1 nV/√Hz Low Noise Instrumentation Amplifier

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Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $4.12
  • Low noise
    1 nV/√Hz input noise
    45 nV/√Hz output noise
  • High accuracy dc performance (AD8429BRZ)
    90 dB CMRR minimum (G = 1)
    50 μV maximum input offset voltage
    0.02% maximum gain accuracy (G = 1)
  • Excellent ac specifications
    80 dB CMRR to 5 kHz (G = 1)
    15 MHz bandwidth (G = 1)
    1.2 MHz bandwidth (G = 100)
    22 V/μs slew rate
    THD: −130 dBc (1 kHz, G = 1)
  • Versatile
    ±4 V to ±18 V dual supply
    Gain set with a single resistor
    (G = 1 to 10,000)
  • Temperature range for specified performance
    −40°C to +125°C
Additional Details
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The AD8429 is an ultralow noise, instrumentation amplifier designed for measuring extremely small signals over a wide temperature range (−40°C to +125°C).

The AD8429 excels at measuring tiny signals. It delivers ultralow input noise performance of 1 nV/√Hz. The high CMRR of the AD8429 prevents unwanted signals from corrupting the acqui-sition. The CMRR increases as the gain increases, offering high rejection when it is most needed. The high performance pin configuration of the AD8429 allows it to reliably maintain high CMRR at frequencies well beyond those of typical instrumentation amplifiers.

The AD8429 reliably amplifies fast changing signals. Its current feedback architecture provides high bandwidth at high gain, for example, 1.2 MHz at G = 100. The design includes circuitry to im-prove settling time after large input voltage transients. The AD8429 was designed for excellent distortion performance, allowing use in demanding applications such as vibration analysis.

Gain is set from 1 to 10,000 with a single resistor. A reference pin allows the user to offset the output voltage. This feature can be useful to shift the output level when interfacing to a single supply signal chain. The AD8429 performance is specified over the extended industrial temperature range of −40°C to +125°C. It is available in an 8-lead plastic SOIC package.


  • Medical instrumentation
  • Precision data acquisition
  • Microphone preamplification
  • Vibration analysis
Part Models 4
1ku List Price Starting From $4.12

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image


AD62x, AD822x, AD842x Series InAmp Evaluation Board



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 4

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.

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