bandwidth.
100 Ω
300
µs Measured on CC2500EM reference design.
Table 7: Crystal oscillator parameters
PRELIMINARY Data Sheet (Rev.1.2) SWRS040A
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