ANALOG DEVICES ADG408 Service Manual

LC2MOS 4-/8-Channel

High Performance Analog Multiplexers

FEATURES

44 V supply maximum ratings

to VDD analog signal range

V

SS

Low on resistance (100 Ω maximum)
Low power (I
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 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 break­before-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.

SUPPLY

< 75 μA)

2

MOS

ADG408/ADG409

FUNCTIONAL BLOCK DIAGRAMS

ADG408

S1

S8

1-OF-8

DECODER

S1A

S4A

D

S1B

S4B

Figure 1.

PRODUCT HIGHLIGHTS

1. Extended Signal Range. The ADG408/ADG409 are

fabricated on an enhanced LC
increased signal range that extends to the supply rails.

2. Low Power Dissipation.

3. Low R

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.

ON

.

ADG409

1-OF-4

DECODER

A0 A1 E NA0 A1 A2 EN

2

MOS process, giving an

DA

DB

00027-001

The ADG408/ADG409 are improved replacements for the
DG408/DG409 analog multiplexers.

Rev. C

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ADG408/ADG409

TABLE OF CONTENTS

Features.............................................................................................. 1

Absolute Maximum Ratings ............................................................6

Applications....................................................................................... 1

Functional Block Diagrams............................................................. 1

General Description ......................................................................... 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Dual Supply................................................................................... 3

Single Supply................................................................................. 4

REVISION HISTORY

10/06—Rev. B to Rev. C

Updated Format..................................................................Universal

Changes to Table 3............................................................................ 6

Inserted Table 4 and Table 5............................................................ 7

Updated Outline Dimensions....................................................... 14

Changes to Ordering Guide.......................................................... 15

ESD Caution...................................................................................6

Pin Configurations and Function Descriptions............................7

Typical Performance Characteristics..............................................8

Test Circuits..................................................................................... 11

Terminology.................................................................................... 13

Outline Dimensions....................................................................... 14

Ordering Guide .......................................................................... 16

3/03—Rev. A to Rev. B

Changes to Ordering Guide.............................................................4

Updated Outline Dimensions....................................................... 11

2/01—Revision 0: Initial Version

Rev. C | Page 2 of 16

ADG408/ADG409

SPECIFICATIONS

DUAL SUPPLY

VDD = 15 V, VSS = −15 V, GND = 0 V, unless otherwise noted.

Table 1.

B Version T Version

−40ºC to

Parameter +25ºC

+85ºC

+25ºC

ANALOG SWITCH

Analog Signal Range VSS to VDD VSS to VDD V
RON 40 40 Ω typ
100 125 100 125 Ω max
∆RON 15 15 Ω max

LEAKAGE CURRENTS

Source Off Leakage IS (OFF) ±0.5 ±50 ±0.5 ±50 nA max VD = ±10 V, VS = 10 V; see mFigure 19
Drain Off Leakage ID (OFF) VD = ±10 V; VS = 10 V; see m Figure 20

ADG408 ±1 ±100 ±1 ±100 nA max
ADG409 ±1 ±50 ±1 ±50 nA max

Channel On Leakage ID, IS (ON) VS = VD = ±10 V; see Figure 21

ADG408 ±1 ±100 ±1 ±100 nA max
ADG409 ±1 ±50 ±1 ±50 nA max

DIGITAL INPUTS

Input High Voltage, V
Input Low Voltage, V

2.4 2.4 V min

INH

0.8 0.8 V max

INL

Input Current

I

or I

±10 ±10 μA max VIN = 0 or VDD

INL

INH

CIN, Digital Input Capacitance 8 8 pF typ f = 1 MHz

DYNAMIC CHARACTERISTICS

t

120 120 ns typ RL = 300 Ω, CL = 35 pF;

TRANSITION

1

250 250 ns max VS1 = ±10 V, VS8 = 10 V; see m Figure 22
t

10 10 10 10 ns min RL = 300 Ω, CL = 35 pF;

OPEN

V
tON (EN) 85 125 85 125 ns typ RL = 300 Ω CL = 35 pF;
150 225 150 225 ns max VS = 5 V; see Figure 24
t

(EN) 65 65 ns typ RL = 300 Ω, CL = 35 pF;

OFF

150 150 ns max VS = 5 V; see Figure 24
Charge Injection 20 20 pC typ VS = 0 V, RS = 0 Ω, CL = 10 nF; see Figure 25
OFF Isolation

−75

−75

V
Channel-to-Channel Crosstalk 85 85 dB typ RL = 1 kΩ, f = 100 kHz; see Figure 27
CS (OFF) 11 11 pF typ f = 1 MHz
CD (OFF) f = 1 MHz

ADG408 40 40 pF typ
ADG409 20 20 pF typ

CD, CS (ON) f = 1 MHz

ADG408 54 54 pF typ
ADG409 34 34 pF typ

−55ºC to
+125ºC

Unit Test Conditions/Comments

V

= ±10 V, IS = −10 mA

D

V

= +10 V, −10 V

D

= 5 V; see Figure 23

S

dB typ RL = 1 kΩ, f = 100 kHz;

= 0 V; see Figure 26

EN

Rev. C | Page 3 of 16

ADG408/ADG409

B Version T Version

−40ºC to

Parameter +25ºC

+85ºC

+25ºC

POWER REQUIREMENTS

IDD 1 1 μA typ VIN = 0 V, VEN = 0 V
5 5 μA max
ISS 1 1 μA typ
5 5 μA max
IDD 100 100 μA typ VIN = 0 V, VEN = 2.4 V

200 500 200 500 μA max

1

Guaranteed by design, not subject to production test.

SINGLE SUPPLY

VDD = 12 V, VSS = 0 V, GND = 0 V, unless otherwise noted.

Table 2.

B Version T Version

−40ºC to

Parameter +25ºC

+85ºC

ANALOG SWITCH

Analog Signal Range 0 to VDD 0 to VDD V
RON 90 90 Ω typ VD = 3 V, 10 V, IS = –1 mA

LEAKAGE CURRENTS

Source Off Leakage IS (OFF) ±0.5 ±50 ±0.5 ±50 nA max VD = 8 V/0 V, VS = 0 V/8 V; see Figure 19
Drain Off Leakage ID (OFF) VD = 8 V/0 V, VS = 0 V/8 V; see Figure 20

ADG408 ±1 ±100 ±1 ±100 nA max
ADG409 ±1 ±50 ±1 ±50 nA max

Channel On Leakage ID, IS (ON) VS = VD = 8 V/0 V; see Figure 21

ADG408 ±1 ±100 ±1 ±100 nA max
ADG409 ±1 ±50 ±1 ±50 nA max

DIGITAL INPUTS

Input High Voltage, V
Input Low Voltage, V

2.4 2.4 V min

INH

0.8 0.8 V max

INL

Input Current

I

or I

±10 ±10 μA max VIN = 0 or VDD

INL

INH

C

Digital Input Capacitance 8 8 pF typ f = 1 MHz

IN,

DYNAMIC CHARACTERISTICS

t

130 130 ns typ RL = 300 Ω, CL = 35 pF;

TRANSITION

1

V
t

OPEN

10 10 ns typ

V
tON (EN) 140 140 ns typ RL = 300 Ω CL = 35 pF;
V
t

(EN) 60 60 ns typ RL = 300 Ω, CL = 35 pF;

OFF

V

Charge Injection 5 5 pC typ VS = 0 V, RS = 0Ω, CL = 10 nF; see Figure 25
Off Isolation –75 –75 dB typ RL = 1 kΩ f = 100 kHz;
V

+25°C

−55ºC to
+125ºC

−55ºC to
+125ºC

Unit Test Conditions/Comments

Unit Test Conditions/Comments

= 8 V/0 V, VS8 = 0 V/8 V; see Figure 22

S1

RL = 300 Ω, CL = 35 pF;

= 5 V; see Figure 23

S

= 5 V; see Figure 24

S

= 5 V; see Figure 24

S

= 0 V; see Figure 26

EN

Rev. C | Page 4 of 16

ADG408/ADG409

B Version T Version

−40ºC to

Parameter +25ºC

+85ºC

+25°C

Channel-to-Channel Crosstalk 85 85 dB typ RL = 1 kΩ, f = 100 kHz; see Figure 27
CS (OFF) 11 11 pF typ f = 1 MHz
CD (OFF) f = 1 MHz

ADG408 40 40 pF typ
ADG409 20 20 pF typ

CD, CS (ON) f = 1 MHz

ADG408 54 54 pF typ
ADG409 34 34 pF typ

POWER REQUIREMENTS

IDD 1 1 μA typ VIN = 0 V, VEN = 0 V
5 5 μA max
IDD 100 100 μA typ VIN = 0 V, VEN = 2.4 V

200 500 200 500 μA max

1

Guaranteed by design, not subject to production test.

−55ºC to
+125ºC

Unit Test Conditions/Comments

Rev. C | Page 5 of 16