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廬

ISO

255

ISO255

Precision, Powered, Three-Port Isolated

INSTRUMENTATION AMPLIFIER

FEATURES

q

RATED

1500Vrms Continuous

2500Vrms for One Minute

100% Tested for Partial Discharge

q

GAINS OF 1 TO 10,000

q

LOW NONLINEARITY:

鹵

0.05% typ

q

LOW INPUT BIAS CURRENT:

鹵

10nA max

q

LOW INPUT OFFSET VOLTAGE

q

q

q

q

INPUTS PROTECTED TO

鹵

40V

BIPOLAR OPERATION V

O

=

鹵

10V

SYNCHRONIZATION CAPABILITY

28-PIN PLASTIC DIP: 0.6" Wide

DESCRIPTION

ISO255 is a precision three-port isolated instrumenta-

tion amplifier incorporating a novel duty cycle modu-

lation-demodulation technique and has excellent accu-

racy. Internal input protection can withstand up to

鹵40V

input differential without damage. The signal is

transmitted digitally across a differential capacitive

barrier. With digital modulation the barrier character-

istics do not affect signal integrity. This results in

excellent reliability and good high frequency transient

immunity across the barrier. The DC/DC converter,

amplifier and barrier capacitors are housed in a plastic

DIP.

A power supply range of 11V to 18V makes this

amplifier ideal for a wide range of applications.

APPLICATIONS

q

INDUSTRIAL PROCESS CONTROL

Transducer Isolator, Thermocouple

Isolator, RTD Isolator, Pressure Bridge

Isolator, Flow Meter Isolator

q

POWER MONITORING

q

MEDICAL INSTRUMENTATION

q

ANALYTICAL MEASUREMENTS

q

BIOMEDICAL MEASUREMENTS

q

DATA ACQUISITION

q

TEST EQUIPMENT

q

GROUND LOOP ELIMINATION

ISO255

4

1

2

3

+V

IN

+R

G

鈥揜

G

鈥揤

IN

INA

V

OUT

14

26

28

27

25

Com1

+V

S1

鈥揤

S1

GND1

Com2

+V

S2

鈥揤

S2

GND2

13

12

11

10

GND3 SYNC

17

16

+V

S3

15

International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111

Internet: http://www.burr-brown.com/ 鈥?FAXLine: (800) 548-6133 (US/Canada Only) 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132

漏

1996 Burr-Brown Corporation

PDS-1312B

Printed in U.S.A. April, 1996

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