AD210 L-COM, AD210 Datasheet

AD210

Manufacturer Part Number

AD210

Description

FOM100 SERIES UNIV LC ADPTR

Manufacturer

L-COM

Datasheet

1.AD210.pdf (8 pages)

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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-

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

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.

FEATURES

High CMV Isolation: 2500 V rms Continuous

Small Size: 1.00"

Three-Port Isolation: Input, Output, and Power

Low Nonlinearity:

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

Low Gain Drift:

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

Isolated Power:

Uncommitted Input Amplifier

APPLICATIONS

Multichannel Data Acquisition

High Voltage Instrumentation Amplifier

Current Shunt Measurements

Process Signal Isolation

25 ppm/ C max

15 V @

2.10"

0.012% max

3500 V Peak Continuous

5 mA

0.350"

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 A 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) V/ 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"

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.

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

Tel: 617/329-4700

–V

COM

+IN

–IN

ISS

Precision, Wide Bandwidth

SUPPLY

POWER

FUNCTIONAL BLOCK DIAGRAM

INPUT

3-Port Isolation Amplifier

INPUT

MOD

PWR

OSCILLATOR

POWER

PWR COM

OUTPUT

DEMOD

FILTER

0.350". The low

AD210*

AD210

OUTPUT

SUPPLY

POWER

Fax: 617/326-8703

–V

COM

OSS

AD210 Summary of contents

Page 1

... 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. ...

Page 2

... ESD (electrostatic discharge) sensitive device. Elec- trostatic charges as high as 4000 V readily accumu- late on the human body and test equipment and can discharge without detection. Although the AD210 features proprietary ESD protection circuitry, per- manent 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 ...

Page 3

... PWR PWR COM Figure 1. AD210 Block Diagram USING THE AD210 The AD210 is very simple to apply in a wide range of ap- plications. Powered by a single +15 V power supply, the AD210 will provide outstanding performance when used as an input or output isolator, in single and multichannel configurations ...

Page 4

... PERFORMANCE CHARACTERISTICS Common-Mode Rejection: Figure 9 shows the common- mode rejection of the AD210 versus frequency, gain and input source resistance. For maximum common-mode rejection of unwanted signals, keep the input source resistance low and care- fully lay out the input, avoiding excessive stray capacitance at the input terminals ...

Page 5

... FREQUENCY – Hz Figure 10. Phase Shift and Gain vs. Frequency Input Noise vs. Frequency: Voltage noise referred to the input is dependent on gain and signal bandwidth. Figure 11 illustrates the typical input noise in nV the AD210 for a frequency range from kHz 100 FREQUENCY – ...

Page 6

... OSS Self-Powered Current Source The output circuit shown in Figure 18 can be used to create a self-powered output current source using the AD210. The 2 k resistor converts the voltage output of the AD210 to an equiva- –6– ( –V ( –V 100µF 0.1µF 1µF 10µF ...

Page 7

... The uncommitted input amplifier internal to the AD210 may be used for this purpose. For best results, its input offset voltage must be trimmed as shown. . The output voltage of the AD210 will go from –10 V for +28V digital inputs of 0 and full scale, respectively. However, since CURRENT ...

Page 8

... F to +212 F span. Channel 3: Channel low level input channel configured with a high gain amplifier used to condition millivolt signals. With the AD210’s input set to unity and the input amplifier set for a gain of 1000 input will produce the AD210’s output. shunt resistor Channel 4: Channel 4 illustrates one possible configuration for conditioning a bridge circuit ...