CC1110Fx / CC1111Fx
7.7 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
Initial calibration time
28
ppm/V
Frequency drift when supply voltage changes after
calibration
65
µs
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}. See
13.1.5.1 for details).
Table 15: High Speed RC Oscillator Parameters
7.8 Frequency Synthesizer Characteristics
TA = 25 °C, VDD = 3.0 V if nothing else stated. All measurement results are obtained using the
CC1110EM reference designs ([1]).
Parameter
Min
Typ
Max
Unit
Condition/Note
Programmed frequency
resolution
367
397
412
Hz
24 - 27 MHz system clock.
Frequency resolution = fXOSC / 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
PLL turn-on / hop time3
-92
-93
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
µs
@ 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
-93
-98
-107
-113
-119
-129
88.4
85.1
95.8
Time from leaving the IDLE state until arriving in the RX,
FSTXON, or TX state, when not performing calibration.
Crystal oscillator running.
PLL RX/TX settling time3
PLL TX/RX settling time3
PLL calibration time3
9.3
20.7
694
9.6
21.5
721
10.4
23.3
Settling time for the 1·IF frequency step from RX to TX
Settling time for the 1·IF frequency step from TX to RX
µs
µs
µs
780.8
Calibration can be initiated manually or automatically
before entering or after leaving RX/TX.
Table 16: Frequency Synthesizer Parameters
3
Min figures are given using fXOSC = 27 MHz. Typ figures are given using fXOSC = 26 MHz, and Max
figures are given using fXOSC = 24 MHz.
SWRS033E
Page 22 of 239
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
