CC1020-RTR1 datasheet(12/95 Pages) TI1

12 / 95 page

CC1020

SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015

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4.6

RSSI / Carrier Sense

All measurements were performed using the two-layer PCB CC1020EMX reference design. See Figure 6-1. The electrical

specifications given for 868 MHz are also applicable for 902 to 928 MHz. TA = 25°C, AVDD = DVDD = 3.0 V,

fC = 14.7456 MHz if nothing else stated.

PARAMETER

TYP

UNIT

CONDITION

RSSI dynamic range

12.5 and 25 kHz channel spacing

RSSI accuracy

±3

See Section 5.9.5 for details.

RSSI linearity

±1

2.4 kBaud, 12.5 kHz channel spacing

3.8

Shorter RSSI attach times can be traded for

lower RSSI accuracy. See Section 5.9.5 for

4.8 kBaud, 25 kHz channel spacing

1.9

details.

RSSI attach time

Shorter RSSI attach times can also be traded

for reduced sensitivity and selectivity by

153.6 kBaud, 500 kHz channel spacing

140

µs

increasing the receiver channel filter

bandwidth.

Carrier sense programmable range

Accuracy is as for RSSI

12.5 kHz channel spacing

–72

dBm

At carrier sense level –110 dBm, FM jammer

(1 kHz sine, ±2.5 kHz deviation) at adjacent

channel.

Adjacent channel carrier

Adjacent channel carrier sense is measured

sense

25 kHz channel spacing

–72

dBm

by applying a signal on the adjacent channel

and observe at which level carrier sense is

indicated.

At carrier sense level –110 dBm, 100 MHz to

Spurious carrier sense

–70

dBm

2 GHz. Adjacent channel and image channel

are excluded.

4.7

Intermediate Frequency (IF)

All measurements were performed using the two-layer PCB CC1020EMX reference design. See Figure 6-1. The electrical

specifications given for 868 MHz are also applicable for 902 to 928 MHz. TA = 25°C, AVDD = DVDD = 3.0 V,

fC = 14.7456 MHz if nothing else stated.

PARAMETER

TYP

UNIT

CONDITION

Intermediate frequency (IF)

307.2

kHz

See Section 5.9.1 for details.

The channel filter 6 dB bandwidth is

Digital channel filter bandwidth

9.6 to 307.2

kHz

programmable from 9.6 kHz to 307.2 kHz. See

Section 5.9.2 for details.

At 2.4 kBaud

AFC resolution

150

Given as Baud rate / 16. See Section 5.9.3 for

details.

Specifications

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