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| 型号： | AD8341 |
| 厂商： | Analog Devices, Inc. |
| 元件分类： | 调制器/解调器 |
| 英文描述： | 1.5 GHz to 2.4 GHz RF Vector Modulator |
| 中文描述： | 1.5 GHz至2.4 GHz射频矢量调制器 |
| 文件页数： | 12/20页 |
| 文件大小： | 556K |
| 代理商： | AD8341 |
AD8341
APPLICATIONS
USING THE AD8341
The AD8341 is designed to operate in a 50 impedance
system. Figure 30 illustrates an example where the RF input is
driven in a single-ended fashion while the differential RF out-
put is converted to a single-ended output with an RF balun. The
baseband controls for the I and Q channels are typically driven
from differential DAC outputs. The power supplies, VPRF and
VPS2, should be bypassed appropriately with 0.1 μF and 100 pF
capacitors. Low inductance grounding of the CMOP and CMRF
common pins is essential to prevent unintentional peaking of
the gain.
Rev. 0 | Page 12 of 20
RF INPUT AND MATCHING
The input impedance of the AD8341 is defined by the charac-
teristics of the polyphase network. The capacitive component of
the network causes its impedance to roll-off with frequency
albeit at a rate slower than 6 dB/octave. By using matching
inductors on the order of 1.2 nH in series with each of the RF
inputs, RFIP and RFIM, a 50 match is achieved with a return
loss of >10 dB over the operating frequency range. Different
matching inductors can improve matching over a narrower
frequency range. The single-ended and differential input
impedances are exactly the same.
0
50
100pF
RF
RFIM
RFIP
RC
PHASE
1.2nH
100pF 1.2nH
~1VDC
Figure 29. RF Input Interface to the AD8341 Showing
Coupling Capacitors and Matching Inductors
The RFIP and RFIM should be ac-coupled through low loss
series capacitors as shown in Figure 29. The internal dc levels
are at approximately 1 V. For single-ended operation, one input
is driven by the RF signal while the other input is ac grounded.
0
I
I
V
DSOP
CMOP
Q
Q
V
VPS2
VPRF
CMRF
RFIM
RFIP
CMOP
RFOM
RFOP
QFLP
Q
CMOP
CMOP
CMRF
VPRF
IFLP
I
AD8341
C12
(SEE TEXT)
C11
(SEE TEXT)
C8
0.1
μ
F
L3
1.2nH
C6
100pF
L4
1.2nH
C5
100pF
IBBM
IBBP
VP
RF
INPUT
VP
QBBP
QBBM
L1
120nH
L2
120nH
C14
0.1
μ
F
C10
0.1
μ
F
VP
C18
100pF
C17
100pF
ETC1-1-13
RF
OUTPUT
A
B
OUTPUT
DISABLE
VP
VP
C1
0.1
μ
F
C3
0.1
μ
F
C2
100pF
C7
100pF
C4
100pF
C9
100pF
Figure 30. Basic Connections
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8341ACP-REEL7 | 制造商:Analog Devices 功能描述:VECTOR MOD 230MHZ 24LFCSP EP - Tape and Reel |
| AD8341ACPZ-REEL7 | 功能描述:IC MOD VECT 1.5-2.4GHZ 24LFCSP RoHS:是 类别:RF/IF 和 RFID >> RF 调制器 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:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
| AD8341ACPZ-REEL72 | 制造商:AD 制造商全称:Analog Devices 功能描述:1.5 GHz to 2.4 GHz RF Vector Modulator |
| AD8341ACPZ-WP | 功能描述:IC MOD VECT 1.5-2.4GHZ 24LFCSP RoHS:是 类别:RF/IF 和 RFID >> RF 调制器 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:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
| AD8341ACPZ-WP1 | 制造商:AD 制造商全称:Analog Devices 功能描述:1.5 GHz to 2.4 GHz RF Vector Modulator |
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