© 1988 Burr-Brown Corporation

PDS-851D

Printed in U.S.A. October, 1993

FEATURES

q COMPLETELY FLOATING:

No Power Supply or Ground Connections

q HIGH ACCURACY: 100

q LOW TEMPERATURE COEFFICIENT:

q WIDE VOLTAGE COMPLIANCE:

2.5V to 40V

q ALSO INCLUDES CURRENT MIRROR

APPLICATIONS

q SENSOR EXCITATION

q BIASING CIRCUITRY

q OFFSETTING CURRENT LOOPS

q LOW VOLTAGE REFERENCES

q CHARGE-PUMP CIRCUITRY

q HYBRID MICROCIRCUITS

REF200

DUAL CURRENT SOURCE/CURRENT SINK

DESCRIPTION

The REF200 combines three circuit building-blocks

on a single monolithic chip—two 100

µA current

sources and a current mirror. The sections are

dielectrically isolated, making them completely

independent. Also, since the current sources are two-

terminal devices, they can be used equally well as

current sinks. The performance of each section is

individually measured and laser-trimmed to achieve

high accuracy at low cost.

The sections can be pin-strapped for currents of 50

µA,

100

µA, 200µA, 300µA or 400µA. External circuitry

can be used to obtain virtually any current. These and

many other circuit techniques are shown in the

Applications section of this Data Sheet.

The REF200 is available in plastic 8-pin mini-DIP

and SOIC packages.

I

High

I

High

Substrate

Mirror

In

I

Low

I

Low

Mirror

Out

Mirror

Common

1

2

1

2

8765

1234

100µA

100µA

®

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

REF200

REF200

SBVS020