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ADG408 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADG408
Beschreibung High Performance Analog Multiplexers
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 15 Seiten
ADG408 Datasheet, Funktion
Data Sheet
LC2MOS 4-/8-Channel
High Performance Analog Multiplexers
ADG408/ADG409
FEATURES
44 V supply maximum ratings
VSS to VDD analog signal range
Low on resistance (100 Ω maximum)
Low power (ISUPPLY < 75 μA)
Fast switching
Break-before-make switching action
Plug-in replacement for DG408/DG409
APPLICATIONS
Audio and video routing
Automatic test equipment
Data acquisition systems
Battery-powered systems
Sample-and-hold systems
Communication systems
GENERAL DESCRIPTION
The ADG408/ADG409 are monolithic CMOS analog multiplexers
comprising eight single channels and four differential channels,
respectively. The ADG408 switches one of eight inputs to a
common output as determined by the 3-bit binary address lines
A0, A1, and A2. The ADG409 switches one of four differential
inputs to a common differential output, as determined by the
2-bit binary address lines A0 and A1. An EN input on both devices
is used to enable or disable the device. When the device is disabled,
all channels are switched off.
The ADG408/ADG409 are designed on an enhanced LC2MOS
process that provides low power dissipation yet gives high
switching speed and low on resistance. Each channel conducts
equally well in both directions when on and has an input signal
range that extends to the supplies. In the off condition, signal levels
up to the supplies are blocked. All channels exhibit break-before-
make switching action, preventing momentary shorting when
switching channels. Inherent in the design is low charge injection
for minimum transients when switching the digital inputs.
The ADG408/ADG409 are improved replacements for the
DG408/DG409 analog multiplexers.
FUNCTIONAL BLOCK DIAGRAMS
ADG408
S1
ADG409
S1A
DA
S4A
D
S1B
DB
S8 S4B
1-OF-8
DECODER
1-OF-4
DECODER
A0 A1 A2 EN
A0 A1 EN
Figure 1.
PRODUCT HIGHLIGHTS
1. Extended Signal Range. The ADG408/ADG409 are
fabricated on an enhanced LC2MOS process, giving an
increased signal range that extends to the supply rails.
2. Low Power Dissipation.
3. Low RON.
4. Single-Supply Operation. For applications where the
analog signal is unipolar, the ADG408/ADG409 can be
operated from a single rail power supply. The parts are
fully specified with a single 12 V power supply and remain
functional with single supplies as low as 5 V.
Rev. D
Document Feedback
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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.
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Tel: 781.329.4700 ©2001–2015 Analog Devices, Inc. All rights reserved.
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ADG408 Datasheet, Funktion
ADG408/ADG409
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
VDD to VSS
VDD to GND
VSS to GND
Analog, Digital Inputs
Continuous Current, S or D
Peak Current, S or D
(Pulsed at 1 ms, 10% Duty Cycle
Maximum)
Operating Temperature Range
Industrial (B Version)
Extended (T Version)
Storage Temperature Range
Junction Temperature
CERDIP Package, Power Dissipation
θJA, Thermal Impedance
Lead Temperature, Soldering
(10 sec)
PDIP Package, Power Dissipation
θJA, Thermal Impedance
Lead Temperature, Soldering
(10 sec)
TSSOP Package, Power Dissipation
θJA, Thermal Impedance
θJC, Thermal Impedance
SOIC Package, Power Dissipation
θJA, Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
Rating
44 V
−0.3 V to +32 V
+0.3 V to −32 V
VSS − 2 V to VDD + 2 V or 20 mA,
whichever occurs first
20 mA
40 mA
−40°C to +85°C
−55°C to +125°C
−65°C to +150°C
150°C
900 mW
76°C/W
300°C
470 mW
117°C/W
260°C
450 mW
155°C/W
50°C/W
600 mW
77°C/W
215°C
220°C
Data Sheet
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
Rev. D | Page 6 of 15

6 Page









ADG408 pdf, datenblatt
ADG408/ADG409
3V
ENABLE
DRIVE (VIN)
0V
tON (EN)
OUTPUT
50%
0.9VO
50%
tOFF (EN)
0.9VO
VIN
Data Sheet
VDD
VSS
VDD
A0
A1
A2
VSS
S1
S2–S8
VS
ADG4081
OUTPUT
EN D
50GND
300
35pF
1SIMILAR CONNECTION FOR ADG409.
Figure 24. Enable Delay, tON (EN), tOFF (EN)
VDD
VSS
3V
VIN
VOUT
QINJ = CL × VOUT
VOUT
RS
VS
VDD
A0
VSS
A1
A2
ADG4081
S
EN
VIN
GND
D
VOUT
CL
10nF
VDD
VSS
Figure 25. Charge Injection
1SIMILAR CONNECTION FOR ADG409.
VDD
VSS
VDD
A0
VSS
A1
ADG408
A2
D
VOUT
S1 1k
S8
VS 0V EN
GND
1k
VS
VDD
VSS
A0 EN
A1
ADG408
A2
2.4V
S1 D
VOUT
S2
S8
GND
1k
OFF ISOLATION = 20 log VOUT/VIN
Figure 26. Off Isolation
CROSSTALK = 20 log VOUT/VIN
Figure 27. Channel-to-Channel Crosstalk
Rev. D | Page 12 of 15

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