ADG508F Analog Devices, ADG508F Datasheet

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ADG508F

Manufacturer Part Number
ADG508F
Description
4/8 Channel Fault-Protected Analog Multiplexers
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
The ADG508F, ADG509F and ADG528F are CMOS analog
multiplexers, the ADG508F and ADG528F comprising eight
single channels and the ADG509F comprising four differential
channels. These multiplexers provide fault protection. Using a
series n-channel, p-channel, n-channel MOSFET structure,
both device and signal source protection is provided in the event
of an overvoltage or power loss. The multiplexer can withstand
continuous overvoltage inputs from –40 V to +55 V. During
fault conditions, the multiplexer input (or output) appears as an
open circuit and only a few nanoamperes of leakage current will
flow. This protects not only the multiplexer and the circuitry
driven by the multiplexer, but also protects the sensors or signal
sources that drive the multiplexer.
The ADG508F and ADG528F switch one of eight inputs to a
common output as determined by the 3-bit binary address lines
A0, A1 and A2. The ADG509F switches one of four differential
inputs to a common differential output as determined by the 2-
bit binary address lines A0 and A1. The ADG528F has on-chip
address and control latches that facilitate microprocessor inter-
facing. An EN input on each device is used to enable or disable
the device. When disabled, all channels are switched OFF.
PRODUCT HIGHLIGHTS
1. Fault Protection.
*Patent Pending.
REV. C
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
Low On Resistance (300
Fast Switching Times
Low Power Dissipation (3.3 mW max)
Fault and Overvoltage Protection (–40 V to +55 V)
All Switches OFF with Power Supply OFF
Analog Output of ON Channel Clamped Within Power
Latch-Up Proof Construction
Break Before Make Construction
TTL and CMOS Compatible Inputs
APPLICATIONS
Existing Multiplexer Applications (Both Fault-Protected
New Designs Requiring Multiplexer Functions
The ADG508F/ADG509F/ADG528F can withstand con-
tinuous voltage inputs from –40 V to +55 V. When a fault
occurs due to the power supplies being turned off, all the
channels are turned off and only a leakage current of a few
nanoamperes flows.
t
t
Supplies If an Overvoltage Occurs
and Nonfault-Protected)
ON
OFF
250 ns max
250 ns max
typ)
ADG508F/ADG509F/ADG528F*
2. ON channel turns off while fault exists.
3. Low R
4. Fast Switching Times.
5. Break-Before-Make Switching.
6. Trench Isolation Eliminates Latch-up.
Model
ADG508FBN
ADG508FBRN
ADG508FBRW
ADG508FTQ
ADG509FBN
ADG509FBRN
ADG509FBRW
ADG509FTQ
ADG528FBN
ADG528FBP
ADG528FTQ
NOTES
1
2
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
To order MIL-STD-883, Class B processed parts, add /883B to T grade part
N = Plastic DIP; P = Plastic Leaded Chip Carrier (PLCC); Q = Cerdip;
numbers.
RN = 0.15" Small Outline IC (SOIC), RW = 0.3" Small Outline IC (SOIC).
ADG528F
Switches are guaranteed break-before-make so that input
signals are protected against momentary shorting.
A dielectric trench separates the p and n-channel MOSFETs
thereby preventing latch-up.
ONLY
4/8 Channel Fault-Protected
1
ON.
WR
S1
S8
RS
FUNCTIONAL BLOCK DIAGRAMS
ADG508F/ADG528F
A0
Temperature Range
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
DECODER
A1 A2 EN
1 OF 8
ORDERING GUIDE
World Wide Web Site: http://www.analog.com
Analog Multiplexers
D
S1A
S4A
S1B
S4B
© Analog Devices, Inc., 1998
A0
DECODER
ADG509F
1 OF 4
Package Option
N-16
R-16N
R-16W
Q-16
N-16
R-16N
R-16W
Q-16
N-18
P-20A
Q-18
A1
EN
DA
DB
2

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ADG508F Summary of contents

Page 1

... This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources that drive the multiplexer. The ADG508F and ADG528F switch one of eight inputs to a common output as determined by the 3-bit binary address lines A0, A1 and A2. The ADG509F switches one of four differential inputs to a common differential output as determined by the 2- bit binary address lines A0 and A1 ...

Page 2

... Reset Pulsewidth RS Charge Injection 4 OFF Isolation (OFF (OFF) D ADG508F/ADG528F 50 ADG509F 25 POWER REQUIREMENTS I 0 0.1 SS 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. ...

Page 3

... Table I. ADG508F Truth Table Don’t Care ...

Page 4

... Although these devices feature 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. ADG508F/ADG509F PIN CONFIGURATIONS mA, ...

Page 5

... Charge Injection A measure of the glitch impulse transferred from the digital input to the analog output during switching. I Positive supply current Negative supply current. SS REV. C ADG508F/ADG509F/ADG528F Typical Performance Graphs 2000 1750 1500 1250 1000 of any two ON 750 500 250 0 – ...

Page 6

... ADG508F/ADG509F/ADG528F 2000 1750 V 1500 V 1250 1000 750 +125 C +85 C 500 250 0 –15 –10 – – Volts D S Figure 6. On Resistance as a Function of V Different Temperatures 1m 100 10 1 100n 10n OPERATING RANGE 1n 100p 10p 1p –50 –40 –30 –20 – – INPUT VOLTAGE – Volts IN Figure 7 ...

Page 7

... MOSFET is negative. During fault conditions, the leakage current into and out of the ADG508F/ADG509F/ADG528F is limited to a few microamps. This protects the multiplexer and succeeding circuitry from over stresses as well as protecting the signal sources which drive the multiplexer ...

Page 8

... V S Test Circuit 5. Input Leakage Current (with Overvoltage ADG528F GND * SIMILAR CONNECTION FOR ADG508F/ADG509F Test Circuit 6. Input Leakage Current (with Power Supplies OFF) 50% 50% 90% 90 TRANSITION TRANSITION TRANSITION REV. C ...

Page 9

... S2–S7 A0 ADG528F RS +2. GND * SIMILAR CONNECTION FOR ADG508F/ADG509F S2– ADG528F RS +2. GND * SIMILAR CONNECTION FOR ADG508F/ADG509F S2–S8 A0 ADG528F +2. GND REV ...

Page 10

... V OUT Test Circuit 12. Charge Injection ADG528F RS +2. GND SIMILAR CONNECTION FOR ADG508F/ADG509F Test Circuit 13. OFF Isolation –10– 50% 50 (RS) OFF 0. OFF V OUT INJ L OUT OUT REV. C ...

Page 11

... PIN 1 0.0098 (0.25) 0.0532 (1.35) 0.0040 (0.10) 0.0500 0.0192 (0.49) SEATING 0.0099 (0.25) (1.27) 0.0138 (0.35) PLANE BSC 0.0075 (0.19) REV. C ADG508F/ADG509F/ADG528F OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 0.005 (0.13) MIN 0.325 (8.26) 0.195 (4.95) 0.300 (7.62) 0.115 (2.93) 0.200 (5.08) MAX 0.200 (5.08) 0.015 (0.381) 0.125 (3.18) 0.008 (0.204) 0.023 (0.58) 0.014 (0.36 0.0196 (0.50 ...

Page 12

... ADG508F/ADG509F/ADG528F 18-Lead Plastic (N-18) 0.925 (23.49) 0.845 (21.47 0.280 (7.11) 0.240 (6.10 PIN 1 0.060 (1.52) 0.210 0.015 (0.38) (5.33) MAX 0.160 (4.06) 0.115 (2.93) SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE (2.54) 0.014 (0.356) 0.045 (1.15) BSC 0.048 (1.21) 0.042 (1.07) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 0.005 (0.13) MIN 0.325 (8.25) 0.195 (4.95) 0.300 (7.62) 0.115 (2.93) 0.200 (5.08) ...

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