CC2430-RTR1-F64 datasheet(17/234 Pages) TI

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CC2430

CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A

Page 17 of 232

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

MHz

Calibrated High Speed RC Oscillator

frequency is XTAL frequency multiplied by 1/2

Uncalibrated frequency

accuracy

±18

Measured on Chipcon’s

CC2430 EM reference

design.

Calibrated frequency

accuracy

±0.6

±1

Start-up time

µs

Temperature coefficient

-325

ppm /

°C

Frequency drift when temperature changes

after calibration

Supply voltage coefficient

ppm / mV

Frequency drift when supply voltage changes

after calibration

Initial calibration time

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 CC2430 EM reference design.

Parameter

Min

Typ

Max

Unit

Condition/Note

Phase noise

−107

−113

−119

−121

dBc/Hz

Unmodulated carrier

At ±1 MHz offset from carrier

At ±2 MHz offset from carrier

At ±3 MHz offset from carrier

At ±5 MHz offset from carrier

PLL lock time

192

µs

The startup time when the crystal oscillator is running

and RX / TX turnaround time

Table 12: Frequency Synthesizer Parameters

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