AD8655

Low Noise, Precision CMOS Amplifier
Manufactured by:

Product Details

The AD8655/AD8656 are the industry’s lowest noise, precision CMOS amplifiers. They leverage the Analog Devices DigiTrim® technology to achieve high dc accuracy.

The AD8655/AD8656 provide low noise (2.7 nV/√Hz at 10 kHz), low THD + N (0.0007%), and high precision performance (250 μV max over VCM) to low voltage applications. The ability to swing rail-to-rail at the input and output enables designers to buffer analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.

The high precision performance of the AD8655/AD8656 improves the resolution and dynamic range in low voltage applications. Audio applications, such as microphone pre-amps and audio mixing consoles, benefit from the low noise, low distortion, and high output current capability of the AD8655/AD8656 to reduce system level noise performance and maintain audio fidelity. The high precision and rail-to-rail input and output of the AD8655/ AD8656 benefit data acquisition, process controls, and PLL filter applications.

The AD8655/AD8656 are fully specified over the −40°C to +125°C temperature range. The AD8655/AD8656 are available in Pb-free, 8-lead MSOP and SOIC packages. The AD8655/ AD8656 are both available for automotive applications.



Applications

  • ADC and DAC buffers
  • Audio
  • Industrial controls
  • Precision Filters
  • Digital Scales
  • Automotive collision avoidance
  • PLL filters
  • Product Lifecycle

    checked Production

    At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

    Tools & Simulations

    X +

    Reference Materials

    X +

    Design Resources

    X +

    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.

    AD8655 Material Declaration
    PCN-PDN Information Quality And Reliability Symbols and Footprints

    Reviews

    X+

    Overview

    2 Reviews
    2 out of 2 (100%) customers recommend this product.
    Quality
    1
    2
    3
    4
    5
    Reliability
    1
    2
    3
    4
    5
    Features
    1
    2
    3
    4
    5

    Most Helpful Review

    by rco3
    I used the AD8655 to drive an ADC input, post-mux. The part performs exactly as I want it to here, with settling times and DC accuracy being the critical parameters.

    Most Recent Review

    by pk72
    I choose AD8655 because of low voltage noise (very low for a cmos opamp. But be aware that the corner frequency where noise starts to rise is higher for this opamp compared to other technologies (bipolar, fet)), very good bias current. Current noise should also be very good but is not stated in the datasheet which is not good. I read that current noise is too low to be measured for cmos opamps. Seems to me not to make much sense reviewing an opamp, I mean everybody can read the datasheet. But as analog devices was so kind to send me samples I thought I should take the time to write this.

    All Reviews

    by pk72, 7 Jan 15
    very good voltage noise for a cmos opamp
    I choose AD8655 because of low voltage noise (very low for a cmos opamp. But be aware that the corner frequency where noise starts to rise is higher for this opamp compared to other technologies (bipolar, fet)), very good bias current. Current noise should also be very good but is not stated in the datasheet which is not good. I read that current noise is too low to be measured for cmos opamps. Seems to me not to make much sense reviewing an opamp, I mean everybody can read the datasheet. But as analog devices was so kind to send me samples I thought I should take the time to write this.
    Was this Helpful?Helpful(0)
    by rco3, 12 Aug 13
    This was the part I needed
    I used the AD8655 to drive an ADC input, post-mux. The part performs exactly as I want it to here, with settling times and DC accuracy being the critical parameters.
    Was this Helpful?Helpful(0)

    Sample & Buy

    X+
    Back
    Check Inventory

    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.


    Price Table Help