Wideband 2.5 GHz, 37 dB Isolation at 1 GHz,
CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
ADG904/ADG904-R
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
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 control logic
20-lead TSSOP and 4 mm × 4 mm LFCSP packages
Low power consumption (1 μA maximum)
Qualified for automotive applications
ADG904
ADG904-R
RF1
RF1
50
RF2
RF2
50
RF3
RF3
50
APPLICATIONS
A0
−37 dB off isolation @ 1 GHz
2.
1.1 dB insertion loss @ 1 GHz
3.
20-lead TSSOP/LFCSP packages
INSERTION LOSS (dB)
S12
10M
100M
FREQUENCY (Hz)
1G
10G
04504-0-028
INSERTION LOSS (dB)
S21
–60
Figure 3. Off Isolation vs. Frequency
Rev. C
EN
Figure 2.
1.
–20
–50
A1
PRODUCT HIGHLIGHTS
VDD = 2.5V
–40
A0
The parts have on-board CMOS control logic, which eliminates
the need for external control circuitry. The control inputs
are both CMOS and LVTTL compatible. The low power
consumption of these devices makes them ideally suited
for wireless applications and general-purpose high
frequency switching.
–10
–30
1 OF 4 DECODER
–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 VDD = 2.5V
–2.9 TA = 25°C
–3.0
10k
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
04504-0-029
The ADG904 and ADG904-R switch 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.
1M
EN
Figure 1.
The ADG904 and ADG904-R are wideband analog 4:1
multiplexers 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 isolation is high over the dc to 1 GHz frequency range.
100k
A1
04504-0-012
1 OF 4 DECODER
04504-0-001
50
GENERAL DESCRIPTION
–80
10k
RF4
RF4
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
–70
RFC
RFC
Figure 4. Insertion Loss vs. Frequency
Document Feedback
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Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADG904/ADG904-R
Data Sheet
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absorptive vs. Reflective ........................................................... 11
Absolute Maximum Ratings ............................................................ 4
Antenna Diversity Switch .......................................................... 11
ESD Caution .................................................................................. 4
Filter Selection ............................................................................ 11
Pin Configurations and Function Descriptions ........................... 5
Tx/Rx Switching ......................................................................... 11
Terminology ...................................................................................... 6
Evaluation Board ............................................................................ 12
Typical Performance Characteristics ............................................. 7
Outline Dimensions ....................................................................... 13
Test Circuits ....................................................................................... 9
Ordering Guide .......................................................................... 14
Applications ..................................................................................... 11
Automotive Products ................................................................. 14
REVISION HISTORY
/13—Rev. B to Rev. C
Changes to Features Section............................................................ 1
Changes to Figure 6 .......................................................................... 5
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 14
Added Automotive Product Section ............................................ 14
2/07—Rev. A to Rev. B
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 14
8/05—Rev. 0 to Rev. A
Added LFCSP Package ....................................................... Universal
Changes to Specifications ................................................................ 3
Changes to Absolute Maximum Ratings ....................................... 4
Inserted New Figure 6 ...................................................................... 5
Changes to Table 4 ............................................................................ 5
Changes to Outline Dimensions................................................... 13
Changes to Ordering Guide .......................................................... 14
4/04—Revision 0: Initial Version
Rev. C | Page 2 of 16
Data Sheet
ADG904/ADG904-R
SPECIFICATIONS
VDD = 1.65 V to 2.75 V, GND = 0 V, Input Power = 0 dBm, all specifications TMIN to TMAX, unless otherwise noted. 1
Table 1.
Parameter
AC ELECTRICAL CHARACTERISTICS
Operating Frequency 3
3 dB Frequency 4
Input Power4
Symbol
Conditions
0 V dc bias
0.5 V dc bias
DC to 100 MHz; VDD = 2.5 V ± 10%
500 MHz; VDD = 2.5 V ± 10%
1000 MHz; VDD = 2.5 V ± 10%
100 MHz
500 MHz
1000 MHz
100 MHz
500 MHz
1000 MHz
DC to 100 MHz
500 MHz
1000 MHz
DC to 100 MHz
500 MHz
1000 MHz
50% EN to 90% RF
S21, S12
Isolation—RFC to RF1–RF4
S21, S12
Crosstalk
S21, S12
Return Loss (On Channel)4
S11, S22
Return Loss (Off Channel)4
S11, S22
On Switching Time4
tON (EN)
Off Switching Time
tOFF (EN)
50% EN to 10% RF
tTRANS
tRISE
tFALL
P–1 dB
IP3
50% Ax to 10% RF
10% to 90% RF
90% to 10% RF
1000 MHz
900 MHz/901 MHz, 4 dBm
VINH
VINH
VINL
VINL
II
VDD = 2.25 V to 2.75 V
VDD = 1.65 V to 1.95 V
VDD = 2.25 V to 2.75 V
VDD = 1.65 V to 1.95 V
0 ≤ VIN ≤ 2.75 V
CRF ON
C
f = 1 MHz
f = 1 MHz
IDD
Digital inputs = 0 V or VDD
Transition Time
Rise Time4
Fall Time4
1 dB Compression4
Third-Order Intermodulation Intercept
Video Feedthrough 5
DC ELECTRICAL CHARACTERISTICS
Input High Voltage
Input Low Voltage
Input Leakage Current
CAPACITANCE4
RF Port On Capacitance
Digital Input Capacitance
POWER REQUIREMENTS
VDD
Quiescent Power Supply Current
B Version
Typ 2 Max
DC
Insertion Loss
4
Min
51
35
30
50
35
30
21
18
15
18
16
18
26.5
10
GHz
GHz
dBm
dBm
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ns
13
16
ns
12
3
7.5
16
31
3
15
5
9
ns
ns
ns
dBm
dBm
mV p-p
0.4
0.6
1.1
60
45
37
58
32
35
27
26
30
22
23
22
8.5
2
2.5
7
16
0.8
0.9
1.5
Unit
1.7
0.65 VCC
± 0.1
0.7
0.35 VCC
±1
3
2
1.65
0.1
V
V
V
V
µA
pF
pF
2.75
1
V
µA
Temperature range B version: −40°C to +85°C.
Typical values are at VDD = 2.5 V and 25°C, unless otherwise stated.
3
Operating frequency is the point at which insertion loss degrades by 1.5 dB.
4
Guaranteed by design, not subject to production test.
5
Video feedthrough is the dc transience at the output of any port of the switch when the control voltage is switched from high to low or low to high in a 50 Ω test
setup, measured with 1 ns rise time pulses and 500 MHz bandwidth.
1
2
Rev. C | Page 3 of 16
ADG904/ADG904-R
Data Sheet
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 2.
Parameter
VDD to GND
Inputs to GND
Continuous Current
Input Power
Operating Temperature Range
Industrial (B Version)
Storage Temperature Range
Junction Temperature
TSSOP Package
θJA Thermal Impedance
LFCSP Package
θJA Thermal Impedance
(4-Layer Board)
Lead Temperature, Soldering (10 sec)
IR Reflow, Peak Temperature (
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