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ADT70 Datasheet Prtd Conditioning Circuit And Temperature Controller

Manufacturer: Analog Devices

Overview: a.

General Description

PRTD Conditioning Circuit and Temperature Controller ADT70* FUNCTIONAL BLOCK DIAGRAM NULLA NULLB BIAS 2.5VREFOUT ADT70 +VS OUTOA IOUTA IOUTB MATCHED CURRENT SOURCES 2.5V REF +INOA ؊INOA +INIA ؊INIA INST AMP SHUTDOWN SHUTDOWN RGA RGB GND SENSE OUTIA AGND ؊VS DGND The ADT70 provides excitation and signal conditioning for resistance-temperature devices (RTDs).

It is ideally suited for 1 kΩ Platinum RTDs (PRTDs), allowing a very wide range of temperature measurement.

It can also easily interface to 100 Ω PRTDs.

Key Features

  • PRTD Temperature Measurement Range Typical IC Measurement Error ؎ 1؇C Includes Two Matched Current Sources Rail-to-Rail Output Instrumentation Amp Uncommitted, Rail-to-Rail Output Op Amp On-Board ؉ 2.5 V Reference Temperature Coefficient ؎ 25 ppm/؇C ؉ 5 V or ؎ 5 V Operation Supply Current 4 mA Max 10 ␮ A Max in Shutdown.

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ADT70 Distributor