AD8428
Info : RECOMMENDED FOR NEW DESIGNS
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AD8428

Low Noise, Low Gain Drift, G = 2000 Instrumentation Amplifier

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $7.77
Features
  • Fixed gain of 2000
  • Access to internal nodes provides flexibility
  • Low noise: 1.5 nV/√Hz input voltage noise
  • High accuracy dc performance
    Gain drift: 10 ppm/°C
    Offset drift: 1 μV/°C
    Gain accuracy: 0.2%
    CMRR: 130 dB min
  • Excellent ac specifications
    Bandwidth: 3.5 MHz
    Slew rate: 40 V/μs
  • Power supply range:
    ±4 V to ±18 V
  • 8-pin SOIC package
  • ESD protection >5000 V (HBM)
  • Temperature range for specified performance:
    −40°C to +85°C
  • Operational up to 125°C
  • Download AD8428-KGD Data Sheet
  • Available As Known Good Die and fully guaranteed to data sheet specifications
Additional Details
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The AD8428 is an ultra-low noise instrumentation amplifier designed for accurately measuring tiny, high-speed signals. It delivers industry-leading gain-accuracy, noise and bandwidth.

All gain setting resistors for the AD8428 are internal to the part and precisely matched. Care is taken in both interconnects and symmetry. This results in excellent gain drift and quick settling to the final gain value after the part is powered on.

The high CMRR of the AD8428 prevents unwanted signals from corrupting the acquisition. The part’s pin-out is designed to avoid parasitic capacitance mismatches that can degrade CMRR at high frequencies.

The AD8428 is one of the fastest instrumentation amplifiers available. The circuit architecture is designed for high bandwidth at high gain: it uses current feedback topology for the initial pre-amp gain stage of 200, followed by a difference amplifier stage of 10. This results in a 3.5 MHz bandwidth at a gain of 2000, for an equivalent gain-bandwidth product of 7 GHz.

The AD8428 pinout allows access to internal nodes between the first and second stage. This feature can be useful to modify DC and AC parameters between the two amplification stages.

The AD8428 performance is specified over the industrial temperature range of −40°C to +85°C. It is available in an 8-lead plastic SOIC package.

Applications

  • Sensor interface
  • Medical instrumentation
  • Patient monitoring
Part Models 4
1ku List Price Starting From $7.77

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD8428ARZ
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AD8428ARZ-RL
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AD8428BRZ
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AD8428BRZ-RL
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

EVAL-INAMP

AD62x, AD822x, AD842x Series InAmp Evaluation Board

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EVAL-INAMP

AD62x, AD822x, AD842x Series InAmp Evaluation Board

AD62x, AD822x, AD842x Series InAmp Evaluation Board

Product Detail

Analog Devices provides a line of evaluation boards designed to help users evaluate our instrumentation amplifiers in 8 pin packages. Access the user guide UG-261.

This user guide describes three generic evaluation boards that can be used to evaluate many of Analog Devices instrumentation amplifiers. For information on the performance of a specific instrumentation amplifier, see the data sheet for that instrumentation amplifier.

  • 3 generic, easy-to-use evaluation boards
    • Shipped with an assortment of Analog Devices in-amps
    • Solder in the in-amp to be tested
    • Test pins already populated
    • Decoupling capacitors already populated
  • EVAL-INAMP-62RZ board: Compatible with AD620, AD621, AD622, AD623, AD627, AD8223, AD8225,  LT1167, LT1168 and LT6370 in SOIC or PDIP
  • EVAL-INAMP-82RZ board: Compatible with AD8221, AD8226, AD8227, AD8228, AD8229, AD8421, AD8428, and AD8429 in SOIC package
  • EVAL-INAMP-82RMZ board: Compatible with AD8220, AD8221, AD8226, AD8227, AD8228, AD8236, and AD8421 in MSOP package
Tools & Simulations

Tools & Simulations 3

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