Analog Devices ADG467BR, ADG467BN, ADG466BRS, ADG466BRM, ADG466BN Datasheet

REV. A

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a

ADG466/ADG467

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1998

Triple and Octal

Channel Protectors

FUNCTIONAL BLOCK DIAGRAMS

ADG466

ADG467

V

D1

V

D2

V

D3

V

S1

V

S2

V

S3

V

D1

V

D2

V

D3

V

D8

V

S1

V

S2

V

S3

V

S8

VDDV

SS

VDDV

SS

V

IN

V

DD

V

DD

V

IN

V

OUT

OUTPUT CLAMPED
@ V

DD

– 1.5V

V

OUT

GENERAL DESCRIPTION

The ADG466 and ADG467 are triple and octal channel pro­tectors, respectively. The channel protector is placed in series
with the signal path. The channel protector will protect sensitive
components from voltage transience in the signal path whether
the power supplies are present or not. Because the channel
protection works whether the supplies are present or not, the
channel protectors are ideal for use in applications where
correct power sequencing can’t always be guaranteed (e.g., hot­insertion rack systems) to protect analog inputs. This is dis­cussed further, and some example circuits are given in the
Applications section of this data sheet.

Each channel protector has an independent operation and con­sists of an n-channel MOSFET, a p-channel MOSFET and an
n-channel MOSFET, connected in series. The channel protec­tor behaves just like a series resistor during normal operation,
i.e., (V

SS

+ 2 V) < VIN < (V

DD

– 1.5 V). When a channel’s ana-

log input exceeds the power supplies (including V

DD

and VSS =
0 V), one of the MOSFETs will switch off, clamping the output
to either V

SS

+ 2 V or VDD – 1.5 V. Circuitry and signal source
protection is provided in the event of an overvoltage or power
loss. The channel protectors can withstand overvoltage inputs
from –40 V to +40 V. See the Circuit Information section of
this data sheet.

The ADG466 and ADG467 can operate off both bipolar and
unipolar supplies. The channels are normally on when power is
connected and open circuit when power is disconnected. With

power supplies of ± 15 V, the on-resistance of the ADG466 and

FEATURES
Fault and Overvoltage Protection up to 640 V

Signal Paths Open Circuit with Power Off
Signal Path Resistance of R

ON

with Power On
44 V Supply Maximum Ratings
Low On Resistance

ADG466/ADG467 60 V typ
1 nA Max Path Current Leakage @ +258C
Low R

ON

Match (5 V max)
Low Power Dissipation 0.8 mW typ
Latch-Up Proof Construction

APPLICATIONS
ATE Equipment
Sensitive Measurement Equipment
Hot-Insertion Rack Systems

ADG467 is 60 Ω typ with a leakage current of ±1 nA max.

When power is disconnected, the input leakage current is ap-

proximately ±5 nA typ.
The ADG466 is available in 8-lead DIP, SOIC and µSOIC

packages. The ADG467 is available in an 18-lead SOIC package
and a 20-lead SSOP package.

PRODUCT HIGHLIGHTS

1. Fault Protection.
The ADG466 and ADG467 can withstand continuous volt­age inputs from –40 V to +40 V. When a fault occurs due to
the power supplies being turned off or due to an overvoltage
being applied to the ADG466 and ADG467, the output is
clamped. When power is turned off, current is limited to the
microampere level.

2. Low Power Dissipation.

3. Low R

ON

.

ADG466/ADG467 60 Ω typ.

4. Trench Isolation Latch-Up Proof Construction.
A dielectric trench separates the p- and n-channel MOSFETs
thereby preventing latch-up.

–2–

REV. A

ADG466/ADG467–SPECIFICATIONS

Dual Supply

1

ADG466 ADG467

Parameter +258CB

1

+258CB

1

Units Test Conditions/Comments

FAULT PROTECTED CHANNEL

Fault-Free Analog Signal Range

2

VSS + 1.2 VSS + 1.2 V min Output Open Circuit
V

DD

– 0.8 VDD – 0.8 V max

R

ON

60 75 62 80 Ω typ –10 V ≤ VS ≤ +10 V, I

S

= 1 mA

80 95 Ω max

∆R

ON

34 6 Ω max –5 V ≤ VS ≤ +5 V

R

ON

Match 4 6 5 6 Ω max VS = ±10 V, I

S

= 1 mA

LEAKAGE CURRENTS

Channel Output Leakage, I

S(ON)

VS = V

D

= ±10 V

(without Fault Condition) ±0.1 ±1 ±0.04 ±0.2 nA typ

±1 ±5 ±1 ±5 nA max

Channel Input Leakage, I

D(ON)

V

S

= ±25 V

(with Fault Condition) ±0.2 ±0.4 ±0.2 ±0.4 nA typ V

D

= Open Circuit

±2 ±5 ±2 ±5 nA max

Channel Input Leakage, I

D(OFF)

VDD = 0 V, V

SS

= 0 V

(with Power Off and Fault) ±0.5 ±2 ±0.5 ±2 nA typ V

S

= ±35 V,

±1 ±5 ±2 ±10 nA max V

D

= Open Circuit

Channel Input Leakage, I

D(OFF)

VDD = 0 V, V

SS

= 0 V

(with Power Off and Output S/C) ±0.005 ±0.1 ±0.006 ±0.16 µA typ V

S

= ±35 V, V

D

= 0 V

±0.015 ±0.5 ±0.015 ±0.5 µA max

POWER REQUIREMENTS

I

DD

±0.05 ±0.05 µA typ
±0.5 ±8 ±0.5 ±8 µA max

I

SS

±0.05 ±0.05 µA typ
±0.5 ±8 ±0.5 ±8 µA max

V

DD/VSS

0 0 0 0 V min

±20 ±20 ±20 ±20 V max

NOTES

1

Temperature range is as follows: B Version: – 40°C to +85°C.

2

Guaranteed by design, not subject to production test.

Specifications subject to change without notice.

(VDD = +15 V, VSS = –15 V, GND = 0 V, unless otherwise noted)

ADG466/ADG467

–3–

REV. A

ABSOLUTE MAXIMUM RATINGS

1

(T

A

= +25°C unless otherwise noted)

VDD to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +44 V

V

S

, VD, Analog Input Overvoltage with Power ON

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS – 20 V to VDD + 20 V

V

S

, VD, Analog Input Overvoltage with Power OFF

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–35 V to +35 V

Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . . 20 mA

Peak Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA

(Pulsed at 1 ms, 10% Duty Cycle Max)

Operating Temperature Range

Industrial (B Version) . . . . . . . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . . –65°C to +125°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C

Plastic DIP Package

θ

JA

, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 125°C/W

Lead Temperature, Soldering (10 sec) . . . . . . . . . . . +260°C

SOIC Package

θ

JA

, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 160°C/W

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C

µSOIC Package

θ

JA

, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 160°C/W

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C

SSOP Package

θ

JA

, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 130°C/W

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi­tions for extended periods may affect device reliability. Only one absolute maxi­mum rating may be applied at any one time.

2

Overvoltages at S or D will be clamped by the channel protector, see Circuit

Information section of the data sheet.

CAUTION

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 ADG466/ADG467 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.

PIN CONFIGURATIONS

8-Lead

DIP, SOIC 18-Lead
and mSOIC SOIC

1
2
3
4

8
7
6
5

TOP VIEW

(Not to Scale)

ADG466

V

D1

V

S3

V

S2

V

S1

V

DD

V

D2

V

D3

V

SS

14
13
12
11

17
16
15

18

10

9

8

1
2
3
4

7

6

5

TOP VIEW

(Not to Scale)

ADG467

V

D1

V

S3

V

S2

V

S1

V

DD

V

D2

V

D3

V

D4

V

S6

V

S5

V

S4

V

D5

V

D6

V

D7

V

D8

V

SS

V

S8

V

S7

20-Lead

SSOP

V

D1

V

S3

V

S2

V

S1

V

DD

V

D2

V

D3

V

D4

V

S6

V

S5

V

S4

V

D5

V

D6

V

D7

V

D8

V

SS

V

S8

V

S7

14
13
12
11

17
16
15

20
19
18

10

9

8

1
2
3
4

7

6

5

TOP VIEW

(Not to Scale)

ADG467

NC = NO CONNECT

NC

NC

ORDERING GUIDE

Model Temperature Range Package Description Package Options

ADG466BN –40°C to +85°C 8-Lead Plastic DIP N-8
ADG466BR –40°C to +85°C 8-Lead Small Outline Package SO-8
ADG466BRM –40°C to +85°C 8-Lead Micro Small Outline Package RM-8

ADG467BR –40°C to +85°C 18-Lead Small Outline Package R-18
ADG467BRS –40°C to +85°C 20-Lead Shrink Small Outline Package RS-20

WARNING!

ESD SENSITIVE DEVICE