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參數(shù)資料
| 型號： | T5750-6AQ |
| 廠商： | ATMEL CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | UHF ASK/FSK TRANSMITTER |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO8 |
| 封裝： | TSSOP-8 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 212K |
| 代理商： | T5750-6AQ |
3
T5750 [Preliminary]
4546B–RKE–07/04
Figure 3.
Block Diagram
General Description
This fully integrated PLL transmitter allows particularly simple, low-cost RF miniature
transmitters to be assembled. The VCO is locked to 64
×
f
XTAL
hence a 13.5672 MHz
crystal is needed for a 868.3 MHz transmitter and a 14.2969 MHz crystal for a 915 MHz
transmitter. All other PLL and VCO peripheral elements are integrated.
The XTO is a series resonance oscillator so that only one capacitor together with a
crystal connected in series to GND are needed as external elements.
The crystal oscillator together with the PLL needs typically <1 ms until the PLL is locked
and the CLK output is stable. There is a wait time of
≥
4 ms must be used until the CLK
is used for the microcontroller and the PA is switched on.
The power amplifier is an open-collector output delivering a current pulse which is nearly
independent from the load impedance. The delivered output power is hence controllable
via the connected load impedance.
This output configuration enables a simple matching to any kind of antenna or to 50
. A
high power efficiency of
η
= P
out
/(I
S,PA
×
V
S
) of 24% for the power amplifier at 868.3 MHz
results when an optimized load impedance of Z
Load
= (166 + j226)
is used at 3 V sup-
ply voltage.
CLK
PA_ENABLE
ANT2
ANT1
ENABLE
8
GND
7
VS
6
XTAL
5
1
2
3
4
VCO
LF
CP
f
64
XTO
PLL
PA
f
4
Power up / down
T5750
PFD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T5750-6AQJ | 功能描述:射頻發(fā)射器 ASK/FSK Transmitter 868 - 928 MHz RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| T5750-6AQJ 71 | 制造商:Atmel Corporation 功能描述:UHF ASK/FSK TRANSMITTER |
| T5750-6AQJ 71 | 制造商:Atmel Corporation 功能描述:UHF ASK/FSK TRANSMITTER - Tape and Reel |
| T5750-6AQJ-66 | 功能描述:射頻發(fā)射器 UHF ASK/FSK Trnsmttr RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| T5750-6AQJ71 | 功能描述:射頻發(fā)射器 UHF ASK/FSK Transmitter RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
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