1. Products
  2. A/D Converters (ADC)
  3. High Speed A/D Converters >10 MSPS
  4. Standard High Speed A/D Converters
  5. AD6645


Features and Benefits

  • SNR = 75 dB, fIN 15 MHz, up to 105 MSPS
  • SNR = 72 dB, fIN 200 MHz, up to 105 MSPS
  • SFDR = 89 dBc, fIN 70 MHz, up to 105 MSPS
  • 100 dBFS multitone SFDR
  • IF sampling to 200 MHz
  • Sampling jitter: 0.1 ps
  • 1.5 W power dissipation
  • Differential analog inputs
  • Pin compatible to AD6644
  • Twos complement digital output format
  • 3.3 V CMOS compatible
  • Data-ready for output latching

Product Details

The AD6645 is a high speed, high performance, monolithic 14-bit analog-to-digital converter (ADC). All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family, preceded by the AD9042 (12-bit, 41 MSPS), the AD6640 (12-bit, 65 MSPS, IF sampling), and the AD6644 (14-bit, 40 MSPS/65 MSPS).

Designed for multichannel, multimode receivers, the AD6645 is part of the Analog Devices, Inc., SoftCell® transceiver chipset. The AD6645 maintains 100 dB multitone, spurious-free dynamic range (SFDR) through the second Nyquist band. This breakthrough performance eases the burden placed on multimode digital receivers (software radios) that are typically limited by the ADC. Noise performance is exceptional; typical signal-to-noise ratio (SNR) is 74.5 dB through the first Nyquist band.

The AD6645 is built on the Analog Devices extra fast complementary bipolar (XFCB) process and uses an innovative, multipass circuit architecture. Units are available in a 52-lead exposed pad (TQFP_EP) package specified from −40°C to +85°C at 80 MSPS and −10°C to +85°C at 105 MSPS.

Product Highlights

  1. IF Sampling. The AD6645 maintains outstanding ac performance up to input frequencies of 200 MHz, suitable for multicarrier 3G wideband cellular IF sampling receivers.
  2. Pin Compatibility. The ADC has the same footprint and pin layout as the AD6644 14-bit, 40 MSPS/65 MSPS ADC.
  3. SFDR Performance and Oversampling. Multitone SFDR performance of 100 dBFS can reduce the requirements of high end RF components.


  • Multichannel, multimode receivers
  • Base station infrastructures
  • Single channel digital receivers
  • Antenna array processing
  • Communications instrumentation
  • Radars, infrared imaging
  • Instrumentation

Product Lifecycle icon-recommended 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.

Evaluation Kits (1)

Documentation & Resources

  • View All (33)
  • Data Sheets (1)
  • Application Notes (15)
  • Customer Case Studies (1)
  • Cross Reference Guides (3)
  • Circuit Note (1)
  • Technical Articles (12)
  • Application Notes
    Technical Articles

    Tools & Simulations

    Virtual Eval - BETA

    Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.


    IBIS Models

    AD6645 IBIS Models

    Design Tools

    Visual Analog

    For designers who are selecting or evaluating high speed ADCs, VisualAnalog™ is a software package that combines a powerful set of simulation and data analysis tools with a user-friendly graphical interface.

    Product Recommendations

    AD6645 Companion Parts

    Recommended ADC Drivers

    Recommended Clock Drivers

    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
    AD6645ASVZ-105 Material Declaration Reliability Data 52-Lead TQFP (10mm x 10mm w/ EP)
    AD6645ASVZ-80 Material Declaration Reliability Data 52-Lead TQFP (10mm x 10mm w/ EP)
    Wafer Fabrication Data

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    Sample & Buy

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    Evaluation Boards

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    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.