adg429 Analog Devices, Inc., adg429 Datasheet

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adg429

Manufacturer Part Number
adg429
Description
Lc2mos Latchable 4-/8-channel High Performance Analog Multiplexers
Manufacturer
Analog Devices, Inc.
Datasheet

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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.
GENERAL DESCRIPTION
The ADG428 and ADG429 are monolithic CMOS analog
multiplexers comprising eight single channels and four differen-
tial channels respectively. On-chip address and control latches
facilitate microprocessor interfacing. The ADG428 switches one
of eight inputs to a common output as determined by the 3-bit
binary address lines A0, A1 and A2. The ADG429 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 disabled, all channels are switched OFF. All the control
inputs, address and enable inputs are TTL compatible over the
full specified operating temperature range. This makes the part
suitable for bus-controlled systems such as data acquisition sys-
tems, process controls, avionics and ATEs because the TTL-
compatible address latches simplify the digital interface design
and reduce the board space required.
The ADG428/ADG429 are designed on an enhanced LC
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 mini-
mum transients when switching the digital inputs.
The ADG428/ADG429 are improved replacements for the
DG428/DG429 Analog Multiplexers.
REV. C
FEATURES
44 V Supply Maximum Ratings
V
Low On Resistance (60
Low Power Consumption (1.6 mW max)
Low Charge Injection (<4 pC typ)
Fast Switching
Break-Before-Make Switching Action
Plug-In Replacement for DG428/DG429
APPLICATIONS
Automatic Test Equipment
Data Acquisition Systems
Communication Systems
Avionics and Military Systems
Microprocessor Controlled Analog Systems
Medical Instrumentation
SS
to V
DD
Analog Signal Range
typ)
High Performance Analog Multiplexers
2
MOS
LC
PRODUCT HIGHLIGHTS
1. Extended Signal Range
2. Low Power Dissipation
3. Low R
4. Single/Dual Supply Operation
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
WR
S8
S1
The ADG428/ADG429 are fabricated on an enhanced
LC
tends to the supply rails.
For applications where the analog signal is unipolar, the
ADG428/ADG429 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.
2
MOS Latchable 4-/8-Channel
2
A2
DECODERS/DRIVERS
MOS process, giving an increased signal range that ex-
ON
ADG428
LATCHES
A1
FUNCTIONAL BLOCK DIAGRAMS
A0
World Wide Web Site: http://www.analog.com
EN
ADG428/ADG429
D
RS
S1A
S4A
S1B
S4B
WR
© Analog Devices, Inc., 1999
DECODERS/DRIVERS
A1
ADG429
LATCHES
A0
EN
DA
DB
RS

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adg429 Summary of contents

Page 1

... On-chip address and control latches facilitate microprocessor interfacing. The ADG428 switches one of eight inputs to a common output as determined by the 3-bit binary address lines A0, A1 and A2. The ADG429 switches one of four differential inputs to a common differential output as determined by the 2-bit binary address lines A0 and A1 input on both devices is used to enable or disable the device ...

Page 2

... S C (OFF) D ADG428 ADG429 (ON ADG428 ADG429 POWER REQUIREMENTS NOTES 1 Temperature ranges are as follows: B Version: – + Version: – +125 C. 2 Guaranteed by design, not subject to production test. Specifications subject to change without notice. = –15 V, GND = 2.4 V unless otherwise noted) ...

Page 3

... ADG428/ADG429 Units Test Conditions/Comments V typ –500 max % max 0 V < V < – typ V V/ max ...

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 ADG428/ADG429 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 ...

Page 5

... ADG429 Truth Table SWITCH PAIR Maintains Previous Switch Condition NONE (Latches Cleared NONE ...

Page 6

... ADG428/ADG429 TIMING DIAGRAMS A0, A1, (A2 Figure 1. Figure 1 shows the timing sequence for latching the switch address and enable inputs. The latches are level sensitive; there- fore, while WR is held low, the latches are transparent and the switches respond to the address and enable inputs ...

Page 7

... Supply) Figure 11. Switching Time vs 500 V = +5V IN 450 400 350 300 250 t (EN) ON 200 150 100 13 15 Figure 12. Switching Time vs. Single Supply –7– ADG428/ADG429 V = +15V –15V 2. 100 1k 10k 100k SWITCHING FREQUENCY – +12V t DD TRANSITION V ...

Page 8

... ADG428/ADG429 100 100 1k 10k 100k FREQUENCY – Hz Figure 13. OFF Isolation vs. Frequency 0 +15V –15V + 0 (OFF) D –0.1 –15 –10 – – Volts D S Figure 14. Leakage Currents as a Function of V 110 V = +15V DD 105 V = – ...

Page 9

... S2–S7 A2 ADG428 2.4V EN OUTPUT GND *SIMILAR CONNECTION FOR ADG429 TRANSITION S2–S7 A2 ADG428* S8 2.4V EN OUTPUT GND 1k *SIMILAR CONNECTION FOR ADG429 OPEN 35pF 35pF ...

Page 10

... S2–S8 A2 ADG428* 2.4V EN OUTPUT GND *SIMILAR CONNECTION FOR ADG429 ( S2–S8 A2 ADG428* 2.4V EN OUTPUT GND V IN *SIMILAR CONNECTION FOR ADG429 ( RS ) OFF 35pF 35pF REV. C ...

Page 11

... Test Circuit 10. Charge Injection RS 2. OUT 1k –11– ADG428/ADG429 2. ADG428 OUT 10nF V WR GND IN *SIMILAR CONNECTION FOR ADG429 ADG428 GND Test Circuit 12. Crosstalk 2.4V V OUT ...

Page 12

... ADG428/ADG429 PLCC (P-20A) 0.180 (4.57) 0.165 (4.19) 0.048 (1.21) 0.056 (1.42) 0.042 (1.07) 0.042 (1.07) 0.048 (1.21 0.042 (1.07 PIN 1 0.050 IDENTIFIER (1.27) TOP VIEW BSC (PINS DOWN 0.020 (0.50) 0.356 (9.04 0.350 (8.89) 0.110 (2.79) 0.395 (10.02) SQ 0.085 (2.16) 0.385 (9.78) Plastic DIP (N-18) 0.910 (23.12) 0.890 (22.61 0.260 (6.61) 0.240 (6.10 PIN 1 0.180 (4 ...

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