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1194 Datasheet(PDF) 7 Page - Texas Instruments

Part # 1194
Description  Single Chip Low Cost Low Power RF-Transmitter
PDF  50 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

1194 Datasheet(HTML) 7 Page - Texas Instruments

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CC2550
Preliminary Data Sheet (rev. 1.1)
SWRS039
Page 7 of 51
7
Crystal Oscillator
Tc = 25
°C @ VDD = 3.0V if nothing else is stated.
Parameter
Min
Typ
Max
Unit
Condition/Note
Crystal frequency
26
26
27
MHz
Tolerance
±40
ppm
This is the total tolerance including a) initial tolerance, b) aging
and c) temperature dependence.
The acceptable crystal tolerance depends on RF frequency and
channel spacing / bandwidth.
ESR
100
Ω
Start-up time
300
µs
Measured on Chipcon’s CC2500EM reference design.
Table 6:Crystal Oscillator Parameters
8
Frequency Synthesizer Characteristics
Tc = 25
°C @ VDD = 3.0V if nothing else is stated. The values are preliminary results and will be updated in later versions
of the data sheet.
Parameter
Min
Typ
Max
Unit
Condition/Note
Programmed
frequency resolution
397
FXOSC/
2
16
412
Hz
26MHz-27MHz crystal.
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
–76
dBc/Hz
@ 50kHz offset from carrier
RF carrier phase noise
–76
dBc/Hz
@ 100kHz offset from carrier
RF carrier phase noise
–79
dBc/Hz
@ 200kHz offset from carrier
RF carrier phase noise
–87
dBc/Hz
@ 500kHz offset from carrier
RF carrier phase noise
–97
dBc/Hz
@ 1MHz offset from carrier
RF carrier phase noise
–106
dBc/Hz
@ 2MHz offset from carrier
RF carrier phase noise
–116
dBc/Hz
@ 5MHz offset from carrier
RF carrier phase noise
–126
dBc/Hz
@ 10MHz offset from carrier
PLL turn-on / hop time
80
µs
Time from leaving the IDLE state until arriving in the
FSTXON or TX state, when not performing calibration.
Crystal oscillator running.
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 7: Frequency Synthesizer Parameters



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