欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號(hào): ADL5390
廠商: Analog Devices, Inc.
英文描述: RF/IF Vector Multiplier
中文描述: 射頻中頻向量乘法器/
文件頁(yè)數(shù): 13/24頁(yè)
文件大小: 716K
代理商: ADL5390
ADL5390
RF OUTPUT AND MATCHING
The RF/IF outputs of the ADL5390, RFOP and RFOM, are open
collectors of a transimpedance amplifier that need to be pulled
up to the positive supply, preferably with RF chokes, as shown
in Figure 30. The nominal output impedance looking into each
individual output pin is 25 . Consequently, the differential
output impedance is 50 .
Rev. 0 | Page 13 of 24
0
50
DIFFERENTIAL
10pF
1:1
RF
OUTPUT
RFOM
RFOP
R
T
R
T
120nH
10pF
V
P
G
M
±I
SIG
0.1
μ
F
Figure 30. RF Output Interface to the ADL5390 Showing
Coupling Capacitors, Pull-Up RF Chokes, and Balun
Since the output dc levels are at the positive supply, ac-coupling
capacitors are usually needed between the ADL5390 outputs
and the next stage in the system.
A 1:1 RF broadband output balun, such as the ETC1-1-13 (M/A-
COM), converts the differential output of the ADL5390 into a
single-ended signal. Note that the loss and balance of the balun
directly impact the apparent output power, noise floor, and gain/
phase errors of the ADL5390. In critical applications, narrow-band
baluns with low loss and superior balance are recommended.
If the output is taken in a single-ended fashion directly into a 50
load through a coupling capacitor, there will be an impedance
mismatch. This can be resolved with a 1:2 balun to convert the
single-ended 25 output impedance to 50 . If loss of signal
swing is not critical, a 25 back termination in series with the
output pin can also be used. The unused output pin must still be
pulled up to the positive supply. The user may load it through a
coupling capacitor with a dummy load to preserve balance. The
mismatched gain of the ADL5390 when the output is single-
ended varies slightly with dummy load value, as shown in Figure
31.
10
–10
–4
–2
0
2
4
6
8
10
100
1000
10000
0
FREQUENCY (MHz)
G
R
L2
= OPEN
R
L2
= 50
R
L2
= SHORT
R
L
= 50
Figure 31. Gain of the ADL5390 Using a Single-Ended Output with Different
Dummy Loads, R
L2
on the Unused Output, Gain Setpoint = 1.0
The RF output signal can be disabled by raising the DSOP pin
to the positive supply. The output disable function provides
>40 dB attenuation of the input signal, even at full gain. The
interface to DSOP is high impedance and the output disable
and output enable response times are <100 ns. If the output
disable function is not needed, the DSOP should be tied to
ground.
DRIVING THE I-Q BASEBAND GAIN CONTROLS
The I and Q gain control inputs to the ADL5390 set the gain for
each channel. These inputs are differential and should normally
have a common-mode level of 0.5 V. However, when differen-
tially driven, the common mode can vary from 250 mV to
750 mV while still allowing full gain control. Each input pair
has a nominal input swing of ±0.5 V differential around the
common-mode level. The maximum gain is achieved if the
differential voltage is equal to +500 mV or 500 mV. So with a
common-mode level of 500 mV, IBBP and IBBM will each
swing between 250 mV and 750 mV.
The I and Q gain control inputs can also be driven with a single-
ended signal. In this case, one side of each input should be tied
to a low noise 0.5 V voltage source (a 0.1 μF decoupling capaci-
tor located close to the pin is recommended), while the other
input swings from 0 V to 1 V. Low speed, single-ended drive can
easily be achieved using 12-bit voltage output DACs such as
AD8303 (serial SPI interface) or AD8582 (parallel interface)
DACs. A reference voltage should also be supplied. Differential
drive generally offers superior even-order distortion and lower
noise than single-ended drive.
The bandwidth of the baseband controls exceeds 200 MHz even
at full-scale baseband drive. This allows for very fast gain modu-
lation of the RF input signal. In cases where lower modulation
bandwidths are acceptable or desired, external filter capacitors
can be connected across Pins IFLP to IFLM and Pins QFLP to
QFLM to reduce the ingress of baseband noise and spurious
signal into the control path.
相關(guān)PDF資料
PDF描述
ADL5391 DC to 2.0 GHz Multiplier
ADL5391ACPZ-R2 DC to 2.0 GHz Multiplier
ADL5391ACPZ-R7 DC to 2.0 GHz Multiplier
ADL5391ACPZ-WP DC to 2.0 GHz Multiplier
ADL5391-EVALZ DC to 2.0 GHz Multiplier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADL5390ACPZ 制造商:Analog Devices 功能描述:RF/IF VECTOR MLTPLR 24LFCSP - Tape and Reel 制造商:Analog Devices 功能描述:RF VECTOR MULTIPLIER 2.3GHZ SMD 制造商:Analog Devices 功能描述:RF Vector Multiplier,wideband,ADL5390
ADL5390ACPZ-REEL7 功能描述:IC MULTIPLIER VECTOR 24LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:- 標(biāo)準(zhǔn)包裝:100 系列:*
ADL5390ACPZ-REEL71 制造商:AD 制造商全稱:Analog Devices 功能描述:RF/IF Vector Multiplier
ADL5390ACPZ-WP 功能描述:IC MULTIPLIER RF VECTOR 24-LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:- 標(biāo)準(zhǔn)包裝:100 系列:*
ADL5390ACPZ-WP1 制造商:AD 制造商全稱:Analog Devices 功能描述:RF/IF Vector Multiplier
主站蜘蛛池模板: 炉霍县| 云南省| 新巴尔虎右旗| 叶城县| 门源| 西乌珠穆沁旗| 景洪市| 淮北市| 杭锦后旗| 延边| 都江堰市| 民勤县| 凉城县| 思南县| 宁南县| 永济市| 博客| 镇坪县| 朝阳市| 酉阳| 龙海市| 青州市| 华蓥市| 罗平县| 赤城县| 淳化县| 北安市| 女性| 兴文县| 江门市| 璧山县| 昂仁县| 大兴区| 永泰县| 泰来县| 含山县| 华阴市| 常德市| 吉木乃县| 江永县| 上饶县|