ADG431 Analog Devices, ADG431 Datasheet

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ADG431

Manufacturer Part Number
ADG431
Description
LC2MOS Precision Quad SPST Switches
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
The ADG431, ADG432 and ADG433 are monolithic CMOS
devices comprising four independently selectable switches. They
are designed on an enhanced LC
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 excellent linearity and low distortion when
switching audio signals. Fast switching speed coupled with high
signal bandwidth also make the parts suitable for video signal
switching. CMOS construction ensures ultralow power dissipa-
tion making the parts ideally suited for portable and battery
powered instruments.
The ADG431, ADG432 and ADG433 contain four indepen-
dent SPST switches. The ADG431 and ADG432 differ only in
that the digital control logic is inverted. The ADG431 switches
are turned on with a logic low on the appropriate control input,
while a logic high is required for the ADG432. The ADG433
has two switches with digital control logic similar to that of the
ADG431 while the logic is inverted on the other two switches.
Each switch conducts equally well in both directions when ON
and has an input signal range which extends to the supplies. In
the OFF condition, signal levels up to the supplies are blocked.
All switches exhibit break before make switching action for use
in multiplexer applications. Inherent in the design is low charge
injection for minimum transients when switching the digital inputs.
REV. B
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.
FEATURES
44 V Supply Maximum Ratings
Low On Resistance (<24
Ultralow Power Dissipation (3.9 W)
Low Leakage (<0.25 nA)
Fast Switching Times
Break-Before-Make Switching Action
TTL/CMOS Compatible
Plug-in Replacement for DG411/DG412/DG413
APPLICATIONS
Audio and Video Switching
Automatic Test Equipment
Precision Data Acquisition
Battery Powered Systems
Sample Hold Systems
Communication Systems
15 V Analog Signal Range
t
t
ON
OFF
<165 ns
<130 ns
)
2
MOS process which provides
PRODUCT HIGHLIGHTS
1. Extended Signal Range
2. Ultralow Power Dissipation
3. Low R
4. Break-Before-Make Switching
5. Single Supply Operation
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Precision Quad SPST Switches
The ADG431, ADG432 and ADG433 are fabricated on an
enhanced LC
which extends fully to the supply rails.
This prevents channel shorting when the switches are config-
ured as a multiplexer.
For applications where the analog signal is unipolar, the
ADG431, ADG432 and ADG433 can be operated from a
single rail power supply. The parts are fully specified with a
single +12 V power supply and will remain functional with
single supplies as low as +5 V.
IN1
IN2
IN3
IN4
ADG431/ADG432/ADG433
ON
FUNCTIONAL BLOCK DIAGRAMS
ADG431
SWITCHES SHOWN FOR A LOGIC "1" INPUT
2
MOS process giving an increased signal range
World Wide Web Site: http://www.analog.com
IN1
IN2
IN3
IN4
S1
D1
S2
D2
S3
D3
S4
D4
ADG433
IN1
IN2
IN3
IN4
© Analog Devices, Inc., 1998
S1
D1
S2
D2
S3
D3
S4
D4
ADG432
LC
S1
D1
S2
D2
S3
D3
S4
D4
2
MOS

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ADG431 Summary of contents

Page 1

... ADG432. The ADG433 has two switches with digital control logic similar to that of the ADG431 while the logic is inverted on the other two switches. Each switch conducts equally well in both directions when ON and has an input signal range which extends to the supplies. In the OFF condition, signal levels up to the supplies are blocked ...

Page 2

... ADG431/ADG432/ADG433–SPECIFICATIONS Dual Supply (V = + Parameter ANALOG SWITCH Analog Signal Range vs Drift ON R Match ON LEAKAGE CURRENTS Source OFF Leakage I (OFF) S Drain OFF Leakage I (OFF) D Channel ON Leakage (ON DIGITAL INPUTS Input High Voltage, V INH ...

Page 3

... Power Dissipation NOTES 1 Temperature ranges are as follows: B Versions: – + Versions: – +125 C. 2 Guaranteed by design, not subject to production test. Specifications subject to change without notice. Truth Table (ADG431/ADG432) ADG431 In ADG432 REV 10%, GND = O V, unless otherwise noted) ...

Page 4

... 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 ADG431/ADG432/ADG433 features proprietary ESD protection circuitry, perma- nent 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 ...

Page 5

... A +125 + 100nA Figure 5. Supply Current vs. Input Switching Frequency 0.04 0.02 0.00 –0.02 –0.04 –20 100 120 140 Figure 6. Leakage Currents as a Function of V –5– ADG431/ADG432/ADG433 +10V V = +12V ...

Page 6

... FREQUENCY – Hz Figure 8. Crosstalk vs. Frequency TRENCH ISOLATION In the ADG431A, ADG432A and ADG433A, an insulating oxide layer (trench) is placed between the NMOS and PMOS transistors of each CMOS switch. Parasitic junctions, which occur between the transistors in junction isolated switches, are eliminated, the result being a completely latch-up proof switch. ...

Page 7

... OUT2 Test Circuit 5. Break-Before-Make Time Delay +15V + OUT 10nF V OUT V GND SS –15V Test Circuit 6. Charge Injection –7– ADG431/ADG432/ADG433 Test Circuit 3. On Leakage 3V 50% 50% 3V 50% 50% 90% 90 OFF 3V V 50% 50 ...

Page 8

... ADG431/ADG432/ADG433 +15V +5V 0 GND SS 0.1 F –15V Test Circuit 7. Off Isolation 16-Lead Cerdip (Q-16) 0.005 (0.13) MIN 0.080 (2.03) MAX 16 9 0.310 (7.87) 0.220 (5.59 PIN 1 0.060 (1.52) 0.840 (21.34) MAX 0.015 (0.38) 0.200 (5.08) MAX 0.150 (3.81) 0.200 (5.08) MIN 0.125 (3.18) SEATING 0.023 (0.58) 0.100 0.070 (1.78) PLANE (2 ...

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