Texas Instruments 3138 155 232931 - Manual (Page 15)

CC2420
SWRS041B Page 15 of 89
7 Pin Assignment
VR
E
G
_
O
U
T
A
V
DD_
CHP
QLP48
7x7
1
2
3
4
5
6
7
8
9
10
11
12
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
CC2420
R_BIAS A
V
DD_
IF1
VR
E
G
_
IN
VR
E
G
_
E
N
X
O
SC
16_Q1
X
O
SC
16_Q2
A
T
EST2
A
T
EST1
NC
RF_P
RF_N
AVDD_PRE
AVDD_RF1
TXRX_SWITCH
AVDD_VCO
VCO_GUARD
AVDD_SW
GND
GND
NC
NC
DS
UB
_
C
ORE
DS
UB
_
P
A
D
S
AVD
D
_
AD
C
DV
DD_
A
D
C
DGUA
RD
A
V
DD_
IF2
DGND_
GUA
R
D
A
V
DD_
RF2
DGND NC
CSn
FIFO
FIFOP
CCA
SFD
DVDD1.8
SCLK
DVDD_RAM
SI
SO
DVDD3.3
NC
A
V
D
D
_
XOSC
16
NC
AGND
Exposed die
attach pad
R
ESETn
Figure 1.
CC2420 Pinout – Top View
Pin Pin Name Pin type Pin Description
- AGND Ground (analog) Exposed die attach pad. Must be connected to solid ground
plane
1 VCO_GUARD Power (analog) Connection of guard ring for VCO (to AVDD) shielding
2 AVDD_VCO Power (analog) 1.8 V Power supply for VCO
3 AVDD_PRE Power (analog) 1.8 V Power supply for Prescaler
4 AVDD_RF1 Power (analog) 1.8 V Power supply for RF front-end
5 GND Ground (analog) Grounded pin for RF shielding
6 RF_P RF I/O Positive RF input/output signal to LNA/from PA in
receive/transmit mode
7 TXRX_SWITCH Power (analog) Common supply connection for integrated RF front-end. Must
be connected to RF_P and RF_N externally through a DC
path
8 RF_N RF I/O Negative RF input/output signal to LNA/from PA in
receive/transmit mode
9 GND Ground (analog) Grounded pin for RF shielding
10 AVDD_SW Power (analog) 1.8 V Power supply for LNA / PA switch
11 NC - Not Connected
12 NC - Not Connected
13 NC - Not Connected
14 AVDD_RF2 Power (analog) 1.8 V Power supply for receive and transmit mixers
15 AVDD_IF2 Power (analog) 1.8 V Power supply for transmit / receive IF chain