Datasheet AD8551, AD8552, AD8554 (Analog Devices)

Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers Data Sheet AD8551/ AD8552/ AD8554 FEATURES PIN CONFIGURATIONS Low offset voltage: 1 μV Input offset drift: 0.005 μV/°C NC 1 8 NC –IN A V+ AD8551 Rail-to-rail input and output swing +IN A OUT A V– 4 5 NC
001
5 V/2.7 V single-supply operation NC = NO CONNECT High gain, CMRR, PSRR: 130 dB
01101- Figure 1. 8-Lead MSOP (RM Suffix)
Ultralow input bias current: 20 pA Low supply current: 700 μA/op amp NC 1 8 NC Overload recovery time: 50 μs –IN A 2 7 V+ No external capacitors required AD8551 +IN A 3 6 OUT A V– 4 5 NC APPLICATIONS
002
NC = NO CONNECT Temperature sensors
01101- Figure 2. 8-Lead SOIC (R Suffix)
Pressure sensors Precision current sensing OUT A 1 8 V+ Strain gage amplifiers –IN A OUT B AD8552 +IN A –IN B
003
Medical instrumentation V– 4 5 +IN B
01101-
Thermocouple amplifiers
Figure 3. 8-Lead TSSOP (RU Suffix)
GENERAL DESCRIPTION OUT A 1 8 V+
This family of amplifiers has ultralow offset, drift, and bias
–IN A 2 7 OUT B
current. The AD8551, AD8552, and AD8554 are single, dual,
AD8552 +IN A 3 6 –IN B
and quad amplifiers featuring rail-to-rail input and output swings.
V– 4 5 +IN B
004 All are guaranteed to operate from 2.7 V to 5 V with a single supply. 01101- Figure 4. 8-Lead SOIC (R Suffix) The AD8551/AD8552/AD8554 provide the benefits previously found only in expensive auto-zeroing or chopper-stabilized
OUT A 1 14 OUT D –IN A –IN D
amplifiers. Using Analog Devices, Inc. topology, these new
+IN A +IN D V+ AD8554 V–
zero-drift amplifiers combine low cost with high accuracy. No
+IN B +IN C
005 external capacitors are required.
–IN B –IN C OUT B 7 8 OUT C
01101- With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the Figure 5. 14-Lead TSSOP (RU Suffix) AD8551/AD8552/AD8554 are perfectly suited for applications in which error sources cannot be tolerated. Temperature,
OUT A 1 14 OUT D
position and pressure sensors, medical equipment, and strain
–IN A 2 13 –IN D
gage amplifiers benefit greatly from nearly zero drift over their
+IN A 3 12 +IN D
operating temperature range. The rail-to-rail input and output
V+ 4 11 V– AD8554
swings provided by the AD8551/AD8552/AD8554 make both
+IN B 5 10 +IN C
high-side and low-side sensing easy.
–IN B 6 9 –IN C
006
OUT B 7 8 OUT C
The AD8551/AD8552/AD8554 are specified for the extended 01101- Figure 6. 14-Lead SOIC (R Suffix) industrial/automotive temperature range (−40°C to +125°C). The AD8551 single amplifier is available in 8-lead MSOP and 8-lead narrow SOIC packages. The AD8552 dual amplifier is available in 8-lead narrow SOIC and 8-lead TSSOP surface- mount packages. The AD8554 quad is available in 14-lead narrow SOIC and 14-lead TSSOP packages.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS FUNCTIONAL DESCRIPTION AMPLIFIER ARCHITECTURE BASIC AUTO-ZERO AMPLIFIER THEORY Auto-Zero Phase Amplification Phase HIGH GAIN, CMRR, PSRR MAXIMIZING PERFORMANCE THROUGHPROPER LAYOUT 1/f NOISE CHARACTERISTICS INTERMODULATION DISTORTION BROADBAND AND EXTERNAL RESISTOR NOISE CONSIDERATIONS OUTPUT OVERDRIVE RECOVERY INPUT OVERVOLTAGE PROTECTION OUTPUT PHASE REVERSAL CAPACITIVE LOAD DRIVE POWER-UP BEHAVIOR APPLICATIONS INFORMATION A 5 V PRECISION STRAIN GAGE CIRCUIT 3 V INSTRUMENTATION AMPLIFIER A HIGH ACCURACY THERMOCOUPLE AMPLIFIER PRECISION CURRENT METER PRECISION VOLTAGE COMPARATOR OUTLINE DIMENSIONS ORDERING GUIDE