AD ADG901BCP-500RL7 Wideband, 40 db isolation at 1 ghz, cmos 1.65 v to 2.75 v, spst switch Datasheet

Wideband, 40 dB Isolation at 1 GHz, CMOS
1.65 V to 2.75 V, SPST Switches
ADG901/ADG902
FEATURES
Wideband Switch: –3 dB @ 4.5 GHz
Absorptive/Reflective Switches
High Off Isolation (40 dB @ 1 GHz)
Low Insertion Loss (0.8 dB @1 GHz)
Single 1.65 V to 2.75 V Power Supply
CMOS/LVTTL Control Logic
8-Lead MSOP and Tiny 3 mm 3 mm LFCSP Packages
Low Power Consumption (<1 A)
FUNCTIONAL BLOCK DIAGRAMS
ADG901
RF1
50
50
CTRL
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
ADG902
RF1
RF2
CTRL
GENERAL DESCRIPTION
The ADG901/ADG902 are wideband switches that use a
CMOS process to provide high isolation and low insertion loss to
1 GHz. The ADG901 is an absorptive (matched) switch with
50 Ω terminated shunt legs, while the ADG902 is a reflective
switch. These devices are designed such that the isolation is
high over the dc to 1 GHz frequency range. They have on-board
CMOS control logic, thus eliminating the need for external
controlling circuitry. The control inputs are both CMOS and
LVTTL compatible. The low power consumption of these
CMOS devices makes them ideally suited to wireless applications and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. –40 dB Off Isolation @ 1 GHz
2. 0.8 dB Insertion Loss @ 1 GHz
3. Tiny 8-Lead MSOP/LFCSP Packages
0
–10
RF2
–0.4
TA = 25C
–0.6
–0.8
–20
–1.0
INSERTION LOSS (dB)
ISOLATION (dB)
–30
–40
–50
VDD = 2.5 V
–60
–70
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
–2.4
–80
–2.6
–90
–2.8
VDD = 1.8 V
–100
10k
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
–3.0
10k
VDD = 2.5V
TA = 25C
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
Figure 1. Off Isolation vs. Frequency
Figure 2. Insertion Loss vs. Frequency
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. 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.
REV. A
= 1.65 V to 2.75 V, GND = 0 V, input power = 0 dBm,
T to T , unless otherwise noted.)
ADG901/ADG902–SPECIFICATIONS1 (Vall specifications
DD
MIN
Parameter
Symbol
AC ELECTRICAL CHARACTERISTICS
Operating Frequency3
–3 dB Frequency4
Input Power4
Conditions
MAX
Min
B Version
Typ2
Max
DC
Insertion Loss
S21, S12
Isolation—RF1 to RF2
(CP Package)
S21, S12
Isolation—RF1 to RF2
(RM Package)
S21, S12
Return Loss (On Channel)4
S11, S22
Return Loss (Off Channel)4
S11, S22
On Switching Time4
Off Switching Time4
Rise Time4
Fall Time4
1 dB Compression4
Third Order Intermodulation Intercept
Video Feedthrough5
tON
tOFF
tRISE
tFALL
P–1 dB
IP3
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
60
500 MHz
43
1000 MHz
34
100 MHz
51
500 MHz
37.5
1000 MHz
31
DC to 100 MHz
20
500 MHz
23
1000 MHz
25
DC to 100 MHz
18
500 MHz
17
1000 MHz
15
50% CTRL to 90% RF
50% CTRL to 10% RF
10% to 90% RF
90% to 10% RF
1000 MHz
900 MHz/901 MHz, 4 dBm
30
DC ELECTRICAL CHARACTERISTICS
Input High Voltage
VINH
VINH
Input Low Voltage
VINL
VINL
Input Leakage Current
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
CAPACITANCE4
RF1/RF2, RF Port On Capacitance
CTRL Input Capacitance
CRF ON
CCTRL
f = 1 MHz
f = 1 MHz
POWER REQUIREMENTS
VDD
Quiescent Power Supply Current
IDD
Digital inputs = 0 V or VDD
0.4
0.5
0.8
61
45
40
60
47
37
28
29
28
23
21
19
3.6
5.8
3.1
6.0
17
36
2.5
2.5
4.5
7
16
0.7
0.8
1.25
6
9.5
5.5
8.5
1.7
0.65 VCC
± 0.1
0.7
0.35 VCC
±1
1.2
2.1
1.65
0.1
Unit
GHz
GHz
dBm
dBm
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ns
ns
ns
ns
dBm
dBm
mV p-p
V
V
V
V
µA
pF
pF
2.75
1
V
µA
NOTES
1
Temperature range B Version: –40°C to +85°C.
2
Typical values are at V DD = 2.5 V and 25°C, unless otherwise stated.
3
Point at which insertion loss degrades by 1 dB.
4
Guaranteed by design, not subject to production test.
5
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.
Specifications subject to change without notice.
–2–
REV. A
ADG901/ADG902
ABSOLUTE MAXIMUM RATINGS 1
LFCSP Package
␪JA Thermal Impedance (2-layer board) . . . . . . . . . . 84°C/W
␪JA Thermal Impedance (4-layer board) . . . . . . . . . . 48°C/W
Lead Temperature, Soldering (10 sec) . . . . . . . . . . . . . 300°C
IR Reflow, Peak Temperature (<20 sec) . . . . . . . . . . . . 235°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kV
(TA = 25°C, unless otherwise noted.)
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to +4 V
Inputs to GND . . . . . . . . . . . . . . . . . . –0.5 V to VDD + 0.3 V2
Continuous Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 dBm
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
MSOP Package
␪JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 206°C/W
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of
the device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability. Only one absolute
maximum rating may be applied at any one time.
2
RF1/2 Off Port Inputs to Ground ................................... –0.5 V to VDD – 0.5 V
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
Branding
ADG901BRM
ADG901BRM-500RL7
ADG901BRM-REEL7
ADG901BCP-500RL7
ADG901BCP-REEL7
ADG902BRM
ADG902BRM-500RL7
ADG902BRM-REEL7
ADG902BCP-500RL7
ADG902BCP-REEL7
EVAL-ADG901EB
EVAL-ADG902EB
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Mini Small Outline Package (MSOP)
Mini Small Outline Package (MSOP)
Mini Small Outline Package (MSOP)
Lead Frame Chip Scale Package (LFCSP)
Lead Frame Chip Scale Package (LFCSP)
Mini Small Outline Package (MSOP)
Mini Small Outline Package (MSOP)
Lead Frame Chip Scale Package (LFCSP)
Lead Frame Chip Scale Package (LFCSP)
Lead Frame Chip Scale Package (LFCSP)
Evaluation Board
Evaluation Board
RM-8
RM-8
RM-8
CP-8
CP-8
RM-8
RM-8
RM-8
CP-8
CP-8
W6B
W6B
W6B
W6B
W6B
W7B
W7B
W7B
W7B
W7B
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADG901/ADG902 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
PIN CONFIGURATION
8-Lead MSOP (RM-8)
8-Lead 3 mm 3 mm LFCSP (CP-8)
VDD
1
CTRL 2
ADG901/
ADG902
8
RF2
7
GND
PIN FUNCTION DESCRIPTIONS
GND 3
6 GND
TOP VIEW
(Not to Scale) 5
4
GND
RF1
Table I. Truth Table
REV. A
CTRL
Signal Path
0
1
RF1 isolated from RF2
RF1 to RF2
–3–
Pin No.
Mnemonic
Function
1
VDD
2
CTRL
3, 5, 6, 7
GND
4
8
RF1
RF2
Power Supply Input. These parts can
be operated from 1.65 V to 2.75 V;
VDD should be decoupled to GND.
CMOS or TTL Logic Level.
0 ➞ RF1 Isolated from RF2
1 ➞ RF1 to RF2
Ground Reference Point for All
Circuitry on the Part.
RF1 Port.
RF2 Port.
ADG901/ADG902
TERMINOLOGY
Parameter
Description
VDD
IDD
GND
CTRL
VINL
VINH
IINL (IINH)
CIN
tON
tOFF
tRISE
tFALL
Off Isolation
Most positive power supply potential.
Positive supply current.
Ground (0 V) reference.
Logic control input.
Maximum input voltage for Logic 0.
Minimum input voltage for Logic 1.
Input current of the digital input.
Digital input capacitance.
Delay between applying the digital control input and the output switching on.
Delay between applying the digital control input and the output switching off.
Rise time. Time for the RF signal to rise from 10% to 90% of the ON level.
Fall time. Time for the RF signal to fall from 90% to 10% of the ON level.
The attenuation between input and output ports of the switch when the switch control voltage is in the
OFF condition.
Insertion Loss
The attenuation between input and output ports of the switch when the switch control voltage is in the
ON condition.
1 dB compression point. The RF input power level at which the switch insertion loss increases by 1 dB over its
P–1 dB
low level value. It is a measure of how much power the ON switch can handle before the insertion loss increases
by 1 dB.
Third order intermodulation intercept. This is a measure of the power in false tones that occur when closely spaced
IP3
tones are passed through a switch, whereby the nonlinearity of the switch causes these false tones to be generated.
Return Loss
The amount of reflected power relative to the incident power at a port. Large return loss indicates good matching.
By measuring Return Loss the VSWR can be calculated from conversion charts. VSWR (voltage standing wave ratio)
indicates degree of matching present at a switch RF port.
Video Feedthrough Spurious signals present at the RF ports of the switch when the control voltage is switched from high to low
or low to high without an RF signal present.
–4–
REV. A
Typical Performance Characteristics–ADG901/ADG902
VDD = 2.25V
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
VDD = 2.75V
–2.2
–2.4
TA = 25C
–0.8
–0.55
–0.60 VDD = 2.5V
VDD = 2.75V
–0.65
–0.70
–0.75
–0.80
–0.85
–3.0
10k
100k
–0.95
1M
10M 100M
FREQUENCY (Hz)
1G
10G
TPC 1. Insertion Loss vs. Frequency
over Supplies (S12 and S21)
–0.4
–1.00
10k
–0.6
–0.8 +25C
+85C
–1.0
ISOLATION (dB)
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
–2.4
–2.6
VDD = 2.5V
–3.0
10k
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
TPC 4. Insertion Loss vs. Frequency
over Temperature (S12 and S21)
–1.2
–1.4
–1.6
–1.8
–2.0
VDD = 1.65V
–2.2
–2.4
–2.6
TA = 25C
100k
–2.8
1M
10M 100M
FREQUENCY (Hz)
1G
0
–5 TA = 25C
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
VDD = 2.5V
–60
–65
–70
–75
–80
–85
VDD = 1.8V
–90
–95
–100
10k 100k
1M
10M
100M 1G
FREQUENCY (Hz)
10G
TPC 5. OFF Isolation vs. Frequency
over Supplies (S12 and S21)
TA = 25C
–3.0
10k
10G
TPC 2. Insertion Loss vs. Frequency
over Supplies (S12 and S21)
(Zoomed TPC 1 Plot)
–40C
VDD = 1.95V
–1.0 VDD = 1.8V
VDD = 2.25V
100k
1M
10M 100M
FREQUENCY (Hz)
1G
10G
TPC 3. Insertion Loss vs. Frequency
over Supplies (S12 and S21)
ISOLATION (dB)
–2.8
INSERTION LOSS (dB)
–0.6
–0.50
–0.90
–2.6
–2.8
–0.45
INSERTION LOSS (dB)
VDD = 2.5V
INSERTION LOSS (dB)
INSERTION LOSS (dB)
–0.6
–0.8
–0.4
–0.40
–0.4
0
–5 VDD = 2.5V
–10
–15
–20
–25
–30
–35
–40
–45
+85C
–50
–55
–60
+25C
–65
–70
–75
–80
–40C
–85
–90
10k 100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
TPC 6. OFF Isolation vs. Frequency
over Temperature (S12 and S21)
0
TA = 25C
–5 VDD = 2.5V
CH1
RETURN LOSS (dB)
–10
–15
OFF SWITCH
CTRL
CH2
–20
RFx
–25
–30
–35
10k
ON SWITCH
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
TPC 7. Return Loss vs. Frequency
(S11)
REV. A
CH1 = CTRL = 1V/DIV
CH2 = RFx = 100mV/DIV
tRISE = 2.8ns
tFALL = 5.1ns
CH2 pk-pk
2.016mV
CH1 500mV
TPC 8. Switch Timing
–5–
CH2 1mV 10.0ns
TPC 9. Video Feedthrough
ADG901/ADG902
40
20
35
18
16
30
P–1dB (dBm)
IP3 (dBm)
14
25
20
15
12
10
8
6
10
4
5
0
250
VDD = 2.5V
TA = 25C
VDD = 2.5V
TA = 25C
2
0
350
450
550
650
750
FREQUENCY (MHz)
TPC 10. IP3 vs. Frequency
850
0
250
500
750
1000
1250
1500
FREQUENCY (MHz)
TPC 11. P–1dB vs. Frequency
–6–
REV. A
ADG901/ADG902
Test Circuits*
VDD
0.1F
VDD
0.1F
ADG901
RL
50
VDD
VOUT
VDD
RF1
VS
RF2
VOUT
RL
50
CTRL
RF1
50%
VS
50
50
10%
90%
VOUT
50
RF2
50%
VCTRL
NETWORK
ANALYZER
CTRL
GND
GND
tON
VCTRL
tOFF
INSERTION LOSS = 20 LOG
Test Circuit 1. Switching Timing: tON, tOFF
VOUT
VS
Test Circuit 4. Insertion Loss
VDD
0.1F
VDD
0.1F
ADG901
VDD
RF2
RF1
VS
RF1
50%
50%
RL
50
CTRL
OSCILLOSCOPE
VOUT
VDD
RF2
VCTRL
VOUT
90%
10%
50
90%
50
10%
CTRL
GND
GND
VCTRL
tRISE
tFALL
Test Circuit 2. Switch Timing: tRISE, tFALL
Test Circuit 5. Video Feedthrough
VDD
0.1F
ADG901
RL
50
VDD
RF1
VOUT
50
RF2
VS
50
50
NETWORK
ANALYZER
CTRL
GND
VCTRL
OFF ISOLATION = 20 LOG
VOUT
VS
Test Circuit 3. Off Isolation
*Similiar setups for ADG902.
REV. A
–7–
NC
ADG901/ADG902
VDD
VDD
0.1F
0.1F
RF
SOURCE
ADG901
SPECTRUM
ANALYZER
VDD
ADG901
SPECTRUM
ANALYZER
COMBINER
RF1
RF2
VDD
RF2
RF1
RF
SOURCE
VS
50
50
50
50
RF
SOURCE
CTRL
CTRL
GND
GND
VCTRL
VCTRL
Test Circuit 7. P–1dB
Test Circuit 6. IP3
–8–
REV. A
ADG901/ADG902
APPLICATIONS
ADG9xx EVALUATION BOARD
The ADG901/ADG902 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.
The ADG9xx evaluation board allows designers to evaluate the
high performance wideband switches with a minimum of effort.
To prove that these devices meet user requirements, the user
requires only a power supply and a network analyzer along with
the evaluation board. An application note is available with the
evaluation board and provides complete information on operating
the evaluation board.
Applications include switching between high frequency filters,
ASK generator, and FSK generator.
The RF1 port (see Figure 3) is connected through a 50 Ω transmission line to the top left SMA connector J1. RF2 is connected
through a 50 Ω transmission line to the top SMA connector J2.
J3 is connected to GND. A through transmission line connects
J4 and J5 and this transmission line is used to estimate the loss
of the PCB over the environmental conditions being evaluated.
Absorptive vs. Reflective Switches
The ADG901 is an absorptive (matched) switch with 50 Ω terminated shunt legs, and the ADG902 is a reflective switch with 0 Ω
terminated shunts to ground. The ADG901 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 ADG901 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 board is constructed of a 4-layer, FR4 material with a dielectric constant of 4.3 and an overall thickness of 0.062 inches. Two
ground layers with grounded planes provide ground for the RF
transmission lines. The transmission lines were designed using a
coplanar waveguide with ground plane model using a trace width
of 0.052 inches, clearance to ground plane of 0.030 inches,
dielectric thickness of 0.029 inches, and a metal thickness of
0.014 inches.
The ADG902 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.
Figure 3. ADG9xx Evaluation Board Top View
REV. A
–9–
ADG901/ADG902
OUTLINE DIMENSIONS
8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
3.00
BSC
8
5
4.90
BSC
3.00
BSC
1
4
PIN 1
0.65 BSC
1.10 MAX
0.15
0.00
0.38
0.22
COPLANARITY
0.10
0.80
0.60
0.40
8
0
0.23
0.08
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-187AA
8-Lead Lead Frame Chip Scale Package [LFCSP]
3 mm 3 mm Body
(CP-8)
Dimensions shown in millimeters
3.00
BSC SQ
0.50
0.40
0.30
0.60 MAX
PIN 1 INDICATOR
0.45
PIN 1
INDICATOR
0.90
0.85
0.80
8
TOP
VIEW
2.75
BSC SQ
0.50
BSC
0.25
MIN
0.80 MAX
0.65 TYP
12 MAX
SEATING
PLANE
1
1.50
REF
BOTTOM
VIEW
5
1.90
1.75
1.60
4
1.60
1.45
1.30
0.05 MAX
0.02 NOM
0.30
0.23
0.18
0.20 REF
–10–
REV. A
ADG901/ADG902
Revision History
Location
Page
10/04—Data Sheet changed from REV. 0 to REV. A.
Changes to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Changes to PRODUCT HIGHLIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Changes to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Change to ADG9xx EVALUATION BOARD section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
REV. A
–11–
–12–
C03336–0–10/04(A)
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