參數(shù)資料
型號(hào): T48C862x-Rf-TNQ
廠商: Atmel Corp.
元件分類: 4位微控制器
英文描述: Microcontroller with UHF ASK/FSK Transmitter
中文描述: 微控制器,帶有超高頻ASK / FSK發(fā)射器
文件頁(yè)數(shù): 8/108頁(yè)
文件大?。?/td> 1023K
代理商: T48C862X-RF-TNQ
8
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
Figure 5.
Output Power Measurement
Application Circuit
For the supply-voltage blocking capacitor C
3
, a value of 68 nF/X7R is recommended
(see Figure 6 on page 9 and Figure 7 on page 10). C
1
and C
2
are used to match the loop
antenna to the power amplifier where C
1
typically is 8.2 pF/NP0 and C
2
is 6 pF/NP0
(10 pF + 15 pF in series); for C
2
two capacitors in series should be used to achieve a
better tolerance value and to have the possibility to realize the Z
Load,opt
by using stan-
dard valued capacitors.
C
1
forms together with the pins of PLL transmitter block and the PCB board wires a
series resonance loop that suppresses the 1
st
harmonic, thus, the position of C
1
on the
PCB is important. Normally the best suppression is achieved when C
1
is placed as close
as possible to the pins ANT1 and ANT2.
The loop antenna should not exceed a width of 1.5 mm, otherwise the Q-factor of the
loop antenna is too high.
L
1
(
50 nH to 100 nH) can be printed on PCB. C
4
should be selected so the XTO runs
on the load resonance frequency of the crystal. Normally, a value of 12 pF results for a
15 pF load-capacitance crystal.
~
~
ANT2
ANT1
Rin
50
Power
meter
C
1
= 1n
L
1
= 33n
C
2
= 2.2p
Z
Lopt
V
S
Z = 50
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T48C862X-RF-TNS 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with UHF ASK/FSK Transmitter
T48C893 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types
T48C893-TK 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types
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