CC2400 Datasheet, PDF (18/84 Pages) Texas Instruments – 2.4 GHz Low-Power RF Transceiver

CC2400
Ref
C71
C61
C81
C62
C421
C431
L61
L62
L71
L81
R451
XTAL
Description
Front-end bias decoupling and match, see page 50
Discrete balun and match, see page 50
Discrete balun and match, see page 50
DC block to antenna and match
16MHz crystal load capacitor, see page 49
16MHz crystal load capacitor, see page 49
DC bias and match, see page 50
DC bias and match, see page 50
RF blocking inductor, see page 50
Discrete balun and match, see page 50
Precision resistor for current reference generator
16MHz crystal, see page 49
Table 10. Overview and description of external components for an unbalanced antenna
(balun implemented with low cost discrete components)
AVDD=1.8V AVDD=1.8V
R451
AVDD=1.8V
C431
C421
XTAL
Antenna
(50 Ohm) C61
L62
C71
C62
L61
L81
C81
1
2
3
4
5
6
7
L71 ₈
9
10
11
12
VCO_GUARD
AVDD_VCO
AVDD_PRE
AVDD_RF1
GND
RF_P
TXRX_SWITCH
RF_N
GND
AVDD_SW
NC
NC
CC2400
NC ³⁶
GIO6 ³⁵
34
SO
SI ³³
SCLK ³²
CSn ³¹
30
DCLK/FIFO
29
DIO/PKT
TX ²⁸
RX ²⁷
26
DVDD1.8
25
DVDD3.3
SPI-bus
Optional
digital
interface
DVDD=1.8V
DVDD Digital I/O
=1.8 / 3.3V
AVDD=1.8V
DVDD=1.8V
Figure 3 Typical application circuit with discrete balun for interfacing single-ended
antenna
SWRS042A
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