12-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V Analog-to-Digital Converter

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Product Details

The AD9634 is a 12-bit, analog-to-digital converter (ADC) with sampling speeds of up to 250 MSPS. The AD9634 is designed to support communications applications where low cost, small size, wide bandwidth, and versatility are desired.

The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. The ADC features wide bandwidth inputs that can support a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. A duty cycle stabilizer (DCS) is provided to compensate for variations in the ADC clock duty cycle, allowing the converter to maintain excellent performance.

The ADC output data are routed directly to the external 12-bit LVDS output port.

Flexible power-down options allow significant power savings, when desired.

Programming for setup and control is accomplished using a 3-wire, SPI-compatible serial interface.

The AD9634 is available in a 32-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C. This product is protected by a U.S. patent.


  • Communications
  • Diversity radio systems
  • Multimode digital receivers (3G)
    CDMA2000, GSM, EDGE, LTE
  • I/Q demodulation systems
  • Smart antenna systems
  • General-purpose software radios
  • Ultrasound equipment
  • Broadband data applications


  1. Integrated 12-bit, 170 MSPS/210 MSPS/250 MSPS ADC.
  2. Fast overrange and threshold detect.
  3. Proprietary differential input maintains excellent SNR performance for input frequencies up to 350 MHz.
  4. 3-pin, 1.8V SPI port for register programming and readback.
  5. Pin compatibility with the AD9642, allowing a simple migration up to 14 bits, and with the AD6672.

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits


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Tools & Simulations

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Virtual Eval - BETA

Virtual Eval is a web application to assist designers in product evaluation of ADCs and DACs. 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, frequency response plots, and more.

Virtual Eval Beta

IBIS Models

Design Tools

Product Recommendations

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AD9634 Companion parts

Recommended Clock Drivers

Recommended Driver Amplifiers

  • For differential RF/IF , we recommend the ADL5562 .
  • For DC-coupled inputs , we recommend the ADA4927-1 or the ADA4938-1 .
  • For a fully differential input and output DVGA in digital communications systems , we recommend the ADL5202 or the AD8376 .

Design Resources

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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.

AD9634 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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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.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.