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RFM02

Output capacitance

(set by the automatic

antenna tuning circuit)

At low bands

At high bands

1.5

1.6

2.3

2.2

2.8

3.1

pF

Quality factor of the

output capacitance

16

18

22

pF

Output phase noise

100 kHz from carrier

1 MHz from carrier (Note 7)

-85

-105

dBc/Hz

FSK bit rate

(Note 7)

115.2

kbps

FSK frequency

deviation

Programmable in 30 kHz steps

30

210

kHz

Crystal load

capacitance See

Crystal Selection

Guidelines

Programmable in 0.5 pF steps,

tolerance +/-10%

8.5

16

pF

Internal POR timeout

(Note 6)

final value

50

ms

Crystal oscillator

startup time

Crystal ESR < 100 Ohms

1.5

5

ms

Wake-up timer clock

period

Calibrated every 30 seconds

0.95

1.05

ms

Programmable

wake-up time

1

5 *10

11

ms

Digital input

capacitance

2

pF

Digital output rise/fall

time

15 pF pure capacitive load

10

ns

Note 1: Using a CR2032 battery (225 mAh capacity), the expected battery life is greater than 2 years

using a 60-second wake-up period for sending 50 byte packets in length at 19.2 kbps with +6 dBm output

power in the 915 MHz band.

Note 2: Using anything but a 10 MHz crystal is allowed but not recommended because all

crystal-referred timing and frequency parameters will change accordingly.

Note 3: Adjustable in 8 steps.

Note 4: Optimal antenna admittance/impedance for the RFM02:

Yantenna [S]

Zantenna [Ohm]

Lantenna [nH]

434 MHz

1.3E-3 - j6.3E-3

31 + j152

58.00

868 MHz

1.35E-3 - j1.2E-2

9 + j82

15.20

915 MHz

1.45E-3 - j1.3E-2

8.7 + j77

13.60

Note 5: With selective resonant antennas .

Note 6: During this period, no commands are accepted by the chip.

Note 7: The maximum FSK bitrate and the Output phase noise are dependent on the actual setting of the

PLL Setting Command.