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| 型號： | 1200 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC20 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QLP-20 |
| 文件頁數(shù)： | 2/70頁 |
| 文件大?。?/td> | 841K |
| 代理商： | 1200 |
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Chipcon
SmartRF CC1100
Chipcon AS
SmartRF
CC1100 Preliminary Data Sheet (rev. 1.0) 2005-04-25
Page 10 of 68
8
Low Power RC Oscillator
Typical performance is for Tc = 25
°C @ VDD = 3.0 V if nothing else is stated.
The values in the table are simulated results and will be updated in later versions of the data sheet.
Parameter
Min
Typ
Max
Unit
Condition/Note
Calibrated frequency
34.6
34.7
36
kHz
Calibrated RC Oscillator frequency is XTAL
frequency divided by 750
Frequency accuracy after
calibration
±0.2
%
Temperature coefficient
+0.4
% /
°C
Frequency drift when temperature changes
after calibration
Supply voltage coefficient
+3
% / V
Frequency drift when supply voltage changes
after calibration
Initial calibration time
2
ms
When the RC Oscillator is enabled, calibration
is continuously done in the background as long
as the crystal oscillator is running.
Wake-up period
58e-6
59650
Seconds
Programmable, dependent on XTAL frequency
Table 8: RC Oscillator parameters
9
Frequency Synthesizer Characteristics
Tc = 25
°C @ VDD = 3.0 V if nothing else is stated. Measured on Chipcon’s CC1100EM 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
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 and
TX/RX settling time
10
s
Settling time for the 1xIF frequency step from RX to TX,
and vice versa.
PLL calibration time
0.69
18739
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 9: Frequency Synthesizer Parameters
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