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  3. Operational Amplifiers (Op Amps)
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  5. AD8628

Data Sheet Rev. M
PDF
JP Rev. G
SPICE Model
1 View All
Circuit Note Rev. 0
JP 3 View All

Alternative Parts

ADA4528-1
ADA4528-1

Lower voltage noise and offset, higher bandwidth

LTC2057 <br>LTC2057HV
LTC2057
LTC2057HV

Higher supply 60V, better precision, lower voltage noise, shutdown option available

ADA4522-1
ADA4522-1

Higher supply 55V, better precision, lower voltage noise

ADA4638-1
ADA4638-1

Higher supply 30V

Overview

Features and Benefits

  • 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: 130 dB
  • Very low input bias current: 100 pA maximum
  • Low supply current: 1.0 mA
  • Overload recovery time: 50 μs
  • No external components required
  • Qualified for automotive applications

Product Details

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 (0.1 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. See the Ordering Guide section of the data sheet for automotive grades.

APPLICATIONS

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

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Evaluation Kits (1)

Documentation & Resources

  • View All (26)
  • Data Sheet (1)
  • Application Note (7)
  • Technical Book (1)
  • Tutorial (6)
  • Circuit Note (3)
  • Technical Article (5)
  • StudentZone Article (1)
  • Webcast (2)
    • Document Type
    Application Note

    Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    LTspice

    Models for the following parts are available in LTspice:

    AD8628

    SPICE Model

    Design Tool

    Analog Filter Wizard

    Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

    Analog Photodiode Wizard

    Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

    Reference Designs (5)

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    AD8628ARTZ-R2 Material Declaration Reliability Data 5-Lead SOT-23
    AD8628ARTZ-REEL7 Material Declaration Reliability Data 5-Lead SOT-23
    AD8628ARZ Material Declaration Reliability Data 8-Lead SOIC
    AD8628ARZ-REEL Material Declaration Reliability Data 8-Lead SOIC
    AD8628ARZ-REEL7 Material Declaration Reliability Data 8-Lead SOIC
    AD8628AUJZ-REEL Material Declaration Reliability Data 5-Lead TSOT
    AD8628AUJZ-REEL7 Material Declaration Reliability Data 5-Lead TSOT
    AD8628WARTZ-R7 Material Declaration Reliability Data 5-Lead SOT-23
    AD8628WARTZ-RL Material Declaration Reliability Data 5-Lead SOT-23
    AD8628WARZ-R7 Material Declaration Reliability Data 8-Lead SOIC
    AD8628WAUJZ-R7 Material Declaration Reliability Data 5-Lead TSOT
    AD8628WAUJZ-RL Material Declaration Reliability Data 5-Lead TSOT
    Wafer Fabrication Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • AD8628ARTZ-R2 Production
    • AD8628ARTZ-REEL7 Production
    • AD8628ARZ Production
    • AD8628ARZ-REEL Production
    • AD8628ARZ-REEL7 Production
    • AD8628AUJZ-REEL Production
    • AD8628AUJZ-REEL7 Production
    • AD8628WARTZ-R7 Production
    • AD8628WARTZ-RL Production
    • AD8628WARZ-R7 Production
    • AD8628WAUJZ-R7 Production
    • AD8628WAUJZ-RL Production

    Support & Discussions

    AD8628 Discussions

    RE: Reference buffer choice for AD7984
    RE: AD8628 vs ADA4528-1 Output Current Capability
    All AD8628 Discussions
    AD8628 Contact ADI Technical Support »
    AD8628 Ask your question »
    AD8628 Contact ADI Technical Support » AD8628 Ask your question »

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