參數(shù)資料
型號(hào): ADG904BRU-REEL
廠商: ANALOG DEVICES INC
元件分類: 運(yùn)動(dòng)控制電子
英文描述: Wideband, 37 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
中文描述: 4-CHANNEL, SGL ENDED MULTIPLEXER, PDSO20
封裝: MO-153AC, TSSOP-20
文件頁數(shù): 11/16頁
文件大小: 354K
代理商: ADG904BRU-REEL
ADG904/ADG904-R
APPLICATIONS
The ADG904/ADG904-R are ideal solutions for low power,
high frequency applications. The low insertion loss, high
isolation between ports, low distortion, and low current
consumption of these parts make them excellent solutions for
many high frequency switching applications. They may be used
in applications such as switchable filters, transmitters and
receivers for radar systems, and communication systems from
base stations to cell phones.
Rev. 0 | Page 11 of 16
The ADG9xx wideband switches are designed to meet the
demands of devices transmitting at ISM band frequencies to
1 GHz and higher. The low insertion loss, high isolation
between ports, single pin control interface, no requirement for
dc blocking capacitors, and TTL interface compatibility make
them cost effective and easy to integrate switching solutions for
many high frequency switching applications and low power
applications where the parts can handle up to 16 dBm of power.
ABSORPTIVE VS. REFLECTIVE
The ADG904 is an absorptive (matched) switch with 50
terminated shunt legs; the ADG904-R is a reflective switch with
0 terminated shunts to ground. The ADG904 absorptive
switch has a good VSWR on each port, regardless of the switch
mode. An absorptive switch should be used when there is a
need for a good VSWR that is looking into the port but not
passing the through signal to the common port. The ADG904 is
therefore ideal for applications that require minimum
reflections back to the RF source. It also ensures that the
maximum power is transferred to the load.
The ADG904-R reflective switch is suitable for applications
where high off port VSWR does not matter and the switch has
some other desired performance feature. It can be used in many
applications, including high speed filter selection. In most cases,
an absorptive switch can be used instead of a reflective switch,
but not vice versa.
ANTENNA DIVERSITY SWITCH
The ADG904 is ideal for use as an antenna diversity switch,
switching in different antennas to the tuner. The low insertion
loss ensures minimum signal loss and high isolation between
channels, making these SP4T switches suitable for switching
applications in tuner modules and set-top boxes.
TUNER
ADG904
CABLE
RF1
RF2
RF3
RF4
VGA
ANTENNA
0
Figure 26. Tuner Modules
FILTER SELECTION
The ADG904 can be used to switch high frequency signals
between different filters, and to multiplex the signal to the
output. These SP4T switches are also ideal for high speed signal
routing.
RF
OUT
RFC
ADG904
ADG904
RF1
RF2
RF3
RF4
RF1
RF2
RF3
RF4
RF
IN
RFC
0
Figure 27. Filter Selection
Tx/Rx SWITCHING
The low insertion loss and high isolation between ports ensures
that the ADG904/ADG904-R is a suitable transmit/receive
switch for all ISM band and WirelessLAN, providing the
required isolation between the transmit and receive signals.
ADG904
Tx
Rx
Rx
Rx
Rx
ANTENNA
0
Figure 28. Tx/Rx Switching
相關(guān)PDF資料
PDF描述
ADG904BRU-REEL7 Wideband, 37 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
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