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CC1110-RTR1 데이터시트(PDF) 17 Page - Texas Instruments

부품명 CC1110-RTR1
상세설명  True System-on-Chip with Low Power RF Transceiver and 8051 MCU
PDF  203 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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CC1110-RTR1 데이터시트(HTML) 17 Page - Texas Instruments

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CC1110
CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A
Page 17 of 202
7.7
High Speed RC Oscillator
TA=25°C, VDD=3.0V if nothing else is stated.
Parameter
Min
Typ
Max
Unit
Condition/Note
Frequency
13
MHz
Calibrated High Speed RC Oscillator
frequency is XTAL frequency multiplied by 1/2
Uncalibrated frequency
accuracy
±15
%
Calibrated frequency
accuracy
±1
%
Start-up time
10
µs
Temperature coefficient
-325
ppm /
°C
Frequency drift when temperature changes
after calibration
Supply voltage coefficient
28
ppm / V
Frequency drift when supply voltage changes
after calibration
Initial calibration time
50
µs
When the High Speed RC Oscillator is
enabled, calibration is continuously done in the
background as long as the crystal oscillator is
running.
Table 11: High Speed RC Oscillator parameters
7.8
Frequency Synthesizer Characteristics
TA=25°C, VDD=3.0V if nothing else stated. Measured on Chipcon’s CC1110 EM reference design.
Parameter
Min
Typ
Max
Unit
Condition/Note
Programmed
frequency resolution
397
FXOSC/
2
16
412
Hz
26MHz-27MHz 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.
PLL turn-on / hop time
80
µs
Time from leaving the IDLE state (see Figure 38) until
arriving in the RX, FSTXON or TX state, when not
performing calibration.
Crystal oscillator running.
PLL RX/TX and
TX/RX settling time
10
µs
Settling time for the 1xIF frequency step from RX to TX,
and vice versa.
PLL calibration time
0.69
18739
0.72
0.72
XOSC
cycles
ms
Calibration can be initiated manually, or automatically
before entering or after leaving RX/TX.
Min/typ/max time is for 27/26/26MHz crystal frequency.
Table 12: Frequency Synthesizer Parameters



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