ADG508FTQ AD [Analog Devices], ADG508FTQ Datasheet

ADG508FTQ

Manufacturer Part Number

ADG508FTQ

Description

4/8 Channel Fault-Protected Analog Multiplexers

Manufacturer

AD [Analog Devices]

Datasheet

1.ADG508FTQ.pdf (12 pages)

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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.

Supplies If an Overvoltage Occurs

and Nonfault-Protected)

OFF

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

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

ON.

FUNCTIONAL BLOCK DIAGRAMS

ADG508F/ADG528F

Temperature Range

–40 C to +85 C

–55 C to +125 C

–40 C to +85 C

–55 C to +125 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

S1A

S4A

S1B

S4B

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

Related parts for ADG508FTQ

ADG508FTQ Summary of contents

Page 1

... ORDERING GUIDE 1 Model Temperature Range ADG508FBN – +85 C ADG508FBRN – +85 C ADG508FBRW – +85 C ADG508FTQ – +125 C ADG509FBN – +85 C ADG509FBRN – +85 C ADG509FBRW – +85 C ADG509FTQ – +125 C ADG528FBN – ...

Page 2

ADG508F/ADG509F/ADG528F–SPECIFICATIONS Dual Supply (V = + Parameter +25 C +85 C ANALOG SWITCH Analog Signal Range R 300 ON R Drift 0 Match 5 ON LEAKAGE CURRENTS Source OFF Leakage I (OFF) S Drain ...

Page 3

Table I. ADG508F Truth Table ...

Page 4

ADG508F/ADG509F/ADG528F ABSOLUTE MAXIMUM RATINGS +25 C unless otherwise noted ...

Page 5

TERMINOLOGY V Most positive power supply potential Most negative power supply potential. SS GND Ground (0 V) reference. R Ohmic resistance between D and Drift Change in R when temperature changes one ...

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 ...

Page 7

THEORY OF OPERATION The ADG508F/ADG509F/ADG528F multiplexers are capable of withstanding overvoltages from – +55 V, irrespective of whether the power supplies are present or not. Each channel of the multiplexer consists of an n-channel MOSFET channel ...

Page 8

ADG508F/ADG509F/ADG528F Test Circuits Test Circuit 1. On Resistance (OFF Test Circuit ...

Page 9

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

Page 10

ADG508F/ADG509F/ADG528F S2–S8 A0 ADG528F +2. GND ADG528F ...

Page 11

Plastic (N-16) 0.840 (21.34) 0.745 (18.92 0.280 (7.11) 0.240 (6.10 PIN 1 0.060 (1.52) 0.015 (0.38) 0.210 (5.33) MAX 0.130 (3.30) 0.160 (4.06) MIN 0.115 (2.93) 0.100 0.070 (1.77) SEATING 0.022 (0.558) PLANE (2.54) 0.045 ...

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 ...

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