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FUNCTIONAL BLOCK DIAGRAM
S1A
D1
S1B
IN1
S2A
D2
S2B
IN2
ADG436
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Dual SPDT Switch
ADG436
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1998
FEATURES
44 V Supply Maximum Ratings
V
SS
to V
DD
Analog Signal Range
Low On Resistance (12
Typ)
Low R
ON
(3
Max)
Low R
ON
Match (2.5
Max)
Low Power Dissipation
Fast Switching Times
t
ON
< 175 ns
t
OFF
< 145 ns
Low Leakage Currents (5 nA Max)
Low Charge Injection (10 pC)
Break-Before-Make Switching Action
APPLICATIONS
Audio and Video Switching
Battery Powered Systems
Test Equipment
Communications Systems
GENERAL DESCRIPTION
The ADG436 is a monolithic CMOS device comprising two
independently selectable SPDT switches. It is designed on an
LC
2
MOS process which provides low power dissipation yet
gives high switching speed and low on resistance.
The on resistance profile is very flat over the full analog input
range ensuring good linearity and low distortion when switching
audio signals. High switching speed also makes the part suitable
for video signal switching. CMOS construction ensures ultralow
power dissipation making the part ideally suited for portable and
battery powered instruments.
Each switch conducts equally well in both directions when ON
and has an input signal range which extends to the power sup-
plies. In the OFF condition, signal levels up to the supplies are
blocked. All switches exhibit break-before-make switching ac-
tion for use in multiplexer applications. Inherent in the design is
low charge injection for minimum transients when switching the
digital inputs.
PRODUCT HIGHLIGHTS
1. Extended Signal Range
The ADG436 is fabricated on an enhanced LC
2
MOS pro-
cess, giving an increased signal range which extends to the
supply rails.
2. Low Power Dissipation
3. Low R
ON
4. Single Supply Operation
For applications where the analog signal is unipolar, the
ADG436 can be operated from a single rail power supply.
REV. A
2
ADG436SPECIFICATIONS
1
Dual Supply
40 C to
Test Conditions/
Parameter
+25 C
+85 C
Units
Comments
ANALOG SWITCH
Analog Signal Range
V
SS
to V
DD
V
R
ON
12
typ
V
D
=
10 V, I
S
= 1 mA
25
max
R
ON
1
typ
V
D
= 5 V, 5 V, I
S
= 10 mA
3
max
R
ON
Match
1
typ
V
D
=
10 V, I
S
= 10 mA
2.5
max
LEAKAGE CURRENTS
V
DD
= +16.5 V, V
SS
= 16.5 V
Source OFF Leakage I
S
(OFF)
0.005
nA typ
V
D
=
15.5 V, V
S
=
15.5 V
0.25
5
nA max
Test Circuit 2
Channel ON Leakage I
D
, I
S
(ON)
0.05
nA typ
V
S
= V
D
=
15.5 V
0.4
5
nA max
Test Circuit 3
DIGITAL INPUTS
Input High Voltage, V
INH
2.4
V min
Input Low Voltage, V
INL
0.8
V max
Input Current
I
INL
or I
INH
0.005
A typ
V
IN
= 0 V or V
DD
0.5
A max
DYNAMIC CHARACTERISTICS
2
t
ON
70
ns typ
R
L
= 300
, C
L
= 35 pF;
125
ns max
V
S
=
10 V; Test Circuit 4
t
OFF
60
ns typ
R
L
= 300
, C
L
= 35 pF;
120
ns max
V
S
=
10 V; Test Circuit 4
Break-Before-Make Delay, t
OPEN
10
ns min
R
L
= 300
, C
L
= 35 pF;
V
S
= +5 V; Test Circuit 5
Charge Injection
10
pC typ
V
D
= 0 V, R
D
= 0
, C
L
= 10 nF;
Test Circuit 6
OFF Isolation
72
dB typ
R
L
= 75
, C
L
= 5 pF, f = 1 MHz;
V
S
= 2.3 V
rms, Test Circuit 7
Channel-to-Channel Crosstalk
90
dB typ
R
L
= 75
, C
L
= 5 pF, f = 1 MHz;
V
S
= 2.3 V rms,
Test Circuit 8
C
S
(OFF)
10
pF typ
C
D
, C
S
(ON)
30
pF typ
POWER REQUIREMENTS
I
DD
0.05
mA typ
Digital Inputs = 0 V or 5 V
0.35
mA max
I
SS
0.01
A typ
1
5
A max
V
DD
/V
SS
3/
20
V min/V max
|V
DD
| = |V
SS
|
NOTES
1
Temperature range is as follows: B Version, 40
C to +85
C.
2
Guaranteed by design, not subject to production test.
Specifications subject to change without notice.
(V
DD
= +15 V, V
SS
= 15 V, GND = 0 V, unless otherwise noted)
REV. A
3
Single Supply
40 C to
Test Conditions/
Parameter
+25 C
+85 C
Units
Comments
ANALOG SWITCH
Analog Signal Range
0 to V
DD
V
R
ON
20
typ
V
D
= +1 V, +10 V, I
S
= 1 mA
40
max
R
ON
Match
2.5
max
LEAKAGE CURRENTS
V
DD
= +13.2 V
Source OFF Leakage I
S
(OFF)
0.005
nA typ
V
D
= 12.2 V/1 V, V
S
= 1 V/12.2 V
0.25
5
nA max
Test Circuit 2
Channel ON Leakage I
D
, I
S
(ON)
0.05
nA typ
V
S
= V
D
= 12.2 V/1 V
4
5
nA max
Test Circuit 3
DIGITAL INPUTS
Input High Voltage, V
INH
2.4
V min
Input Low Voltage, V
INL
0.8
V max
Input Current
I
INL
or I
INH
0.005
A typ
V
IN
= 0 V or V
DD
0.5
A max
DYNAMIC CHARACTERISTICS
2
t
ON
100
ns typ
R
L
= 300
, C
L
= 35 pF;
200
ns max
V
S
= +8 V; Test Circuit 4
t
OFF
90
ns typ
R
L
= 300
, C
L
= 35 pF;
180
ns max
V
S
= +8 V; Test Circuit 4
Break-Before-Make Delay, t
OPEN
10
ns typ
R
L
= 300
, C
L
= 35 pF;
V
S
= +5 V; Test Circuit 5
Charge Injection
10
pC typ
V
D
= 6 V, R
D
= 0
, C
L
= 10 nF;
Test Circuit 6
OFF Isolation
72
dB typ
R
L
= 75
, C
L
= 5 pF, f = 1 MHz;
V
S
= 1.15 V rms; Test Circuit 7
Channel-to-Channel Crosstalk
90
dB typ
R
L
= 75
, C
L
= 5 pF, f = 1 MHz;
V
S
= 1.15 V rms,
Test Circuit 8
C
S
(OFF)
10
pF typ
C
D
, C
S
(ON)
30
pF typ
POWER REQUIREMENTS
V
DD
= +13.5 V
I
DD
0.05
mA typ
Digital Inputs = 0 V or 5 V
0.35
mA max
V
DD
+3/+30
V min/V max
NOTES
1
Temperature range is as follows: B Version, 40
C to +85
C.
2
Guaranteed by design, not subject to production test.
Specifications subject to change without notice.
(V
DD
= +12 V, V
SS
= 0 V, GND = 0 V, unless otherwise noted)
ADG436
ADG436
REV. A
4
SOIC Package
JA
, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 77
C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . +215
C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent 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.
2
Overvoltages at IN, S or D will be clamped by internal diodes. Current should be
limited to the maximum ratings given.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= +25
C unless otherwise noted)
V
DD
to V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +44 V
V
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +30 V
V
SS
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to 30 V
Analog, Digital Inputs
2
. . . . . . . . . . . V
SS
2 V to V
DD
+ 2 V
or 20 mA, whichever occurs first
Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . 20 mA
Peak Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
(Pulsed at 1 ms, 10% Duty Cycle max)
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . 40
C to +85
C
Storage Temperature Range . . . . . . . . . . . . 65
C to +125
C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150
C
Plastic DIP Package
JA
, Thermal Impedance . . . . . . . . . . . . . . . . . . . 117
C/W
Lead Temperature, Soldering (10 sec) . . . . . . . . . . +260
C
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 ADG436 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.
Table I. Truth Table
Logic
Switch A
Switch B
0
OFF
ON
1
ON
OFF
ORDERING GUIDE
Temperature
Package
Package
Model
Range
Descriptions
Options
ADG436BN
40
C to +85
C
Plastic DIP
N-16
ADG436BR
40
C to +85
C
0.15" SOIC
R-16A
WARNING!
ESD SENSITIVE DEVICE
ADG436
REV. A
5
TERMINOLOGY
t
OFF
Delay between applying the digital control
input and the output switching off.
t
OPEN
Break-before-make delay when switches are
configured as a multiplexer.
V
INL
Maximum input voltage for Logic "0."
V
INH
Minimum input voltage for Logic "1."
I
INL
(I
INH
)
Input current of the digital input.
Crosstalk
A measure of unwanted signal that is coupled
through from one channel to another as a result
of parasitic capacitance.
Off Isolation
A measure of unwanted signal coupling
through an "OFF" switch.
Charge Injection A measure of the glitch impulse transferred
from the digital input to the analog output
during switching.
I
DD
Positive supply current.
I
SS
Negative supply current.
V
DD
Most positive power supply potential.
V
SS
Most negative power supply potential in dual
supplies. In single supply applications, it may
be connected to ground.
GND
Ground (0 V) reference.
S
Source terminal. May be an input or output.
D
Drain terminal. May be an input or output.
IN
Logic control input.
R
ON
Ohmic resistance between D and S.
R
ON
R
ON
variation due to a change in the analog
input voltage with a constant load current.
R
ON
Match
Difference between the R
ON
of any two channels.
I
S
(OFF)
Source leakage current with the switch "OFF."
I
D
, I
S
(ON)
Channel leakage current with the switch "ON."
V
D
(V
S
)
Analog voltage on terminals D, S.
C
S
(OFF)
"OFF" switch source capacitance.
C
D
, C
S
(ON)
"ON" switch capacitance.
t
ON
Delay between applying the digital control
input and the output switching on.
PIN CONFIGURATION
(DIP/SOIC)
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
ADG436
NC = NO CONNECT
IN1
V
DD
NC
NC
NC
S1A
D1
S1B
S2A
D2
S2B
V
SS
GND
NC
NC
IN2
V
D
, V
S
Volts
R
ON
20
18
10
0
3
15
6
9
12
16
14
12
V
DD
= +16.5V
V
SS
= 0V
+85 C
+25 C
40 C
Figure 4. R
ON
as a Function of V
D
(V
S
)
for Different Temperatures: Single
Supply
V
D
, V
S
Volts
I
D
(ON) nA
0.01
0
0.03
15
10
15
5
0
5
10
0.01
0.02
V
DD
= +16.5V
V
SS
= 16.5V
T
A
= +25 C
Figure 5. I
D
(ON) Leakage Current as a
Function of V
D
(V
S
): Dual Supply
V
D
, V
S
Volts
I
S
(OFF) nA
0.01
0
0.03
15
10
15
5
0
5
10
0.01
0.02
V
DD
= +16.5V
V
SS
= 16.5V
T
A
= +25 C
Figure 6. I
S
(OFF) Leakage Current as
a Function of V
D
(V
S
): Dual Supply
V
D
, V
S
Volts
R
ON
26
22
6
15
10
15
5
0
5
10
18
14
10
T
A
= +25 C
V
DD
= +5V
V
SS
= 5V
V
DD
= +10V
V
SS
= 10V
V
DD
= +15V
V
SS
= 15V
Figure 1. R
ON
as a Function of V
D
(V
S
):
Dual Supply
V
D
, V
S
Volts
R
ON
50
45
10
0
3
15
6
9
12
30
25
20
15
40
35
V
DD
= +5V
V
SS
= 0V
V
DD
= +10V
V
SS
= 0V
V
DD
= +15V
V
SS
= 0V
Figure 2. R
ON
as a Function of V
D
(V
S
):
Single Power Supply
V
D
, V
S
Volts
R
ON
16
14
6
15
10
15
5
0
5
10
12
10
8
V
DD
= +16.5V
V
SS
= 16.5V
+85 C
+25 C
40 C
Figure 3. R
ON
as a Function of V
D
(V
S
)
for Different Temperatures: Dual
Supply
V
D
, V
S
Volts
160
140
60
0
5
10
15
20
120
100
80
V
D
= 2V
V
S
= 2V
SWITCHING TIME ns
Figure 8. Switching Time as a Func-
tion of V
D
(V
S
): Dual Supply
SWITCHING FREQUENCY kHz
I
DD
mA
1
0.8
0
0
200
1000
400
600
800
0.6
0.4
0.2
V
DD
= +16.5V
V
SS
= 16.5V
T
A
= +25 C
Figure 9. I
DD
as a Function of Switch-
ing Frequency: Dual Supply
V
D
, V
S
Volts
0.01
0
0.03
15
10
15
5
0
5
10
0.01
0.02
V
DD
= +16.5V
V
SS
= 16.5V
T
A
= +25 C
I
S
(ON) nA
Figure 7. I
S
(ON) Leakage Current as a
Function of V
D
(V
S
): Dual Supply
ADG436Typical Performance Characteristics
REV. A
6
ADG436
REV. A
7
Test Circuits
V
D
S
D
I
DS
V1
R
ON
= V
1
/I
DS
Test Circuit 1. On Resistance
V
D
S
D
A
I
D
(ON)
NC
NC = NO CONNECT
Test Circuit 3. On Leakage
V
D
S
D
A
V
S
I
S
(OFF)
Test Circuit 2. Off Leakage
V
SS
0.1 F
V
DD
GND
D
S
V
SS
V
DD
V
IN1
0.1 F
S
D
V
IN2
NC
V
OUT
75
R
L
75
CHANNEL-TO-CHANNEL
CROSSTALK
20 Log |V
S
/V
OUT
|
V
S
Test Circuit 8. Channel-to-Channel Crosstalk
V
IN
V
SS
V
DD
GND
V
OUT
D
S
V
SS
V
DD
0.1 F
0.1 F
V
S
R
L
75
Test Circuit 7. Off Isolation
SB
V
SS
V
DD
0.1 F
0.1 F
IN
10V
+10V
SA
GND
RL
CL
300
35pF
V
OUT
D
V
SS
V
DD
V
S
t
ON
50%
50%
V
IN
3V
+10V
0V
t
OFF
50%
V
S
0V
10V
Test Circuit 4. Switching Times
SB
V
SS
V
DD
0.1 F
0.1 F
IN
SA
GND
R
L
C
L
300
35pF
V
OUT
D
V
SS
V
DD
V
S
0V
3V
V
IN
t
OPEN
50%
50%
V
OUT
V
S
Test Circuit 5. Break-Before-Make Delay, t
OPEN
V
SS
V
DD
GND
C
L
10nF
V
OUT
V
D
R
D
D
SA
V
SS
V
DD
0V
3V
V
IN
V
OUT
0V
Q
INJ
= C
L
V
OUT
V
OUT
IN
Test Circuit 6. Charge Injection
ADG436
REV. A
8
C2108a011/98
PRINTED IN U.S.A.
APPLICATIONS INFORMATION
ADG436 Supply Voltages
The ADG436 can operate from a dual or single supply. V
SS
should
be connected to GND when operating with a single supply. When
using a dual supply, the ADG436 can also operate with unbal-
anced supplies, for example V
DD
= 20 V and V
SS
= 5 V. The
only restrictions are that V
DD
to GND must not exceed 30 V,
V
SS
to GND must not drop below 30 V and V
DD
to V
SS
must
not exceed +44 V. It is important to remember that the ADG436
supply voltage directly affects the input signal range, the switch
ON resistance and the switching times of the part. The effects of
the power supplies on these characteristics can be clearly seen
from the characteristic curves in this data sheet.
Power-Supply Sequencing
When using CMOS devices, care must be taken to ensure correct
power-supply sequencing. Incorrect power-supply sequencing can
result in the device being subjected to stresses beyond those
maximum ratings listed in the data sheet. Always sequence V
DD
on first followed by V
SS
and the logic signals. An external signal
can then be safely presented to the source or drain of the switch.
OUTLINE DIMENSIONS
Dimensions are shown in inches and (mm).
16-Lead Plastic DIP
(N-16)
16
1
8
9
0.840 (21.33)
0.745 (18.93)
0.280 (7.11)
0.240 (6.10)
PIN 1
SEATING
PLANE
0.022 (0.558)
0.014 (0.356)
0.060 (1.52)
0.015 (0.38)
0.210 (5.33)
MAX
0.130
(3.30)
MIN
0.070 (1.77)
0.045 (1.15)
0.100
(2.54)
BSC
0.160 (4.06)
0.115 (2.93)
0.325 (8.25)
0.300 (7.62)
0.015 (0.381)
0.008 (0.204)
0.195 (4.95)
0.115 (2.93)
16-Lead Narrow Body SOIC
(R-16A)
16
9
8
1
0.3937 (10.00)
0.3859 (9.80)
0.2550 (6.20)
0.2284 (5.80)
0.1574 (4.00)
0.1497 (5.80)
PIN 1
SEATING
PLANE
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
0.0688 (1.75)
0.0532 (1.35)
0.0500
(1.27)
BSC
0.0099 (0.25)
0.0075 (0.19)
0.0500 (1.27)
0.0160 (0.41)
8
0
0.0196 (0.50)
0.0099 (0.25)
x 45
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