1

®

3650/52

3650

3652

Optically-Coupled Linear

ISOLATION AMPLIFIERS

FEATURES

q BALANCED INPUT

q LARGE COMMON-MODE VOLTAGES:

140dB Rejection

q ULTRA LOW LEAKAGE:

0.35

1.8pF Leakage Capacitance

q EXCELLENT GAIN ACCURACY:

0.05% Linearity

0.05%/1000 Hrs Stability

q WIDE BANDWIDTH:

15kHz

1.2V/

APPLICATIONS

q INDUSTRIAL PROCESS CONTROL

q DATA ACQUISITION

q INTERFACE ELEMENT

q BIOMEDICAL MEASUREMENTS

q PATIENT MONITORING

q TEST EQUIPMENT

q CURRENT SHUNT MEASUREMENT

q GROUND-LOOP ELIMINATION

q SCR CONTROLS

DESCRIPTION

The 3650 and 3652 are optically coupled integrated

circuit isolation amplifiers. Prior to their introduction

commercially available isolation amplifiers had been

modular or rack mounted devices using transformer

coupled modulation demodulation techniques.

Compared to these earlier isolation amplifiers, the

3650 and 3652 have the advantage of smaller size,

lower cost, wider bandwidth and integrated circuit

reliability. Also, because they use a DC analog modu-

lation technique as opposed to a carrier-type tech-

nique, they avoid the problems of electro-

magnetic interference (both transmitted and received)

that most of the modular isolation amplifiers exhibit.

A

1

A

1

11

10

8

9

Light

Flux

Coupling

23

A

3

A

4

1.6M

Ω

1.6M

Ω

R

G1

R

G2

R

IN

3652 Only

Common to 3650 and 3652

3

1

6

4

®

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

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

PDS-342L

Printed in U.S.A. August, 1997

SBOS129