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| 型号： | AD8347ARUZ-REEL7 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 调制器/解调器 |
| 英文描述： | 800 MHz - 2700 MHz RF/MICROWAVE QUADRAPHASE DEMODULATOR |
| 封装： | MO-153AE, RU-28, TSSOP-28 |
| 文件页数： | 1/28页 |
| 文件大小： | 623K |
| 代理商： | AD8347ARUZ-REEL7 |
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0.8 GHz to 2.7 GHz Direct Conversion
Quadrature Demodulator
AD8347
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Integrated RF and baseband AGC amplifiers
RFIN
VREF
RFIP
VPS2
IMXO
COM3
IOPP
IOFS
IOPN
VCMO
VPS1
LOIN
IAIN
COM2
VDT2
QMXO
QOPP
QOFS
QOPN
VAGC
COM3
VGIN
ENBL
LOIP
COM1
VDT1
QAIN
VPS3
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD8347
PHASE
SPLITTER
PHASE
SPLITTER
GAIN
CONTROL
BIAS
DET
02675-001
Quadrature phase accuracy 1° typ
I/Q amplitude balance 0.3 dB typ
Third-order intercept (IIP3) +11.5 dBm @ min gain
Noise figure 11 dB @ max gain
AGC range 69.5 dB
Baseband level control circuit
Low LO drive 8 dBm
ADC-compatible I/Q outputs
Single supply 2.7 V to 5.5 V
Power-down mode
28-lead TSSOP package
APPLICATIONS
Figure 1.
Cellular base stations
Radio links
Wireless local loop
IF broadband demodulators
RF instrumentation
Satellite modems
GENERAL DESCRIPTION
Baseband level detectors are included for use in an AGC loop to
maintain the output level. The demodulator dc offsets are
minimized by an internal loop, whose time constant is
controlled by external capacitor values. The offset control can
also be overridden by forcing an external voltage at the offset
nulling pins.
The AD83471 is a broadband direct quadrature demodulator
with RF and baseband automatic gain control (AGC) amplifiers.
It is suitable for use in many communications receivers, performing
quadrature demodulation directly to baseband frequencies. The
input frequency range is 800 MHz to 2.7 GHz. The outputs can
be connected directly to popular A-to-D converters such as the
The baseband variable gain amplifier outputs are brought off-
chip for filtering before final amplification. By inserting a
channel selection filter before each output amplifier, high level
out-of-channel interferers are eliminated. Additional internal
circuitry also allows the user to set the dc common-mode level
at the baseband outputs.
The RF input signal goes through two stages of variable gain
amplifiers prior to two Gilbert-cell mixers. The LO quadrature
phase splitter employs polyphase filters to achieve high
quadrature accuracy and amplitude balance over the entire
operating frequency range. Separate I and Q channel variable
gain amplifiers follow the baseband outputs of the mixers. The
RF and baseband amplifiers together provide 69.5 dB of gain
control. A precision control circuit sets the linear-in-dB RF gain
response to the gain control voltage.
1 U.S. patents issued and pending.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8347-EVAL | 制造商:Analog Devices 功能描述:EVALUATION BOARD ((NS)) |
| ad8347-evalz | 制造商:Analog Devices 功能描述:EVAL BD 0.8 GHZ TO 2.7 GHZ DIRECT CONVERSION QUADRATURE DEMO - Bulk |
| AD8348 | 制造商:AD 制造商全称:Analog Devices 功能描述:400 MHz to 6 GHz Broadband Quadrature Modulator |
| AD8348ARE | 制造商:Analog Devices 功能描述:QUADRATURE MODULATOR - Rail/Tube |
| AD8348ARU | 功能描述:IC QUADRATUR DEMOD 50MHZ 28TSSOP RoHS:否 类别:RF/IF 和 RFID >> RF 解调器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:解调器 LO 频率:- RF 频率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音数据:6.36dB 电流 - 电源:41.5mA 电源电压:2.7 V 封装/外壳:28-WFQFN 裸露焊盘 供应商设备封装:28-TQFN-EP（5x5） 包装:带卷 (TR) |
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