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EUWiP / MECHATRONIKA

Wzmacniacze precyzyjne

Dokumentacja katalogowa - na przykładzie AD8571/2/4 (ADI)

□ ANALOG DEVICES

Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers

"auto-zero" AD8571/AD8572/AD8574

FEATURES

Low Offset Vol»age; 1 uV Input Offset Drift: 0.005 pV/°C Rail-to-Rail Input and Output Swing 5 V/2.7 V Single-Supply Operation High Gain, CMRR, PSRR: 130 dB Ultralow Input Bias Current: 20 pA Low Supply Current: 750 i«A/Op Amp Oyerload Recovery Time: 50 ps No External Capacitors Required

APPLICATIONS Temperaturę Sensors Pressure Sensors Precision Current Sensing Strain Gage Amplifiers Medical Instrumentation Thermocouple Amplifiers

PIN CONFIGURATIONS

S-Lead MSOP (RM Sufti.\)

S-Leud SOIC (R Su fiix)

--INA

v-

A08571

NC - NO CONNfcCI

NC = NO CONNECT

GT1NHRAT. DF.SCRIPTION

This new family of amplifiers has ultralow offset, drift and bias current. The AD8571, AD8572 and AD8574 are single, dual and quad amplifiers fcaturing rail-to-rail input and output swings. Ali aro guarantccd to operate trom 2.7 V to 5 V single supply.

The AD857x family provides tlie benefits previou$ly found only iu expensive auLuzeroing or chopper-stabilized amplifiers. Using Analog l)evices' new topology these new 7.ero-drift amplifiers combine low cost with high accuracy. (No external capacitors are reąuired.) In addition, using a patented spread-spectrum autozero technique. rhe AD857x family virtuallv eliminates tlie intennodulatiou effects froin interaction of the chopping fimetion with tlie signal freąuency in ac applicalions.

With an offset vohage of only 1 uV and drift of 0.005 ij.V/⁰C, the AD8571 is perfectly suited for applications where error sources cannot be tolerated. Position, and pressure sensors, medical equipmcnt, and strain gage amplifiers benefir grcatly trom nearly zero drift over their operating temperaturę rangę. Many morę systems require tlie rail-to-rail mput and output swmgs provided by the Al)857x family.

The AD857x family is specified for the extended induslrial'aulomolive ( 40°C to + I25°C) temperaturę rangę. The AD857I single is available in 8-lead MSOH and narrow 8-lead SOIC packages. The AD8572 dual amplificr is available in 8-lead narrow SO and 8-lcad TSSOP surface mount packages. The AD8574 quad is available in narrow H-lead SOIC and 11-lead TSSOP packages.

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