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參數(shù)資料
| 型號(hào)： | ADF7901BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 無(wú)繩電話/電話 |
| 英文描述： | High Performance ISM Band ASK/FSK Transmitter IC |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO24 |
| 封裝： | MO-153AD, TSSOP-24 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 285K |
| 代理商： | ADF7901BRU |
ADF7901
Preliminary Technical Data
Rev. PrD | Page 10 of 12
3pF
8pF
22nH
27nH
5.6pF
DVDD
RFOUT
RSET
3.6k
CREG2
2.2mF
220nF
CVCO
CPOUT
VCOIN
VCOIN
FSK1
FSK2
FSK3
OOK_SEL
TxDATA
CE
9.8304MHz
33pF
33pF
GND
OSC2
OSC1
ANTENNA
ADF7901
PA_EN
RSET_FSK
RSET_OOK
3.6k
3.6k
CREG1
2.2mF
3pF
1.5pF
22nH
36nH
MATCHING 50 V
TO ANTENNA
5TH ORDER LOW PASS FILTER
MATCHING RFOUT TO 50V
0
NOTES
1. DECOUPLING CAPACITORS HAVE
BEEN OMITTED FOR CLARITY.
Figure 8. Applications Diagram for the ADF7901 in a Remote Control System
LAYOUT GUIDELINES
The layout of the board is crucial to ensuring low levels of
spurious and harmonics.
Decoupling
Decoupling capacitors (high frequency 22 pF, low frequency
100 nF) should be placed as close as possible to the supply pins
on the part. Low size 0402 and 0603 components are recom-
mended for the high frequency rejection on the supply.
Regulator Stability
A minimum of 1 μF is needed on both C
REG1
and C
REG2
to ensure
stability. An additional 22 pF capacitor can be added to reject
higher frequency noise. Since many of the internal block run off
the regulator it is critical to reduce the noise on this. Low size
0402 and 0603 components are recommended for the high
frequency rejection on the supply.
Grounding
Emphasis should be placed on the grounding once the
decoupling capacitors have been added. The PA stage switches
currents of 15 mA in max power mode. This will cause changes
in the ground resulting in large return currents which can
radiate to other parts of the board. The shortest and least
obstructed ground from RFGND back to the ground of the
battery should be ensured. A 4-layer board will help, as well as
flooding of the top layer. The ground paths should not have any
vias, and should be wide tracks.
Supply
The supply tracks can be routed through vias, as these act as
free inductors on the board and make layout easier on a 2-layer
board. See the Decoupling section. Tracks should be wide.
Digital Lines
Any digital lines should contain a large resistor in series. This
impedance will block signals of many frequencies including
harmonics and the carrier frequency. Long control lines can act
as an antenna. It can be useful to add capacitance to ground.
There will be some capacitance to ground provided by the lines,
and at the input of the digital pins.
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| ADF7901BRU-REEL | 制造商:Analog Devices 功能描述:RF Transmitter FSK/OOK 3V 24-Pin TSSOP T/R 制造商:Analog Devices 功能描述:RF TRANSMITTER FSK/OOK 3V 24TSSOP - Tape and Reel |
| ADF7901BRU-REEL7 | 制造商:Analog Devices 功能描述:RF Transmitter FSK/OOK 3V 24-Pin TSSOP T/R 制造商:Analog Devices 功能描述:RF TRANSMITTER FSK/OOK 3V 24TSSOP - Tape and Reel |
| ADF7901BRUZ | 功能描述:IC XMITTER OOK/FSK ISM 24TSSOP RoHS:是 類(lèi)別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特點(diǎn):- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ADF7901BRUZ1 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:High Performance ISM Band OOK/FSK Transmitter IC |
| ADF7901BRUZ-RL | 功能描述:IC XMITTER OOK/FSK ISM 24TSSOP RoHS:是 類(lèi)別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特點(diǎn):- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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