CC1020-RTR1 datasheet(50/95 Pages) TI1

50 / 95 page

CC1020

SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015

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Table 5-12. Typical PLL Turn-on Time to Within ±10% of Channel Spacing for Different Loop Filter

Bandwidths

PLL TURN-ON TIME

COMMENT

[nF]

[pF]

Ω]

[µs]

Up to 4.8 kBaud data

rate,

220

8200

2200

1.5

4.7

3200

12.5 kHz channel

spacing

Up to 4.8 kBaud data

100

3900

1000

2.2

6.8

2500

rate,

25 kHz channel spacing

Up to 9.6 kBaud data

2200

560

3.3

1400

rate,

50 kHz channel spacing

Up to 19.2 kBaud data

560

150

5.6

1300

rate,

100 kHz channel spacing

Up to 38.4 kBaud data

3.9

120

1080

rate,

150 kHz channel spacing

Up to 76.8 kBaud data

1.0

3.3

950

rate,

200 kHz channel spacing

Up to 153.6 kBaud data

0.2

1.5

—

150

700

rate,

500 kHz channel spacing

5.12.4 PLL Lock Time Versus Loop Filter Bandwidth

If calibration has been performed the PLL lock time is the time needed for the PLL to lock to the desired

frequency when going from RX to TX mode or vice versa. The PLL lock time depends on the PLL loop

filter bandwidth. Table 5-13 gives the PLL lock time for different PLL loop filter bandwidths.

Table 5-13. Typical PLL Lock Time to Within ±10% of Channel Spacing for Different Loop Filter

Bandwidths(1)

PLL LOCK TIME [µs]

Comment

[nF]

[pF]

Ω]

Up to 4.8 kBaud data rate, 12.5 kHz

220

8200

2200

1.5

4.7

900

180

1300

channel spacing

Up to 4.8 kBaud data rate, 25 kHz

100

3900

1000

2.2

6.8

640

270

830

channel spacing

Up to 9.6 kBaud data rate, 50 kHz

2200

560

3.3

400

140

490

channel spacing

Up to 19.2 kBaud data rate, 100 kHz

560

150

5.6

140

230

channel spacing

Up to 38.4 kBaud data rate, 150 kHz

3.9

120

180

channel spacing

Up to 76.8 kBaud data rate, 200 kHz

1.0

3.3

channel spacing

Up to 153.6 kBaud data rate, 500

0.2

1.5

—

150

kHz channel spacing

(1)

1) 307.2 kHz step,

2) 1 channel step,

3) 1 MHz step

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