參數(shù)資料
型號(hào)： T5744-TKS
廠商： ATMEL CORP
元件分類： 通信及網(wǎng)絡(luò)
英文描述： UHF ASK Receiver
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO20
封裝： SSO-20
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 277K
代理商： T5744-TKS
8
T5744
4521B–RKE–01/03
Receiving
Characteristics
The RF receiver T5744 can be operated with and without a SAW front-end filter. In a
typical automotive application, a SAW filter is used to achieve better selectivity. The
selectivity with and without a SAW front-end filter is illustrated in Figure 7. Note that the
mirror frequency is reduced by 40 dB. The plots are printed relatively to the maximum
sensitivity. If a SAW filter is used, an insertion loss of about 4 dB must be considered.
When designing the system in terms of receiving bandwidth, the LO deviation must be
considered as it also determines the IF center frequency. The total LO deviation is cal-
culated to be the sum of the deviation of the crystal and the XTO deviation of the T5744.
Low-cost crystals are specified to be within ±100 ppm. The XTO deviation of the T5744
is an additional deviation due to the XTO circuit. This deviation is specified to be
±30 ppm. If a crystal of ±100 ppm is used, the total deviation is ±130 ppm in that case.
Note that the receiving bandwidth and the IF-filter bandwidth are equivalent.
Figure 8.
Receiving Frequency Response
Basic Clock Cycle of the
Digital Circuitry
The complete timing of the digital circuitry and the analog filtering is derived from one
clock. According to Figure 9, this clock cycle TClk is derived from the crystal oscillator
(XTO) in combination with a divider. The division factor is controlled by the logical state
at Pin MODE. According to chapter 'RF Front End', the frequency of the crystal oscillator
(f
XTO
) is defined by the RF input signal (f
RFin
) which also defines the operating frequency
of the local oscillator (f
LO
).
Figure 9.
Generation of the Basic Clock Cycle
-100.0
-80.0
-60.0
-40.0
-20.0
0.0
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
df (MHz)
d
without SAW
with SAW
DVCC
XTO
MODE
T
f
16
15
14
Clk
XTO
XTO
Divider
:14/:10
L : USA(:10)
H: Europe(:14)
相關(guān)PDF資料
PDF描述
T5750 UHF ASK/FSK TRANSMITTER
T5750-6AQ UHF ASK/FSK TRANSMITTER
T5753 UHF ASK/FSK TRANSMITTER
T5753-6AQ UHF ASK/FSK TRANSMITTER
T5754 UHF ASK/FSK TRANSMITTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T5746 功能描述:手工工具 SEPARATOR TOOL RoHS:否 制造商:Molex 產(chǎn)品:Extraction Tools 類型: 描述/功能:Extraction tool
T5746F 制造商:Harwin 功能描述:SEPARATOR TOOL 制造商:Harwin 功能描述:SEPARATOR TOOL; SVHC:No SVHC (19-Dec-2012); Series:Datamate L-Tek, J-Tek & Mix-Tek ;RoHS Compliant: NA
T5747 功能描述:折皺器 POSITIONER RoHS:否 制造商:Hirose Connector 類型: 描述/功能:Cable and Shield Crimper
T5747F 制造商:Harwin 功能描述:POSITIONER 制造商:Harwin 功能描述:POSITIONER; For Use With:Harwin M22520/2-01 Hand Crimp Tool ;RoHS Compliant: NA
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*