Datasheet AD8628, AD8629, AD8630 (Analog Devices)

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Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier Data Sheet AD8628/ AD8629/ AD8630 FEATURES PIN CONFIGURATIONS Lowest auto-zero amplifier noise OUT 5 V+ Low offset voltage: 1 µV 1 AD8628 Input offset drift: 0.002 µV/°C V– 2 TOP VIEW (Not to Scale) Rail-to-rail input and output swing
001
+IN 3 4 –IN 5 V single-supply operation
02735-
High gain, CMRR, and PSRR: 130 dB
Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5)
Very low input bias current: 100 pA maximum Low supply current: 1.0 mA Overload recovery time: 50 µs NC 1 8 NC No external components required –IN 2 AD8628 7 V+ Qualified for automotive applications +IN 3 6 TOP VIEW OUT V– (Not to Scale) 4 5 NC
002
NC = NO CONNECT
02735-
APPLICATIONS
Figure 2. 8-Lead SOIC_N (R-8)
Automotive sensors Pressure and position sensors Strain gage amplifiers OUT A 1 8 V+ Medical instrumentation –IN A 2 AD8629 7 OUT B Thermocouple amplifiers TOP VIEW +IN A 3 6 –IN B (Not to Scale)
063
Precision current sensing V– 4 5 +IN B
02735-
Photodiode amplifiers
Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
GENERAL DESCRIPTION
This amplifier has ultralow offset, drift, and bias current.
OUT A 1 14 OUT D
The AD8628/AD8629/AD8630 are wide bandwidth auto-zero
–IN A 2 13 –IN D +IN A 3 12 +IN D AD8630
amplifiers featuring rail-to-rail input and output swing and low
V+ 4 TOP VIEW 11 V–
noise. Operation is ful y specified from 2.7 V to 5 V single supply
(Not to Scale) +IN B 5 10 +IN C
(±1.35 V to ±2.5 V dual supply).
–IN B 6 9 –IN C
066
OUT B 7 8 OUT C
The AD8628/AD8629/AD8630 provide benefits previously 02735- found only in expensive auto-zeroing or chopper-stabilized Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14) amplifiers. Using Analog Devices, Inc., topology, these zero- drift amplifiers combine low cost with high accuracy and low noise. No external capacitor is required. In addition, the AD8628/ The AD8628/AD8629/AD8630 are specified for the extended AD8629/AD8630 greatly reduce the digital switching noise industrial temperature range (−40°C to +125°C). The AD8628 found in most chopper-stabilized amplifiers. is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead narrow SOIC plastic packages. The AD8629 is available in the With an offset voltage of only 1 µV, drift of less than 0.005 μV/°C, standard 8-lead narrow SOIC and MSOP plastic packages. The and noise of only 0.5 µV p-p (0 Hz to 10 Hz), the AD8628/ AD8630 quad amplifier is available in 14-lead narrow SOIC and AD8629/AD8630 are suited for applications where error 14-lead TSSOP plastic packages. See the Ordering Guide for sources cannot be tolerated. Position and pressure sensors, automotive grades. medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8628/AD8629/AD8630 to reduce input biasing complexity and maximize SNR.
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Document Outline Features Applications General Description Pin Configurations Table of Contents Revision History Specifications Electrical Characteristics—VS = 5.0 V Electrical Characteristics—VS = 2.7 V Absolute Maximum Ratings Thermal Characteristics ESD Caution Typical Performance Characteristics Functional Description 1/f Noise Peak-to-Peak Noise Noise Behavior with First-Order, Low-Pass Filter Total Integrated Input-Referred Noise for First-Order Filter Input Overvoltage Protection Output Phase Reversal Overload Recovery Time Infrared Sensors Precision Current Shunt Sensor Output Amplifier for High Precision DACs Outline Dimensions Ordering Guide Automotive Products