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参数资料
| 型号： | AD8347ARUZ |
| 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： | 10/28页 |
| 文件大小： | 623K |
| 代理商： | AD8347ARUZ |
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AD8347
Rev. A | Page 18 of 28
APPLICATIONS
BASIC CONNECTIONS
RF INPUT AND MATCHING
The basic connections for operating the AD8347 are shown in
The RF input signal should be ac-coupled into the RFIP pin and
RFIN should be ac-coupled to ground. To improve broadband
matching to a 50 Ω source, a 200 Ω resistor can be connected
from the signal side of the RFIP coupling capacitor to ground.
Figure 46. The device is powered through three power supply
pins: VPS1, VPS2, and VPS3. These pins supply current to
different parts of the overall circuit. VPS1 and VPS2 power the
local oscillator (LO) and RF sections, respectively, while VPS3
powers the baseband amplifiers. Connect all of these pins to the
same supply voltage; however, separately decouple each pin
using two capacitors. 100 pF and 0.1 μF capacitors are
recommended, though values close to these can be used.
LO DRIVE INTERFACE
For optimum performance, the LO inputs, LOIN and LOIP,
should be driven differentially; the M/A-COM balun, ETC1-1-13
is recommended. Unless an ac-coupled transformer is used to
generate the differential LO, the inputs must be ac-coupled, as
shown in
Use a supply voltage in the range 2.7 V to 5.5 V. The quiescent
current is 64 mA when operating from a 5 V supply. By pulling
the ENBL pin low, the device goes into its power-down mode.
The power-down current is 400 μA when operating on a 5 V
supply and 80 μA on a 2.7 V supply.
Figure 46. To improve broadband matching to a 50 Ω
source, connect a 200 Ω shunt resistor between LOIP and LOIN.
A LO drive level of 8 dBm is recommended. Figure 20 shows
the relationship between LO drive level, LO frequency, and
quadrature error for a typical device.
Like the supply pins, the individual sections of the circuit are
separately grounded. COM1, COM2, and COM3 provide
ground for the LO, RF, and baseband sections, respectively.
Connect all of these pins to the same low impedance ground.
A single-ended drive is also possible as shown in
, but
this slightly increases LO leakage. Apply the LO signal through
a coupling capacitor to LOIP, and ac-couple LOIN to ground.
Because the inputs are fully differential, the drive orientation
can be reversed. As in the case of the differential drive, a 200 Ω
resistor connected across LOIP and LOIN improves the match
to a 50 Ω source.
RFIN
VREF
RFIP
VPS2
IMXO
COM3
IOPP
IOFS
IOPN
VCMO
VPS1
LOIN
IAIN
COM2
QOPN
COM3
VGIN
ENBL
LOIP
COM1
VPS3
AD8347
PHASE
SPLITTER
1
BIAS
CELL
DET 1
VREF
GAIN
CONTROL
INTERFACE
DET 2
VREF
VCMO
PHASE
SPLITTER
2
VCMO
VDT2
QMXO
QOPP
QOFS
VAGC
VDT1
QAIN
760mV p-p
DIFFERENTIAL
(AGC MODE)
VCM = 1V
QOPP
QOPN
LO INPUT
–8dBm
0.8GHz–2.7GHz
T1
ETC 1-1-13
(M/A-COM)
15
3
4
C4
100pF
R17
200
Ω
C3
100pF
760mV p-p
DIFFERENTIAL
(AGC MODE)
VCM = 1V
C10
100pF
C9
0.1
μF
C8
100pF
C7
0.1
μF
C6
0.1
μF
C5
100pF
+VS
(2.7V–5.5V)
RF INPUT
0.8GHz–2.7GHz
0dBm MAX
(AGC MODE)
C1
100pF
C2
100pF
R1
200
Ω
C14
0.1
μF
24mV p-p
(AGC MODE)
1V BIAS (VREF)
24mV p-p
(AGC MODE)
1V BIAS (VREF)
C13
0.1
μF
IOPP
IOPN
C15
0.1
μF
02675-
046
4
6
13
8
14
21
12
2
15
10
11
17
20
19
18
22
16
24
25
26
27
23
9
7
1
28
5
3
C16
0.1
μF
Figure 46. Basic Connections
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8347ARUZ | 制造商:Analog Devices 功能描述:IC QUAD DEMODULATOR 0.8-2.7GHZ 28-TSSOP |
| AD8347ARUZ-REEL7 | 功能描述:IC QUADRATURE DEMOD 28-TSSOP TR RoHS:是 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) |
| 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 |
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