u2745b ATMEL Corporation, u2745b Datasheet - Page 5

• Manufacturer Part Number: u2745b
• Description: Uhf Ask Transmitter
• Manufacturer: ATMEL Corporation

Figure 5. Application Circuit
4734A–RKE–11/03
ASK
CLK
EN
3.39 MHz
C
6
C
5
R
4
Figure 4. Measurement Output Network
C
C
2
LFGND
1
LFVCC
GND
VCC
ASK
CLK
EN
LF
1
2
3
4
5
6
7
8
Power
U2745B
OR
up
VCO
f
f
64
n
PWRVCC
ANT
XTO
PA
16
15
14
13
12
11
10
9
GND
PWRSET
PWRVCC
ANT
PWRGND1
PWRGND2
XTO1
NC
+V
S
= 2.2 ... 4.0 V
50 W
V
L
C
S
10
10
13.56 MHz
R
PWRSET
Z
Load-opt
C
4
Antenna
C
L
C
Feed
3
Loop1
C
Loop2
U2745B
5