Specifications

CC1101
SWRS061I Page 19 of 98
4.6 Frequency Synthesizer Characteristics
T
A
= 25C, VDD = 3.0 V if nothing else is stated. All measurement results are obtained using the CC1101EM reference designs
([1] and [2]). Min figures are given using a 27 MHz crystal. Typ and max figures are given using a 26 MHz crystal.
Table 15: Frequency Synthesizer Parameters
4.7 Analog Temperature Sensor
T
A
= 25C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1101EM reference designs ([1]
and [2]). Note that it is necessary to write 0xBF to the PTEST register to use the analog temperature sensor in the IDLE state.
Table 16: Analog Temperature Sensor Parameters
Parameter
Min
Typ
Max
Unit
Condition/Note
Programmed frequency
resolution
397
F
XOSC
/
2
16
412
Hz
26-27 MHz crystal. The resolution (in Hz) is equal
for all frequency bands
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
–92
dBc/Hz
@ 50 kHz offset from carrier
RF carrier phase noise
–92
dBc/Hz
@ 100 kHz offset from carrier
RF carrier phase noise
–92
dBc/Hz
@ 200 kHz offset from carrier
RF carrier phase noise
–98
dBc/Hz
@ 500 kHz offset from carrier
RF carrier phase noise
–107
dBc/Hz
@ 1 MHz offset from carrier
RF carrier phase noise
–113
dBc/Hz
@ 2 MHz offset from carrier
RF carrier phase noise
–119
dBc/Hz
@ 5 MHz offset from carrier
RF carrier phase noise
–129
dBc/Hz
@ 10 MHz offset from carrier
PLL turn-on / hop time
( See Table 34)
72
75
75
s
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 time
( See Table 34)
29
30
30
s
Settling time for the 1·IF frequency step from RX
to TX
PLL TX/RX settling time
( See Table 34)
30
31
31
s
Settling time for the 1·IF frequency step from TX
to RX. 250 kbps data rate.
PLL calibration time
(See Table 35)
685
712
724
s
Calibration can be initiated manually or
automatically before entering or after leaving
RX/TX
Parameter
Min
Typ
Max
Unit
Condition/Note
Output voltage at –40C
0.651
V
Output voltage at 0C
0.747
V
Output voltage at +40C
0.847
V
Output voltage at +80C
0.945
V
Temperature coefficient
2.47
mV/C
Fitted from –20 C to +80 C
Error in calculated
temperature, calibrated
-2
*
0
2
*
C
From –20 C to +80 C when using 2.47 mV / C, after
1-point calibration at room temperature
*
The indicated minimum and maximum error with 1-
point calibration is based on simulated values for
typical process parameters
Current consumption
increase when enabled
0.3
mA