CC2500-RTR1 datasheet(10/84 Pages) TI

10 / 84 page

CC2500

PRELIMINARY Data Sheet (Rev.1.2)

SWRS040A

Page 10 of 83

4.3

RF Transmit Section

Tc = 25

°C, VDD = 3.0 V, 0 dBm if nothing else stated. All measurement results obtained using the CC2500EM reference

design.

Parameter

Min

Typ

Max

Unit

Condition/Note

Differential load

impedance

80 + j74

Ω

Differential impedance as seen from the RF-port (RF_P and

RF_N) towards the antenna. Follow the CC2500EM

reference design available from the TI and Chipcon

websites.

Output power,

highest setting

dBm

Output power is programmable and is available across the

entire frequency band.

Delivered to a 50

Ω single-ended load via CC2500EM

reference design RF matching network.

Output power,

lowest setting

–30

dBm

Output power is programmable and is available across the

entire frequency band.

Delivered to a 50

Ω single-ended load via CC2500EM

reference design RF matching network.

Spurious emissions

25 MHz – 1 GHz

47-74, 87.5-118, 174-

230, 470-862 MHz

1800-1900 MHz

At 2·RF and 3·RF

Otherwise above 1

GHz

–36

–54

–47

–41

–30

dBm

Restricted band in Europe

Restricted bands in USA

Table 6: RF transmit parameters

4.4

Crystal Oscillator

Tc = 25

°C, VDD = 3.0 V if nothing else stated.

Parameter

Min

Typ

Max

Unit

Condition/Note

Crystal frequency

MHz

Tolerance

±40

ppm

This is the total tolerance including a) initial tolerance, b) crystal

loading, c) aging and d) temperature dependence.

The acceptable crystal tolerance depends on RF frequency and

channel spacing / bandwidth.

ESR

100

Ω

Start-up time

300

µs

Measured on CC2500EM reference design.

Table 7: Crystal oscillator parameters

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