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

Tel: 617/329-4700

Fax: 617/326-8703

FUNCTIONAL BLOCK DIAGRAM

INPUT

POWER

SUPPLY

19

14

15

16

17

18

30

29

T2

POWER

POWER

OSCILLATOR

INPUT

OUTPUT

MOD

DEMOD

FILTER

1

2

OUTPUT

POWER

SUPPLY

3

4

AD210

PWR COM

PWR

T3

T1

+IN

–IN

FB

a

Precision, Wide Bandwidth

3-Port Isolation Amplifier

AD210*

FEATURES

High CMV Isolation: 2500 V rms Continuous

3500 V Peak Continuous

Small Size: 1.00"

2.10"

0.350"

Three-Port Isolation: Input, Output, and Power

Low Nonlinearity:

0.012% max

Wide Bandwidth: 20 kHz Full-Power (–3 dB)

Low Gain Drift:

25 ppm/ C max

High CMR: 120 dB (G = 100 V/V)

Isolated Power:

15 V @

5mA

Uncommitted Input Amplifier

APPLICATIONS

Multichannel Data Acquisition

High Voltage Instrumentation Amplifier

Current Shunt Measurements

Process Signal Isolation

GENERAL DESCRIPTION

The AD210 is the latest member of a new generation of low

cost, high performance isolation amplifiers. This three-port,

wide bandwidth isolation amplifier is manufactured with sur-

face-mounted components in an automated assembly process.

The AD210 combines design expertise with state-of-the-art

manufacturing technology to produce an extremely compact

and economical isolator whose performance and abundant user

features far exceed those offered in more expensive devices.

The AD210 provides a complete isolation function with both

signal and power isolation supplied via transformer coupling in-

ternal to the module. The AD210’s functionally complete de-

sign, powered by a single +15 V supply, eliminates the need for

an external DC/DC converter, unlike optically coupled isolation

devices. The true three-port design structure permits the

AD210 to be applied as an input or output isolator, in single or

multichannel applications. The AD210 will maintain its high

performance under sustained common-mode stress.

Providing high accuracy and complete galvanic isolation, the

AD210 interrupts ground loops and leakage paths, and rejects

common-mode voltage and noise that may other vise degrade

measurement accuracy. In addition, the AD210 provides pro-

tection from fault conditions that may cause damage to other

sections of a measurement system.

PRODUCT HIGHLIGHTS

The AD210 is a full-featured isolator providing numerous user

benefits including:

High Common-Mode Performance:

The AD210 provides

2500 V rms (Continuous) and

± 3500 V peak (Continuous) common-

mode voltage isolation between any two ports. Low input

capacitance of 5 pF results in a 120 dB CMR at a gain of 100,

and a low leakage current (2

µA rms max @ 240 V rms, 60 Hz).

High Accuracy:

With maximum nonlinearity of

±0.012% (B

Grade), gain drift of

±25 ppm/°C max and input offset drift of

(

±10 ±30/G) µV/°C, the AD210 assures signal integrity while

providing high level isolation.

Wide Bandwidth:

The AD210’s full-power bandwidth of

20 kHz makes it useful for wideband signals. It is also effective

in applications like control loops, where limited bandwidth

could result in instability.

Small Size:

The AD210 provides a complete isolation function

in a small DIP package just 1.00"

× 2.10" × 0.350". The low

profile DIP package allows application in 0.5" card racks and

assemblies. The pinout is optimized to facilitate board layout

while maintaining isolation spacing between ports.

Three-Port Design:

The AD210’s three-port design structure

allows each port (Input, Output, and Power) to remain inde-

pendent. This three-port design permits the AD210 to be used

as an input or output isolator. It also provides additional system

protection should a fault occur in the power source.

Isolated Power:

±15 V @ 5 mA is available at the input and

output sections of the isolator. This feature permits the AD210

to excite floating signal conditioners, front-end amplifiers and

remote transducers at the input as well as other circuitry at the

output.

Flexible Input:

An uncommitted operational amplifier is pro-

vided at the input. This amplifier provides buffering and gain as

required and facilitates many alternative input functions as

required by the user.

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.

REV. A

*Covered by U.S. Patent No. 4,703,283.