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參數資料
| 型號： | AD8347-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator |
| 中文描述： | 0.8千兆赫- 2.7 GHz直接轉換正交解調器 |
| 文件頁數： | 14/20頁 |
| 文件大小： | 750K |
| 代理商： | AD8347-EVAL |
REV. 0
AD8347
–14–
less than
400
μ
A of supply current. The reference voltage (VREF)
of 1.0 V,
which serves as the common-mode reference for the
baseband circuits, is made available for external use.
OPERATING THE AD8347
Basic Connections
Figure 4 shows the basic connections for operating the AD8347.
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. While all of these pins should be connected to the same
supply voltage, each pin should be separately decoupled
using two
capacitors. 100 pF and 0.1
μ
F are recommended (values close
to these may also be used).
A supply voltage in the range 2.7 V to 5.5 V should be used. 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
μ
A when operating on a
5 V supply and 80
μ
A on a 2.7 V supply.
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. All of these
pins should be connected to the same low impedance ground.
RF Input and Matching
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
source, a 200
resistor may be connected
from the signal side of RFIP’s coupling capacitor to ground.
LO Drive Interface
For optimum performance the LO inputs, LOIN and LOIP,
should be driven differentially. M/A-COM balun, ETC1-1-13
is recommended. Unless an (ac-coupled) transformer is being
used to generate the differential LO, the inputs must be ac-coupled
as shown. To improve broadband matching to a 50
source, a
200
shunt resistor may be connected between LOIP and LOIN.
An LO drive level of –8 dBm is recommended. TPC 17a shows
the relationship between LO drive level, LO frequency, and
quadrature error for a typical device.
A single-ended drive is also possible as shown in Figure 5, but
this will slightly increase LO leakage. The LO signal should be
applied through a coupling capacitor to LOIP, and LOIN should
be ac-coupled to ground. Because the inputs are fully differen-
tial, the drive orientation can be reversed. As in the case of the
differential drive, a 200
resistor connected across LOIP and
LOIN improves the match to a 50
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
VREF
GAIN
CONTROL
INTERFACE
DET 2
VREF
VCMO
PHASE
SPLITTER
2
VCMO
VDT2
QMXO
QOPP
QOFS
C14
0.1 F
VAGC
VDT1
QAIN
760mV p-p
DIFFERENTIAL
(AGC MODE)
V
CM
= 1V
QOPP
QOPN
LO INPUT
–
8dBm
0.8GHz
–
2.7GHz
T1
ETC 1-1-13
(M/A-COM)
1
5
3
4
C4
100pF
R17
200
C3
100pF
760mV p-p
DIFFERENTIAL
(AGC MODE)
V
CM
= 1V
C10
100pF
C9
0.1 F
C8
100pF
C7
0.1 F
C6
0.1 F
C5
100pF
+V
S
(2.7V
–
5.5V)
RF INPUT
0.8GHz
–
2.7GHz
0dBm MAX
(AGC MODE)
C1
100pF
C2
100pF
R1
200
24mV p-p
(AGC MODE)
1V BIAS (VREF)
24mV p-p
(AGC MODE)
1V BIAS (VREF)
C13
0.1 F
IOPP
IOPN
C15
0.1 F
Figure 4. Basic Connections
相關PDF資料 |
PDF描述 |
|---|---|
| AD8347ARU | 0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator |
| AD8347ARU-REEL7 | 0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator |
| AD8348 | 50-1000 MHz Quadrature Demodulator |
| AD8348-EVAL | 50-1000 MHz Quadrature Demodulator |
| AD8348XXX | 50-1000 MHz Quadrature Demodulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 制造商全稱: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 類別:RF/IF 和 RFID >> RF 解調器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:解調器 LO 頻率:- RF 頻率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音數據:6.36dB 電流 - 電源:41.5mA 電源電壓:2.7 V 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| AD8348ARU-REEL7 | 功能描述:IC QUADRATUR DEMOD 50MHZ 28TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 解調器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:解調器 LO 頻率:- RF 頻率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音數據:6.36dB 電流 - 電源:41.5mA 電源電壓:2.7 V 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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