Datasheet > XTR112/XTR114

XTR112/XTR114

更新时间： 2022-01-18 16:49:00

品牌	Logo	应用领域
BB		传感器
页数	文件大小	规格书
16页	257K
描述
XTR112. XTR114 - 4-20mA CURRENT TRANSMITTERS with Sensor Excitation and Linearization

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XTR112/XTR114 数据手册

XTR114

XTR112

XTR114

XTR112

4-20mA CURRENT TRANSMITTERS

with Sensor Excitation and Linearization

FEATURES

APPLICATIONS

● LOW UNADJUSTED ERROR

● INDUSTRIAL PROCESS CONTROL

● PRECISION CURRENT SOURCES

XTR112: Two 250µA

● FACTORY AUTOMATION

● SCADA REMOTE DATA ACQUISITION

XTR114: Two 100µA

● REMOTE TEMPERATURE AND PRESSURE

● RTD OR BRIDGE EXCITATION

● LINEARIZATION

TRANSDUCERS

● TWO OR THREE-WIRE RTD OPERATION

● LOW OFFSET DRIFT: 0.4µV/°C

● LOW OUTPUT CURRENT NOISE: 30nAp-p

● HIGH PSR: 110dB min

Pt1000 NONLINEARITY CORRECTION

USING XTR112 and XTR114

● HIGH CMR: 86dB min

● WIDE SUPPLY RANGE: 7.5V TO 36V

● SO-14 SOIC PACKAGE

Uncorrected

RTD Nonlinearity

Corrected

Nonlinearity

DESCRIPTION

The XTR112 and XTR114 are monolithic 4-20mA,

two-wire current transmitters. They provide complete

current excitation for high impedance platinum RTD

temperature sensors and bridges, instrumentation am-

plifier, and current output circuitry on a single inte-

grated circuit. The XTR112 has two 250µA current

sources while the XTR114 has two 100µA sources for

RTD excitation.

–1

–200°C

+850°C

Process Temperature (°C)

I_R

V_LIN

V_REG

Versatile linearization circuitry provides a 2nd-order

correction to the RTD, typically achieving a 40:1

improvement in linearity.

7.5V to 36V

V_PS

Instrumentation amplifier gain can be configured for a

wide range of temperature or pressure measurements.

Total unadjusted error of the complete current trans-

mitter is low enough to permit use without adjustment

in many applications. This includes zero output cur-

rent drift, span drift and nonlinearity. The XTR112

and XTR114 operate on loop power supply voltages

down to 7.5V.

4-20 mA

XTR112

XTR114

V_O

R_L

R_G

RTD

–

XTR112: I_R= 250µA

XTR114: I_R= 100µA

Both are available in an SO-14 surface-mount pack-

age and are specified for the –40°C to +85°C indus-

trial temperature range.

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/

•

Cable: BBRCORP Telex: 066-6491

•

FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132

•

PDS-11473A

Printed in U.S.A. December, 1998

XTR112, XTR114

12 3 4 5 6 7...16

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