CC2420Z-RTR1 datasheet(11/92 Pages) TI

11 / 92 page

CC2420

SWRS041B

Page 11 of 89

Parameter

Min.

Typ.

Max.

Unit

Condition / Note

Frequency error tolerance

-300

300

kHz

Difference between centre

frequency of the received RF

signal and local oscillator

frequency

[1] requires 200 kHz

Symbol rate error tolerance

120

ppm

Difference between incoming

symbol rate and the internally

generated symbol rate

[1] requires 80 ppm

Data latency

µs

Processing delay in receiver.

Time from complete transmission

of SFD until complete reception

of SFD, i.e. from SFD goes active

on transmitter until active on

receiver.

6.4

RSSI / Carrier Sense

Parameter

Min.

Typ.

Max.

Unit

Condition / Note

Carrier sense level

− 77

dBm

Programmable in

RSSI.CCA_THR

RSSI dynamic range

100

The range is approximately from

–100 dBm to 0 dBm

RSSI accuracy

± 6

See page 48 for details

RSSI linearity

± 3

RSSI average time

128

µs

8 symbol periods, as specified by

[1]

6.5

IF Section

Parameter

Min.

Typ.

Max.

Unit

Condition / Note

Intermediate frequency (IF)

MHz

6.6

Frequency Synthesizer Section

Parameter

Min.

Typ.

Max.

Unit

Condition / Note

Crystal oscillator frequency

MHz

See page 53 for details.

Crystal frequency accuracy

requirement

- 40

ppm

Including aging and temperature

dependency, as specified by [1]

Crystal operation

Parallel

C381 and C391 are loading

capacitors, see page 53

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