CC1150-RTR1 datasheet(8/67 Pages) TI

8 / 67 page

CC1150

SWRS037A

Page 8 of 60

4.3

Crystal Oscillator

Tc = 25

°C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1150EM reference

design ([1] and [2]).

Parameter

Min

Typ

Max

Unit

Condition/Note

Crystal frequency

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

Load capacitance

Simulated over operating conditions

ESR

100

Ω

Start-up time

150

µs

Measured on the CC1150EM reference design ([1] and [2]). This

parameter is to a large degree crystal dependent.

Table 6: Crystal Oscillator Parameters

4.4

Frequency Synthesizer Characteristics

Tc = 25

°C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1150EM reference design

([1] and [2]).

Parameter

Min

Typ

Max

Unit

Condition/Note

Programmed

frequency resolution

397

FXOSC/

412

26 MHz-27 MHz crystals. 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

–82

dBc/Hz

@ 50 kHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–86

dBc/Hz

@ 100 kHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–90

dBc/Hz

@ 200 kHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–98

dBc/Hz

@ 500 kHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–106

dBc/Hz

@ 1 MHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–113

dBc/Hz

@ 2 MHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–119

dBc/Hz

@ 5 MHz offset from carrier, carrier at 868 MHz

RF carrier phase noise

–127

dBc/Hz

@ 10 MHz offset from carrier, carrier at 868 MHz

PLL turn-on / hop time

85.1

88.4

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

694

18739

721

XOSC

cycles

µs

Calibration can be initiated manually or automatically

before entering or after leaving TX.

Min/typ/max time is for 27/26/26 MHz crystal frequency.

Table 7: Frequency Synthesizer Parameters

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