CC1111F32RSP datasheet(39/245 Pages) TI

39 / 245 page

CC1110Fx / CC1111Fx

SWRS033G

Page 39 of 244

C171

3.0 V - 3.6 V power supply

2,12 DVDD

30 DCOUPL

AVDD 26

AVDD 25

RF_N 24

RF_P 23

AVDD 22

R271

C203

C214

C301

DIE ATTACH PAD:

C181

Optional:

R262

R263

10 DP

11 DM

D+

D-

C231 C232

L232

L242

C241

L231

L233

C235

L241

C234

C233

L234

Antenna

(50 Ohm)

R264

4 P1_0

C236

L235

Alternative filter that can be

used to reduce the emission at

699 MHz below -54 dBm, for

conducted measurements.

C235'

Figure 12: Application Circuit for

CC1111Fx 868/915 MHz with Fundamental Crystal (excluding

supply decoupling capacitors)

Component

Description

C301

Decoupling capacitor for on-chip voltage regulator to digital part

C203/C214

Crystal loading capacitors (X3)

C201/C211

Crystal loading capacitors (X1)

L231/L241/C231

Low-pass filter/match

L232/L242/C234/C241

Balun

L233/L234/C233

Filter

C234

DC block

L235/C236

Alternative filter to reduce the emission at 699 MHz

C235/C235’

DC block or part of filter to reduce emission at 699 MHz

C181/C171

Crystal loading capacitors if X2 is used.

L281

Crystal inductor

R271

Resistor for internal bias current reference

R264

D+ Pull-up resistor

R262/R263

D+ / D

− series resistors for impedance matching

26 - 27 MHz crystal

32.768 kHz crystal, optional

48 MHz crystal (fundamental)

Table 28: Overview of External Components (excluding supply decoupling capacitors)

CC1111F32RSP Datasheet(PDF) 39 Page - Texas Instruments

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