CC2510Fx / CC2511Fx
6.7 High Speed RC Oscillator
TA = 25°C, VDD = 3.0 V if nothing else is stated.
Parameter
Min
Typ
13
Max
Unit
MHz
%
Condition/Note
Calibrated frequency2
12
13.5
Calibrated HS RCOSC frequency is fXOSC / 2
Uncalibrated frequency
accuracy
±15
Calibrated frequency
accuracy
%
±1
Start-up time
10
µs
Temperature coefficient
−325
Frequency drift when temperature changes after
calibration
ppm/°C
Supply voltage
coefficient
28
ppm/V
µs
Frequency drift when supply voltage changes after
calibration
Calibration time
65
The HS RCOSC will be calibrated once when the high
speed crystal oscillator is selected as system clock
source (CLKCON.OSCis set to 0), and also when the
system wakes up from PM{1 - 3} if CLKCON.OSCwas
set to 0 when entering PM{1 - 3}. See 12.1.5.1 for
details).
Table 15: High Speed RC Oscillator Parameters
6.8 Frequency Synthesizer Characteristics
TA = 25°C, VDD = 3.0 V if nothing else stated. All measurement results are obtained using the
CC2510EM reference designs ([1]).
Parameter
Min
Typ
Max
Unit
Condition/Note
Programmed frequency
resolution3
366
366
397
366
412
366
Hz
CC2510Fx
CC2511Fx
Frequency resolution = fRef/ 216
Synthesizer frequency
tolerance
±40
ppm
Given by crystal used. Required accuracy (including
temperature and aging) depends on frequency band and
channel bandwidth / spacing.
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
RF carrier phase noise
−77
−77
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
@ 50 kHz offset from carrier
@ 100 kHz offset from carrier
@ 200 kHz offset from carrier
@ 500 kHz offset from carrier
@ 1 MHz offset from carrier
@ 2 MHz offset from carrier
@ 5 MHz offset from carrier
@ 10 MHz offset from carrier
−78
−88
−98
−107
−116
−25
3 fRef = fXOSC for CC2510Fx and fRef = fXOSC /2 for CC2511Fx
For CC2510Fx Min figures are given using fXOSC = 24 MHz. Typ figures are given using fXOSC = 26 MHz,
and Max figures are given using fXOSC = 27 MHz. For CC2511Fx, fXOSC = 48 MHz
SWRS055F
Page 18 of 241
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