mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 181

• Manufacturer Part Number: mc68hc908rf2
• Description: M68hc08 Microcontrollers Microcontroller / Transmitter
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908RF2 — Rev. 4.0
MOTOROLA
NOTE:
The configuration shown in
output power and harmonics rejection. Schematic in
equivalent circuit of the pin RFOUT and impeder as well as the matching network
components for 434-MHz frequency band.
Note that the impeder is moved to the load side to decrease its influence (similar
to dc bias through the antenna).
Figure 14-6
with 50-Ω load and with matching network.
(a)
(b)
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 14-5. Ouput Characteristic and Matching Network
gives the output power versus the R
1.5 pF
Go to: www.freescale.com
RFOUT
C
RFOUT PIN
0
Electrical Specifications
V
250 Ω
for 434-MHz Frequency Band
CC
R
0
Figure
14-5(a) provides a better efficiency in terms of
MATCHING
NETWORK
39 nH
IMPEDER: TDK MMZ1608Y102CTA00
L
1
MATCHING
NETWORK
EXT
IMPEDER
R
Figure
I
resistor value, in both cases
3 kΩ
RF OUTPUT
UHF Transmitter Module
Electrical Specifications
14-5(b) gives the
50 Ω
330 pF
C
3
Data Sheet
LOAD
R
L
50 Ω
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