U2741B_05 Datasheet, PDF (6/11 Pages) ATMEL Corporation – UHF ASK/FSK TRANSMITTER

Figure 5-2. Application Circuit
+V_S = 2.0 ... 5.5 V
ASK
FSK
C₇
CLK
3.39 MHz
C₆
R₄
ASK
1
FSK
2
VCC
3
CLK
4
GND
5
LFVCC
6
LFGND
7
C_{1 LF}
8
OR
Power
up
VCO
f
64
f
n
U2741B
PA
XTO
C₂
DIVC
16
PWRSET
15
PWRVCC
14
R_PWRSET
ANT
C₅
13
PWRGND1
12
C_Loop2
L_Feed
C_Loop1
PWRGND2
11
XTO1
13.56 MHz
10
XTO2
C₄
9
C₃
Antenna
6 U2741B
4733B–RKE–09/05