- 您現在的位置：買賣IC網 > PDF目錄373944 > AD8343 (Analog Devices, Inc.) DC-to-2.5 GHz High IP3 Active Mixer PDF資料下載
參數資料
| 型號： | AD8343 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | DC-to-2.5 GHz High IP3 Active Mixer |
| 中文描述： | DC至2.5GHz的高IP3有源混頻器 |
| 文件頁數： | 21/27頁 |
| 文件大小： | 394K |
| 代理商： | AD8343 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁
REV. 0
AD8343
–21–
R1A and R1B set the core bias current of 18.5 mA per side. L1A
and L1B provide the RF choking required to avoid shunting the
signal. Z1, Z2A, and Z2B comprise a typical input matching net-
work that is designed to match the AD8343
’
s differential input
impedance to the differential output impedance of the balun.
The IF output is taken through a 4:1 (impedance ratio) trans-
former that reflects a 200
differential load to the collectors.
This output coupling arrangement is reasonably broadband,
although in some cases the user might want to consider adding a
resonator tank circuit between the collectors to provide a mea-
sure of IF selectivity. The ferrite bead (FB), in series with the
output transformer
’
s center tap, addresses the common-mode
stability concern.
In this circuit the PWDN pin is shown connected to GND,
which enables the mixer. In order to enter power-down mode
and conserve power, the PWDN pin should be taken within
500 mV of VPOS.
The DCPL pin should be bypassed to GND with about 0.1
μ
F.
Failure to do so could result in a higher noise level at the output
of the device.
Upconverting Mixer
A typical upconversion application is shown in Figure 22. Both
the input and output single-ended-to-differential conversions
are obtained through the use of 1:1 transmission line baluns.
The differential input and output matching networks are designed
between the balun and the I/O pins of the AD8343. The local
oscillator signal at a level of
–
12 dBm to
–
3 dBm is brought in
through a third 1:1 balun.
R1A and R1B set the core bias current of 18.5 mA per side. Z1,
Z2A, and Z2B comprise a typical input matching network that
is designed to match the AD8343
’
s differential input impedance
to the differential output impedance of the balun. It was assumed
for this example that the input frequency is low and that the
magnitude of the device
’
s input impedance is therefore much
smaller than the bias resistor values, allowing the input bias
inductors to be eliminated with very little penalty in gain or
noise performance.
In this example, the output signal is taken via a differential
matching network comprising Z3 and Z4A/B, then through the
1:1 balun and dc blocking capacitors to the single-ended output.
The output frequency is assumed to be high enough that conju-
gate matching to the output of the AD8343 is desirable, so the
goal of the matching network is to provide a conjugate match
between the device
’
s output and the differential input of the
output balun.
This circuit uses shunt feed to provide collector bias for the
transistors because the output balun in this circuit has no con-
venient center-tap. The ferrite beads, in series with the output
’
s
bias inductors, provide some small degree of damping to ease
the common-mode stability problem. Unfortunately this type of
output balun may present a common-mode load that enters the
region of output instability, so most of the burden of avoiding
overt instability falls on the input circuit, which should present
an inductive common-mode termination over as broad a band of
frequencies as possible.
The PWDN pin is shown as tied to GND, which enables the
mixer. The DCPL pin should be bypassed to GND with about
0.1
μ
F in order to bypass noise from the internal bias circuit.
RF
OUT
R1
A
R
FIN
R1
B
0.1 F
V
POS
LO IN
V
POS
0.1 F
AD8343
VPOS
DCPL
PWDN
LOIP
LOIM
INPP
INPM
OUTM
OUTP
COMM
BIAS
V
POS
Z2
A
Z2
B
0.1 F
0.1 F
Z1
FB
Z3
Z4
A
FB
Z4
B
Figure 22. Typical Upconversion Application
相關PDF資料 |
PDF描述 |
|---|---|
| AD8343-EVAL | DC-to-2.5 GHz High IP3 Active Mixer |
| AD8343ARU | DC-to-2.5 GHz High IP3 Active Mixer |
| AD8343ARU-REEL7 | DC-to-2.5 GHz High IP3 Active Mixer |
| AD8344 | Active Receive Mixer 400 MHz to 1.2 GHz |
| AD8344-EVAL | Active Receive Mixer 400 MHz to 1.2 GHz |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8343(14SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| AD8343(14TSSOP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| AD8343ARU | 制造商:Analog Devices 功能描述:Up/Down Conv Mixer 5V 2.4GHz 14-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:IC, 800-2500MHZ HIGH IP3 ACTIVE MIXER - Bulk 制造商:Analog Devices 功能描述:High-performance active mixer 14TSSOP Tube 制造商:Analog Devices 功能描述:IC ACTIVE MIXER HIGH IP3 |
| AD8343ARU-REEL | 制造商:Analog Devices 功能描述:Up/Down Conv Mixer 5V 2.4GHz 14-Pin TSSOP T/R 制造商:Analog Devices 功能描述:UP/DOWN CONV MIXER 5V 2.4GHZ 14TSSOP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:TSSOP 800-2500MHZ HIGH IP3 ACTIVE MIXER - Tape and Reel |
| AD8343ARU-REEL7 | 制造商:Analog Devices 功能描述:Up/Down Conv Mixer 5V 2.4GHz 14-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述:IC ACTIVE MIXER HIGH IP3 |
發布緊急采購，3分鐘左右您將得到回復。