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參數資料
| 型號： | ADF7020BCP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | High Performance ISM Band FSK/ASK Transceiver IC |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC48 |
| 封裝： | 7 X 7 MM, LFCSP-48 |
| 文件頁數： | 14/40頁 |
| 文件大小： | 797K |
| 代理商： | ADF7020BCP |
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ADF7020
Preliminary Technical Data
TRANSMITTER
RF OUTPUT STAGE
Rev. PrH | Page 14 of 40
The PA of the ADF7020 is based on a single-ended, controlled
current, open-drain amplifier that has been designed to deliver
up to 13 dBm into a 50 load at a maximum frequency of
928 MHz.
The PA output current and, consequently, the output power are
programmable over a wide range. The PA configurations in
FSK/GFSK and ASK/OOK modulation modes are shown in
Figure 11 and Figure 12, respectively. In FSK/GFSK modulation
mode, the output power is independent of the state of the
DATA_IO pin. In ASK/OOK modulation mode, it is dependent
on the state of the DATA_IO pin and Bit R2_DB29, which
selects the polarity of the TxData input. For each transmission
mode, the output power can be adjusted as follows:
FSK/GFSK: The output power is set using bits
R2_DB(9:14).
ASK: The output power for the inactive state of the TxData
input is set by Bits R2_DB(15:20). The output power for the
active state of the TxData input is set by Bits R2_DB(9:14).
OOK: The output power for the active state of the TxData
input is set by Bits R2_DB(9:14). The PA is muted when the
TxData input is inactive.
IDAC
2
6
R2_DB(9:14)
R2_DB4
R2_DB5
DIGITAL
LOCK DETECT
R2_DB(30:31)
+
RFGND
RFOUT
FROM VCO
0
Figure 11. PA Configuration in FSK/GFSK Mode
IDAC
R2_DB(9:14)
R2_DB(15:23)
R2_DB4
R2_DB5
DIGITAL
LOCK DETECT
R2_DB(30:31)
R2_DB29
+
RFGND
RFOUT
FROM VCO
0
6
6
6
0
ASK/OOK MODE
DATA I/O
Figure 12. PA Configuration in ASK/OOK Mode
The PA is equipped with overvoltage protection, which makes it
robust in severe mismatch conditions. Depending on the
application, one can design a matching network for the PA to
exhibit optimum efficiency at the desired radiated output power
level for a wide range of different antennas, such as loop or
monopole antennas. See the LNA/PA Matching section for
details.
PA Bias Currents and Mute PA until Lock Bit
Control Bits R2_DB(30:31) facilitate an adjustment of the PA
bias current to further extend the output power control range, if
necessary. If this feature is not required, the default value of
7 μA is recommended. The output stage is powered down by
resetting Bit R2_DB4. To reduce the level of undesired spurious
emissions, the PA can be muted during the PLL lock phase by
setting Bit R2_DB5 (mute PA until lock bit).
MODULATION SCHEMES
Frequency Shift Keying (FSK)
Frequency shift keying is implemented by setting the N value
for the center frequency and then toggling this with the TxData
line. The deviation from the center frequency is set using Bits
R2_DB(15:23). The deviation from the center frequency in Hz
is
14
2
Hz]
[
Number
Modulation
PFD
FSK
DEVIATION
×
=
where
Modulation Number
is a number from 1 to 511
(R2_DB(15:23)) .
Select FSK using Bits R2_DB(6:8).
0
VCO
÷
N
THIRD-ORDER
Σ
-
MODULATOR
PFD/
CHARGE
PUMP
4R
INTEGER-N
FRACTIONAL-N
PA STAGE
–F
DEV
+F
DEV
TxDATA
FSK DEVIATION
FREQUENCY
Figure 13. FSK Implementation
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| ADF7020BCP-REEL | 制造商:Analog Devices 功能描述:RF TRNSCVR ASK/FSK 2.5V/3.3V 48LFCSP EP - Tape and Reel |
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| ADF7020BCP-U1 | 制造商:Analog Devices 功能描述:HIGH PERFORMANCE ISM BAND FSK/ASK TRANSCEIVER IC - Trays |
| ADF7020BCPZ | 功能描述:IC TX FSK/ASK ISM BAND 48LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 收發器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數據傳輸率 - 最大:54Mbps 調制或協議:* 應用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
| ADF7020BCPZ-RL | 功能描述:IC TX FSK/ASK ISM BAND 48LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 收發器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數據傳輸率 - 最大:54Mbps 調制或協議:* 應用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
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