CC2510_15 Datasheet, PDF (205/245 Pages) Texas Instruments – Low-Power SoC (System-on-Chip) with MCU, Memory,2.4 GHz RF Transceiver, and USB Controller

CC2511F8 - Not Recommended for New Designs
CC2510Fx / CC2511Fx
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Figure 58:Typical Selectivity at 250 kBaud. IF Frequency is 457 kHz.
MDMCFG2.DEM_DCFILT_OFF=1
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Figure 59: Typical Selectivity at 500 kBaud. IF Frequency is 307.4 kHz.
MDMCFG2.DEM_DCFILT_OFF=0
13.17 System Considerations and Guidelines
13.17.1 SRD Regulations
International regulations and national laws
regulate the use of radio receivers and
transmitters. The most important regulations
for the 2.4 GHz band are EN 300 440 and EN
300 328 (Europe), FCC CFR47 part 15.247
and 15.249 (USA), and ARIB STD-T66
(Japan). A summary of the most important
aspects of these regulations can be found in
AN032 [9].
Please note that compliance with regulations is
dependent on complete system performance.
It is the customer’s responsibility to ensure that
the system complies with regulations.
13.17.2 Frequency Hopping and Multi-
Channel Systems
The 2.400 – 2.4835 GHz band is shared by
many systems both in industrial, office and
home environments. It is therefore
recommended to use frequency hopping
spread spectrum (FHSS) or a multi-channel
protocol because the frequency diversity
makes the system more robust with respect to
interference from other systems operating in
the same frequency band. FHSS also combats
multipath fading.
Charge pump current, VCO current and VCO
capacitance array calibration data is required
for each frequency when implementing
frequency hopping for CC2510Fx/CC2511Fx.
There are 3 ways of obtaining the calibration
data from the chip:
1) Frequency hopping with calibration for each
hop. The PLL calibration time is approximately
735 µs²⁴ and the blanking interval between
each frequency hop is then approximately
24 _{The system clock frequency is equal to fRef.}
Max calibration time is used (TEST0=0x0B
and FSCAL3.CHP_CURR_CAL_EN=10) Please
see DN110 [11] for more details.
SWRS055G
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