Atmel ATAK2270 User Manual
Page 10
Description of the Application Board System
RFID Application Kit ATAK2270 User Manual
3-3
4871E–RFID–04/08
Figure 3-1.
Circuit Diagram of the Antenna Interface
C5
CTUNE1
BF820
R18
BAS21
D6
T1
CTUNE2
Components f
or tuning application
BF820
C8
C6
C7
C9
R9
R10
R11
R17
R16
R21
R19
R20
R22
R3
R13
R14
L2
L1
R12
BAS21
D2
BAS21
D4
BAS21
D5
BAS21
D7
BAS21
12
1
X3
2
3
M14
Antenna
M13
CANT1
Components
for f
eedbac
k
application
D3
BA
V21
D1
R8
R1
X1/6
X2/5
X1/3
X2/10
X2/9
X1/11
X1/7
X2/1
R2
Green
VEXT
VBA
TT
C3
P
o
we
r
DZ1
LD1
DV
S
COIL1
9
T2
COIL2
INPUT
Data in
M12
M2
Data out
IN
OUT
V
CC
Red
TUNE2
LD3
R7
Y
ello
w
RF
on
LD4
M1
M4
MS
51
4
1
5
4
8
11
10
12
OUTPUT
OE
CFE
GND
DGND
HIP
ASS
2
ST
ANDBY
13
16
7
6
3
1
M15
M11
VS
7808
U2
RF
CANT2
J3
Red
TUNE1
LD2
R15
C4