ADG904
器件描述：Wideband, 37 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
器件厂商：AD [Analog Devices]
文件大小：354.01KB，共16页
Sponsor by e络盟器件资料摘要：
Wideband, 37 dB Isolation at 1 GHz,
CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
ADG904/ADG904-R
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Wideband switch: –3 dB @ 2.5 GHz
ADG904: Absorptive 4:1 Mux/SP4T
ADG904-R: Reflective 4:1 Mux/SP4T
High off isolation (37 dB @ 1 GHz)
Low insertion loss (1.1 dB dc to 1 GHz)
Single 1.65 V to 2.75 V power supply
CMOS/LVTTL contol logic
20-lead TSSOP
Low power consumption (1 µA max)
APPLICATIONS
Wireless communications
General-purpose RF switching
Dual-band applications
High speed filter selection
Digital transceiver front end switch
IF switching
Tuner modules
Antenna diversity switching
FUNCTIONAL BLOCK DIAGRAMS
ADG904
50Ω
50Ω
50Ω
50Ω
1 OF 4 DECODER
RFC
A0 A1 EN
RF1
RF2
RF3
RF4
04504-0-001
ADG904-R
1 OF 4 DECODER
RFC
A0 A1 EN
RF1
RF2
RF3
RF4
04504-0-012
Figure 1 Figure 2
GENERAL DESCRIPTION
The ADG904/ADG904-R are wideband analog 4:1multiplexers
that use a CMOS process to provide high isolation and low
insertion loss to 1 GHz. The ADG904 is an absorptive/matched
mux with 50 Ω terminated shunt legs; the ADG904-R is a
reflective mux. These devices are designed such that the isola-
tion is high over the dc to 1 GHz frequency range.
The ADG904/ADG904-R switches one of four inputs to a
common output, RFC, as determined by the 3-bit binary
address lines A0, A1, and EN. A Logic 1 on the EN pin disables
the device.
The parts have on-board CMOS control logic, thus eliminating
the need for external control circuitry. The control inputs are
both CMOS and LVTTL compatible. The ADG904/ADG904-R’s
low power consumption makes them ideally suited for wireless
applications and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. –37 dB off isolation @ 1 GHz
2. 1.1 dB insertion loss @ 1 GHz
3. 20-lead TSSOP packages
04504-0-028FREQUENCY (Hz)
10G10k 100k 1M 10M 100M 1G
IN
SER
TION
LOSS (
d
B
)
–10
–20
–30
–40
–50
–60
–70
–80
V
DD
= 2.5V
S12
S21
04504-0-029FREQUENCY (Hz)
10G10k 100k 1M 10M 100M 1G
IN
SER
TION
LOSS (
d
B
)
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
–1.8
–1.9
–2.0
–2.1
–2.2
–2.3
–2.4
–2.5
–2.6
–2.7
–2.8
–2.9
–3.0
V
DD
= 2.5V
T
A
= 25°C
Figure 3. Off Isolation vs. Frequency Figure 4. Insertion Loss vs. Frequency
CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
ADG904/ADG904-R
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Wideband switch: –3 dB @ 2.5 GHz
ADG904: Absorptive 4:1 Mux/SP4T
ADG904-R: Reflective 4:1 Mux/SP4T
High off isolation (37 dB @ 1 GHz)
Low insertion loss (1.1 dB dc to 1 GHz)
Single 1.65 V to 2.75 V power supply
CMOS/LVTTL contol logic
20-lead TSSOP
Low power consumption (1 µA max)
APPLICATIONS
Wireless communications
General-purpose RF switching
Dual-band applications
High speed filter selection
Digital transceiver front end switch
IF switching
Tuner modules
Antenna diversity switching
FUNCTIONAL BLOCK DIAGRAMS
ADG904
50Ω
50Ω
50Ω
50Ω
1 OF 4 DECODER
RFC
A0 A1 EN
RF1
RF2
RF3
RF4
04504-0-001
ADG904-R
1 OF 4 DECODER
RFC
A0 A1 EN
RF1
RF2
RF3
RF4
04504-0-012
Figure 1 Figure 2
GENERAL DESCRIPTION
The ADG904/ADG904-R are wideband analog 4:1multiplexers
that use a CMOS process to provide high isolation and low
insertion loss to 1 GHz. The ADG904 is an absorptive/matched
mux with 50 Ω terminated shunt legs; the ADG904-R is a
reflective mux. These devices are designed such that the isola-
tion is high over the dc to 1 GHz frequency range.
The ADG904/ADG904-R switches one of four inputs to a
common output, RFC, as determined by the 3-bit binary
address lines A0, A1, and EN. A Logic 1 on the EN pin disables
the device.
The parts have on-board CMOS control logic, thus eliminating
the need for external control circuitry. The control inputs are
both CMOS and LVTTL compatible. The ADG904/ADG904-R’s
low power consumption makes them ideally suited for wireless
applications and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. –37 dB off isolation @ 1 GHz
2. 1.1 dB insertion loss @ 1 GHz
3. 20-lead TSSOP packages
04504-0-028FREQUENCY (Hz)
10G10k 100k 1M 10M 100M 1G
IN
SER
TION
LOSS (
d
B
)
–10
–20
–30
–40
–50
–60
–70
–80
V
DD
= 2.5V
S12
S21
04504-0-029FREQUENCY (Hz)
10G10k 100k 1M 10M 100M 1G
IN
SER
TION
LOSS (
d
B
)
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
–1.8
–1.9
–2.0
–2.1
–2.2
–2.3
–2.4
–2.5
–2.6
–2.7
–2.8
–2.9
–3.0
V
DD
= 2.5V
T
A
= 25°C
Figure 3. Off Isolation vs. Frequency Figure 4. Insertion Loss vs. Frequency