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AD8628:  Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier

This amplifier has ultralow offset, drift, and bias current. The AD8628/AD8629/AD8630 are wide bandwidth auto-zero amplifiers featuring rail-to-rail input and output swing and low noise. Operation is fully specified from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply).

The AD8628/AD8629/AD8630 provide benefits previously found only in expensive auto-zeroing or chopper-stabilized ...More

AD8628:  Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier

Product Description

This amplifier has ultralow offset, drift, and bias current. The AD8628/AD8629/AD8630 are wide bandwidth auto-zero amplifiers featuring rail-to-rail input and output swing and low noise. Operation is fully specified from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply).

The AD8628/AD8629/AD8630 provide benefits previously found only in expensive auto-zeroing or chopper-stabilized 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/ AD8629/AD8630 greatly reduce the digital switching noise found in most chopper-stabilized amplifiers.

With an offset voltage of only 1 μV, drift of less than 0.005 μV/°C, and noise of only 0.5 μV p-p (0 Hz to 10 Hz), the AD8628/ AD8629/AD8630 are suited for applications where error sources cannot be tolerated. Position and pressure sensors, 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.

The AD8628/AD8629/AD8630 are specified for the extended industrial temperature range (−40°C to +125°C). The AD8628 is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead narrow SOIC plastic packages. The AD8629 is available in the standard 8-lead narrow SOIC and MSOP plastic packages. The AD8630 quad amplifier is available in 14-lead narrow SOIC and 14-lead TSSOP plastic packages.

Applications

  • Automotive sensors
  • Pressure and position sensors
  • Strain gage amplifiers
  • Medical instrumentation
  • Thermocouple amplifiers
  • Precision current sensing
  • Photodiode amplifiers

    • Data Sheet, Rev. G, 6/08

    RESOURCES & TOOLS

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    • Lowest Auto-Zero Amplifier Noise
    • Low Offset Voltage: 1 µV
    • Input Offset Drift: 0.002 µV/°C
    • Rail-to-Rail Input and Output Swing
    • 5 V Single-Supply Operation
    • High Gain, CMRR, and PSRR: 120 dB
    • Very Low Input Bias Current: 100 pA maximum
    • See Data Sheet for Additional Information
    • -3dB Bandwidth: 2.5MHz
    • Slew Rate: 1V/µs
    • Vos: 1µV
    • Ib: 30pA
    • Input Noise (nV/rtHz): 22nV/rtHz
    • Vcc-Vee Supply (V): 2.7 to 6
    • Iq per Amplifier: 1.1mA
    • # OpAmps per Pkg: 1
    • Operating Temp Range: -40 to +125
    • Packages: SOIC,SOT

    Pin Configuration Diagram for AD8628

    Circuits from the Lab

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    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
    AD8628 2.5MHz 1V/µs 1µV 30pA 22nV/rtHz 1 -40 to +125
    AD8629 2.5MHz 1V/µs 1µV 30pA 22nV/rtHz 2 -40 to +125
    AD8605 10MHz 5V/µs 20µV 200fA 6.5nV/rtHz 1 -40 to +125
    AD8661 4MHz 3.5V/µs 30µV 300fA 12nV/rtHz 1 -40 to +125
    ADA4000-1 5MHz 20V/µs 200µV 5pA 16nV/rtHz 1 -40 to +125
    AD8691 10MHz 5V/µs 400µV 200fA 6.5nV/rtHz 1 -40 to +125
    AD8601 8.4MHz 6V/µs 500µV 200fA 18nV/rtHz 1 -40 to +125
    AD8665 4MHz 3.5V/µs 600µV 200fA 10nV/rtHz 1 -40 to +125
    AD8515 5MHz 2.7V/µs 1mV 2pA 22nV/rtHz 1 -40 to +125
    AD8615 23MHz 12V/µs 80µV 200fA 7nV/rtHz 1 -40 to +125
    AD8610 25MHz 60V/µs 75µV 2pA 6nV/rtHz 1 -40 to +125
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    Pricing, Packaging & Availability

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    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.