CMOS Low Voltage
2 Ω SPST Switches in SC70 Packages
ADG741/ADG742
FEATURES
1.8 V to 5.5 V single supply
2 Ω (typ) on resistance
Low on resistance flatness
−3 dB bandwidth >200 MHz
Rail-to-rail operation
6-lead and 5-lead SC70 packages
Fast switching times
t
ON
18 ns
t
OFF
12 ns
Typical power consumption (<0.01 µW)
TTL-/CMOS-compatible
FUNCTIONAL BLOCK DIAGRAMS
ADG741
S
D
IN
02076-001
SWITCH SHOWN FOR
A LOGIC 1 INPUT
Figure 1.
APPLICATIONS
Battery-powered systems
Communication systems
Sample-and-hold systems
Audio signal routing
Video switching
Mechanical reed relay replacement
S
ADG742
D
IN
02076-019
SWITCH SHOWN FOR
A LOGIC 1 INPUT
Figure 2.
GENERAL DESCRIPTION
The ADG741/ADG742 are monolithic CMOS SPST switches.
These switches are designed using an advanced submicron
process that provides low power dissipation, yet offers high
switching speed, low on resistance, and low leakage currents. In
addition, −3 dB bandwidths of greater than 200 MHz can be
achieved.
The ADG741/ADG742 can operate from a single 1.8 V to 5.5 V
supply, making them ideal for use in battery-powered instru-
ments and with Analog Devices’ new generation of DACs and
ADCs.
As shown in the Functional Block Diagrams, with a logic input
of 1 the switch of the ADG741 is closed, while that of the
ADG742 is open. Each switch conducts equally well in both
directions when on.
The ADG741/ADG742 are available in 6-lead and 5-lead SC70
packages.
PRODUCT HIGHLIGHTS
1.
1.8 V to 5.5 V Single-Supply Operation.
The ADG741/ADG742 offer high performance, including
low on resistance and fast switching times. They are fully
specified and guaranteed with 3 V and 5 V supply rails.
Very Low R
ON
(3 Ω max at 5 V, 5 Ω max at 3 V).
At 1.8 V operation, R
ON
is typically 40 Ω over the
temperature range.
On Resistance Flatness R
FLAT (ON)
(1 Ω max).
−3 dB Bandwidth >200 MHz.
Low Power Dissipation.
CMOS construction ensures low power dissipation.
Fast t
ON
/t
OFF
.
Tiny 6-Lead and 5-Lead SC70 Packages.
2.
3.
4.
5.
6.
7.
Rev. A
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: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
ADG741/ADG742
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Terminology ...................................................................................... 8
Test Circuits....................................................................................... 9
Applications Information .............................................................. 10
Supply Voltages........................................................................... 10
On Response vs. Frequency ...................................................... 10
Off Isolation ................................................................................ 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
REVISION HISTORY
3/05—Rev. 0 to Rev. A
Added 5-Lead Package.......................................................Universal
Change to Absolute Maximum Ratings......................................... 5
Inserted New Figure 4...................................................................... 6
Added Terminology Section ........................................................... 8
Replaced Figure 11, Figure 12, and Figure 13............................... 9
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 12
10/00—Revision 0: Initial Version
Rev. A | Page 2 of 12
ADG741/ADG742
SPECIFICATIONS
V
DD
= 5 V ±10%, GND = 0 V. All specifications −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
ANALOG SWITCH
Analog Signal Range
On Resistance (R
ON
)
On Resistance Flatness (R
FLAT (ON)
)
LEAKAGE CURRENTS
1
Source OFF Leakage I
S
(OFF)
Drain OFF Leakage I
D
(OFF)
Channel ON Leakage I
D
, I
S
(ON)
DIGITAL INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current
I
INL
or I
INH
DYNAMIC CHARACTERISTICS
t
ON
t
OFF
Charge Injection
Off Isolation
Bandwidth −3 dB
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
POWER REQUIREMENTS
I
DD
1
25°C
B Version
−40°C to +85°C
0 V to V
DD
Unit
V
Ω typ
Ω max
Ω typ
Ω max
nA typ
nA max
nA typ
nA max
nA typ
nA max
V min
V max
µA typ
µA max
ns typ
ns max
ns typ
ns max
pC typ
dB typ
dB typ
MHz typ
pF typ
pF typ
pF typ
Test Conditions/Comments
2
3
0.5
4
1.0
V
S
= 0 V to V
DD
, I
S
= −10 mA;
Figure 11
V
S
= 0 V to V
DD
, I
S
= −10 mA
V
DD
= 5.5 V
V
S
= 4.5 V/1 V, V
D
= 1 V/4.5 V;
Figure 12
V
S
= 4.5 V/1 V, V
D
= 1 V/4.5 V;
Figure 12
V
S
= V
D
= 1 V, or 4.5 V;
Figure 13
±0.01
±0.25
±0.01
±0.25
±0.01
±0.25
±0.35
±0.35
±0.35
2.4
0.8
0.005
±0.1
12
18
8
12
5
−55
−75
200
17
17
38
V
IN
= V
INL
or V
INH
R
L
= 300 Ω, C
L
= 35 pF
V
S
= 3 V; Figure 14
R
L
= 300 Ω, C
L
= 35 pF
V
S
= 3 V; Figure 14
V
S
= 2 V, R
S
= 0 Ω, C
L
= 1 nF; Figure 15
RL = 50 Ω, C
L
= 5 pF, f = 10 MHz
R
L
= 50 Ω, C
L
= 5 pF, f = 1 MHz; Figure 16
R
L
= 50 Ω, C
L
= 5 pF; Figure 17
V
DD
= 5.5 V
Digital Inputs = 0 V or 5 V
0.001
1.0
µA typ
µA max
1
Guaranteed by design; not subject to production test.
Rev. A | Page 3 of 12
ADG741/ADG742
V
DD
= 3 V ±10%, GND = 0 V. All specifications −40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
ANALOG SWITCH
Analog Signal Range
On Resistance (R
ON
)
On Resistance Flatness (R
FLAT (ON)
)
LEAKAGE CURRENTS
1
Source OFF Leakage I
S
(OFF)
Drain OFF Leakage I
D
(OFF)
Channel ON Leakage I
D
, I
S
(ON)
DIGITAL INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current
I
INL
or I
INH
DYNAMIC CHARACTERISTICS
t
ON
t
OFF
Charge Injection
Off Isolation
Bandwidth −3 dB
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
POWER REQUIREMENTS
I
DD
1
25°C
B Version
−40°C to +85°C
0 V to V
DD
Unit
V
Ω typ
Ω max
Ω typ
nA typ
nA max
nA typ
nA max
nA typ
nA max
V min
V max
µA typ
µA max
ns typ
ns max
ns typ
ns max
pC typ
dB typ
dB typ
MHz typ
pF typ
pF typ
pF typ
Test Conditions/Comments
3.5
5
1.5
±0.01
±0.25
±0.01
±0.25
±0.01
±0.25
6
±0.35
±0.35
±0.35
2.0
0.4
V
S
= 0 V to V
DD
, I
S
= −10 mA;
Figure 11
V
S
= 0 V to V
DD
, I
S
= −10 mA
V
DD
= 3.3 V
V
S
= 3 V/1 V, V
D
= 1 V/3 V;
Figure 12
V
S
= 3 V/1 V, V
D
= 1 V/3 V;
Figure 12
V
S
= V
D
= 1 V, or 3 V;
Figure 13
0.005
±0.1
14
20
8
13
4
−55
−75
200
17
17
38
V
IN
= V
INL
or V
INH
R
L
= 300 Ω, C
L
= 35 pF
V
S
= 2 V, Figure 14
R
L
= 300 Ω, C
L
= 35 pF
V
S
= 2 V, Figure 14
V
S
= 1.5 V, R
S
= 0 Ω, C
L
= 1 nF; Figure 15
R
L
= 50 Ω, C
L
= 5 pF, f = 10 MHz
R
L
= 50 Ω, C
L
= 5 pF, f = 1 MHz; Figure 16
R
L
= 50 Ω, C
L
= 5 pF; Figure 17
V
DD
= 3.3 V
Digital Inputs = 0 V or 3 V
0.001
1.0
µA typ
µA max
1
Guaranteed by design; not subject to production test.
Rev. A | Page 4 of 12
ADG741/ADG742
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameters
V
DD
to GND
Analog, Digital Inputs
1
Ratings
−0.3 V to +7 V
−0.3 V to V
DD
+ 0.3 V
or 30 mA, Whichever
Occurs First
30 mA
100 mA
Continuous Current, S or D
Peak Current, S or D (Pulsed at 1ms,
10% Duty Cycle Max)
Operating Temperature Range
Industrial (B Version)
Storage Temperature Range
Junction Temperature
SC70 Package
θ
JA
Thermal Impedance
θ
JC
Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
ESD
1
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; 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.
−40°C to +85°C
−65°C to +150°C
150°C
494.8°C/W
120°C/W
215°C
220°C
1.5 kV
Table 4. Truth Table
ADG741 In
0
1
ADG742 In
1
0
Switch Condition
OFF
ON
Overvoltages at IN, S, or D will be clamped by internal diodes. Current
should be limited to the maximum ratings given.
ESD 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 this product 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 degrada-
tion or loss of functionality.
Rev. A | Page 5 of 12
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