ADG465BRTZ-REEL7 Analog Devices Inc, ADG465BRTZ-REEL7 Datasheet

ADG465BRTZ-REEL7

Manufacturer Part Number

ADG465BRTZ-REEL7

Description

IC CHANNEL PROTECTOR SGL SOT23-6

Manufacturer

Analog Devices Inc

Series

ADG465r

Datasheet

1.ADG465BRTZ-REEL7.pdf (8 pages)

Specifications of ADG465BRTZ-REEL7

Voltage - Clamping

±40V

Technology

Mixed Technology

Number Of Circuits

Applications

General Purpose

Package / Case

SOT-23-6

No. Of Channels

On State Resistance Max

80ohm

Supply Voltage Range

Â± 20V

Operating Temperature Range

-40Â°C To +85Â°C

Analog Switch Case Style

SOT-23

No. Of Pins

Msl

MSL 1 - Unlimited

Operating Temperature (min)

-40C

Operating Temperature (max)

85C

Operating Temperature Classification

Industrial

Mounting

Surface Mount

Pin Count

Package

6SOT-23

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power (watts)

Voltage - Working

Lead Free Status / Rohs Status

Compliant

Other names

ADG465BRTZ-REEL7

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REV. 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 ADG465 is a single channel protector in an SOT-23 pack-

age. The channel protector is placed in series with the signal

path, and will protect sensitive components from voltage tran-

sience in the signal path whether or not the power supplies are

present. Because the channel protection works regardless of the

presence of the supplies, the channel protectors are ideal for use

in applications where correct power sequencing cannot always

be guaranteed to protect analog inputs (e.g., hot-insertion rack

systems). This is discussed further, and some example circuits

are given, in the Applications section of this data sheet.

A channel protector consists of an n-channel MOSFET, a

p-channel MOSFET and an n-channel MOSFET, connected in

series. The channel protector behaves like a series resistor dur-

ing normal operation, i.e., (V

When a channel’s analog input exceeds the power supplies

(including V

switch off, clamping the output to either V

Circuitry and signal source protection is provided in the event of

an overvoltage or power loss. The channel protectors can with-

stand overvoltage inputs from –40 V to +40 V. See the Circuit

Information section of this data sheet.

The ADG465 can operate from both bipolar and unipolar

supplies. The channels are normally on when power is con-

nected, and open circuit when power is disconnected. With

power supplies of 15 V, the on-resistance of the ADG465 is

is disconnected, the input leakage current is approximately

The ADG465 is available in a 6-lead plastic surface mount

SOT-23 package, and an 8-lead SOIC package.

5 nA typ.

FEATURES

Fault and Overvoltage Protection up to

44 V Supply Maximum Ratings

Low On Resistance 80

1 nA Max Path Current Leakage @ +25 C

Low Power Dissipation 0.8 W Typ

Latchup-Proof Construction

APPLICATIONS

ATE Equipment

Sensitive Measurement Equipment

Hot-Insertion Rack Systems

ADC Input Channel Protection

typ, with a leakage current of 1 nA max. When power

Signal Paths Open Circuit with Power Off

Signal Path Resistance of R

and V

= 0 V), one of the MOSFETs will

+ 2 V) < V

Typ

with Power On

< (V

+ 2 V or V

40 V

– 1.5 V).

– 1.5 V.

PRODUCT HIGHLIGHTS

1. Fault Protection.

2. Low Power Dissipation.

3. Low R

4. Trench Isolation Latchup-Proof Construction.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

The ADG465 can withstand continuous voltage inputs from

–40 V to +40 V. When a fault occurs due to the power sup-

plies being turned off, or due to an overvoltage being applied

to the ADG465, the output is clamped. When power is turned

off, current is limited to the nanoampere level.

A dielectric trench separates the p- and n-channel MOSFETs

thereby preventing latchup.

Single Channel Protector

FUNCTIONAL BLOCK DIAGRAM

typ.

in an SOT-23 Package

World Wide Web Site: http://www.analog.com

ADG465

OUTPUT CLAMPED

@ V

– 1.5V

ADG465

OUT

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ADG465BRTZ-REEL7 Summary of contents

Page 1

FEATURES Fault and Overvoltage Protection up to Signal Paths Open Circuit with Power Off Signal Path Resistance Supply Maximum Ratings Low On Resistance 80 Typ 1 nA Max Path Current Leakage @ +25 C ...

Page 2

ADG465–SPECIFICATIONS 1 Dual Supply ( –15 V, GND = 0 V, unless otherwise noted Parameter FAULT PROTECTED CHANNEL 2 Fault-Free Analog Signal Range LEAKAGE CURRENTS Channel Output Leakage, I ...

Page 3

ABSOLUTE MAXIMUM RATINGS (T = +25 C unless otherwise noted ...

Page 4

ADG465 —Typical Performance Characteristics 140 TEMP = +25 C 130 120 110 –5V 100 +10V –10V –10 – ...

Page 5

CIRCUIT INFORMATION Figure 6 below shows a simplified schematic of a channel pro- tector circuit. The circuit is comprised of four MOS transis- tors—two NMOS and two PMOS. One of the PMOS devices does not lie directly in the signal ...

Page 6

ADG465 When a negative overvoltage is applied to the channel protector circuit, the PMOS transistor enters a saturated mode of operation as the drain voltage exceeds V – See Figure 9 below the case ...

Page 7

... In addition, TVSs offer no protection against latchup of sensitive CMOS devices when the power supplies are off. To provide the best leakage current specification and circuit protection, the best solution is to use a channel protector in conjunction with a TVS. Figure 13 shows an input protection scheme that uses both a TVS and channel protector ...

Page 8

ADG465 0.071 (1.80) 0.059 (1.50) 0.051 (1.30) 0.035 (0.90) 0.006 (0.15) 0.002 (0.05) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 6-Lead Plastic Surface Mount SOT-23 Package (RT-6) 0.122 (3.10) 0.106 (2.70 0.118 (3.00) 0.098 (2.50) 1 ...

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