In table 1 and typical values, Figure 3, Cc2420 – Texas Instruments 3138 155 232931 User Manual
Page 20: Table 1. overview of external components, Rf transceiver
CC2420
SWRS041B Page 20 of 89
Ref
Description
C42
Voltage regulator load capacitance
C61
Balun and match
C62
DC block to antenna and match
C71
Front-end bias decoupling and match
C81
Balun and match
C381
16MHz crystal load capacitor, see page 53
C391
16MHz crystal load capacitor, see page 53
L61
DC bias and match
L62
DC bias and match
L71
DC bias and match
L81
Balun and match
R451
Precision resistor for current reference generator
XTAL
16MHz crystal, see page 53
Table 1. Overview of external components
35
34
33
32
31
30
29
28
27
26
25
36
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
1
2
3
4
5
6
7
8
9
10
11
12
QLP48
7x7
CC2420
RF
Transceiver
D
SUB
_CO
RE
D
SUB
_PA
DS
AVD
D_A
DC
DVD
D_A
DC
D
GUA
RD
AVD
D_I
F2
DG
ND_
GUA
RD
AVD
D_R
F2
DG
ND
NC
NC
RES
ETn
RF_P
RF_N
AVDD_PRE
AVDD_RF1
TXRX_SWITCH
AVDD_VCO
VCO_GUARD
AVDD_SW
GND
GND
NC
NC
V
R
E
G_O
UT
A
V
D
D_C
HP
R
_BI
AS
A
V
D
D_I
F1
VR
EG_
IN
VR
EG_
EN
XO
SC
16_
Q1
XO
SC
16_
Q2
A
TES
T2
A
TES
T1
NC
AVD
D_X
OSC
16
CSn
FIFO
FIFOP
CCA
SFD
DVDD1.8
SCLK
DVDD_RAM
SI
SO
DVDD3.3
NC
XTAL
D
ig
ita
l In
te
rf
ac
e
3.3 V
Power
supply
λ/2
λ/2
Antenna
(50 Ohm)
L61
C81
L81
L71
R451
C42
C391
C381
Figure 3. Typical application circuit with transmission line balun for single-ended
operation