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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
DSUB_CORE
DSUB_PADS
AVDD_ADC
DVDD_ADC
DGUARD
AVDD_IF2
DGND_GUARD
AVDD_RF2
DGND
NC
NC
RESETn
RF_P
RF_N
AVDD_PRE
AVDD_RF1
TXRX_SWITCH
AVDD_VCO
VCO_GUARD
AVDD_SW
GND
GND
NC
NC
VREG_OUT
AVDD_CHP
R_BIAS
AVDD_IF1
VREG_IN
VREG_EN
XOSC16_Q1
XOSC16_Q2
ATEST2
ATEST1
NC
AVDD_XOSC16
CSn
FIFO
FIFOP
CCA
SFD
DVDD1.8
SCLK
DVDD_RAM
SI
SO
DVDD3.3
NC
XTAL
Digital Interface
3.3 V
Power
supply
Antenna
(50 Ohm)
L61
C81 L81
L71
R451
C42
C391 C381
Figure 3. Typical application circuit with transmission line balun for single-ended
operation