Texas Instruments 3138 155 232931 - Manual (Page 11)

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 3 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 dB The range is approximately from
–100 dBm to 0 dBm
RSSI accuracy ± 6 dB See page 48 for details
RSSI linearity ± 3 dB
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) 2 MHz
6.6 Frequency Synthesizer Section
Parameter Min. Typ. Max. Unit Condition / Note
Crystal oscillator frequency 16 MHz See page 53 for details.
Crystal frequency accuracy
requirement - 40 40 ppm Including aging and temperature
dependency, as specified by [1]
Crystal operation Parallel C381 and C391 are loading
capacitors, see page 53