CC1070RGWR datasheet(7/57 Pages) TI

Part #	CC1070RGWR

Description	Single Chip Low Power RF Transmitter for Narrowband Systems

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CC1070

SWRS043A

Page 7 of 54

Parameter

Min.

Typ.

Max.

Unit

Condition / Note

Modulation bandwidth, 868 MHz

19.2 kBaud, ±9.9 kHz frequency

deviation

38.4 kBaud, ±19.8 kHz frequency

deviation

48

106

kHz

Bandwidth where the power

envelope of modulation equals

–36 dBm. Spectrum analyzer

RBW = 1 kHz.

Spurious emission, radiated CW

47-74, 87.5-118,

174-230, 470-862 MHz

9 kHz – 1 GHz

1 – 4 GHz

-54

-36

-30

dBm

At maximum output power,

+10/+8 dBm at 433/868 MHz.

To comply with EN 300 220,

FCC CFR47 part 15 and ARIB

STD T-67 an external (antenna)

filter, as implemented in the

application circuit in Figure 14,

must be used and tailored to

each individual design to reduce

out-of-band spurious emission

levels.

Spurious emissions can be

measured as EIRP values

according to EN 300 220. The

antenna (SMAFF-433 and

SMAFF-868 from R.W. Badland)

plays a part in attenuating the

spurious emissions.

If the output power is increased

using an external PA, a filter must

be used to attenuate spurs below

862 MHz when operating in the

868 MHz frequency band in

Europe. Application Note AN036

CC1020/1021 Spurious Emission

presents and discusses a solution

that reduces the TX mode

spurious emission close to 862

MHz by increasing the REF_DIV

from 1 to 7.

Optimum load impedance

433 MHz

868 MHz

915 MHz

91 + j16

34 + j25

28 + j21

Ω

Transmit mode. For matching

details see section 13 on page

26.

Table 3. RF transmit parameters

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