CC400-RTR2 datasheet(6/31 Pages) TI

6 / 31 page

CC400

SWRS050

Page 6 of 32

RF Transmit Section

Tc = 25°C, VDD = 3.0V if nothing else stated. Measured on Chipcon’s

CC400DB reference

design.

Parameter

Min.

Typ.

Max.

Unit

Condition

Binary FSK frequency separation

200

kHz

The frequency corresponding to

the digital "0" is denoted f0, while

f1 corresponds to a digital "1".

The frequency separation is f1-f0.

The RF carrier frequency, fc, is

then given by fc=(f0+f1)/2.

(The frequency deviation is given

by fd=+/-(f1-f0)/2 )

The frequency separation is

programmable in steps of 1 kHz.

Programmable output power

-5

dBm

Delivered to matched load.

The output power is

programmable in steps of 1 dB.

RF output impedance

400

Ω ||

3 pF

Transmit mode, parallel

equivalent. For matching details

see “Input/ output matching” p.16.

Harmonics

-30

dBc

When transmitting high output

power levels an external LC or

SAW filter may be used to reduce

harmonics emission to comply

with ISM requirements. See p.

17.

Table 6: RF Transmit Section

IF Section

Parameter

Min.

Typ.

Max.

Unit

Condition

Intermediate frequency (IF)

200

455

kHz

The IF is programmable. Either

60 kHz, 200 kHz or 455 kHz can

be chosen.

An optional external IF filter can

be used if 455 kHz is chosen.

The impedance level is 1.5 k

Ω

Table 7: IF Section

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