CC1021 datasheet(7/94 Pages) TI

7 / 94 page

CC1021

SWRS045C

Page 7 of 87

Parameter

Min

Typ

Max

Unit

Condition / Note

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/+5 dBm at 433/868 MHz.

To comply with EN 300 220,

FCC CFR47 part 15 and ARIB

STD-T96 an external (antenna)

filter, as implemented in the

application circuit in Figure 25,

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

54 + j44

15 + j24

20 + j35

Ω

Transmit mode. For matching

details see section 14 on page

46.

Table 3. RF transmit parameters

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