U2745B Datasheet, PDF (5/9 Pages) ATMEL Corporation – UHF ASK TRANSMITTER

U2745B
Figure 4. Measurement Output Network
PWRVCC
ANT
V_S
L₁₀
Z_Load-opt
C₁₀
50 W
Figure 5. Application Circuit
+V_S = 2.2 ... 4.0 V
ASK
EN
C₆
CLK
3.39 MHz
ASK
1
EN
2
VCC
3
CLK
4
GND
5
C₅
R₄
LFVCC
6
LFGND
7
C_{1 LF}
8
OR
Power
up
VCO
f
64
f
n
U2745B
PA
XTO
C₂
GND
16
PWRSET
15
PWRVCC
14
ANT
13
R_PWRSET
C₄
PWRGND1
12
C_Loop2
L_Feed
C_Loop1
PWRGND2
11
XTO1
13.56 MHz
10
NC
C₃
9
Antenna
5
4734A–RKE–11/03