CC1101
SWRS061H Page 18 of 98
4.4 Crystal Oscillator
T
A
= 25C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1101EM reference designs ([1]
and [2]).
Table 13: Crystal Oscillator Parameters
4.5 Low Power RC Oscillator
T
A
= 25C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1101EM reference designs ([1]
and [2]).
Table 14: RC Oscillator Parameters
For compliance with modulation bandwidth requirements under
EN 300 220 in the 863 to 870 MHz frequency range it is
recommended to use a 26 MHz crystal for frequencies below
869 MHz and a 27 MHz crystal for frequencies above 869 MHz.
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.
Simulated over operating conditions
This parameter is to a large degree crystal dependent. Measured
on the CC1101EM reference designs ([1] and [2]) using crystal
AT-41CD2 from NDK
Calibrated RC Oscillator frequency is XTAL
frequency divided by 750
Frequency accuracy after
calibration
Frequency drift when temperature changes after
calibration
Supply voltage coefficient
Frequency drift when supply voltage changes after
calibration
When the RC Oscillator is enabled, calibration is
continuously done in the background as long as
the crystal oscillator is running
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