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AD7674:  18-Bit, 2.5 LSB INL, 800 kSPS SAR ADC

Product Details


The AD7674 is an 18-bit, 800 kSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates on a single 5 V power supply. The part contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports.

The part is available in 48-lead LQFP or 48-lead LFCSP packages with operation specified from –40°C to +85°C.


Applications
  • CT scanners
  • High dynamic data acquisition
  • Geophone and hydrophone sensors
  • Σ-Δ replacement (low power, multichannel)
  • Instrumentation
  • Spectrum analysis
  • Medical instruments
  • FEATURES and BENEFITS

    • 18 Bits Resolution with No Missing Codes
    • No Pipeline Delay ( SAR architecture )
    • Differential input range: ±VREF (VREF up to 5 V)
    • Throughput:
      800 kSPS (Warp Mode)
      666 kSPS (Normal Mode)
      500 kSPS (Impulse Mode)
    • INL: ±2.5 LSB Max (±9.5 ppm of Full-Scale)
    • Dynamic range : 103 dB typ (VREF = 5 V)
    • S/(N+D): 100 dB typ @ 2 kHz (VREF = 5 V)
    • Parallel (18-,16-, or 8-bit bus) and serial 5 V/3 V interface
    • SPI®/QSPI™/MICROWIRE™/DSP compatible
    • On-board reference buffer
    • Single 5 V supply operation
    • See data sheet for additional features

    Functional Block Diagram for AD7674

    Documentation

    Title Content Type File Type
    AD7674: 18-Bit, 2.5 LSB INL, 800 kSPS SAR ADC Data Sheet (Rev A, 06/2009) (pdf, 2088 kB) Data Sheets PDF
    AN-931: Understanding PulSAR ADC Support Circuitry  (pdf, 299 kB)
    This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
    Application Notes PDF
    AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes PDF
    MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
    High Speed Op Amp Drives a 16-Bit, 1-MSPS Differential-Input A/D Converter
    (Analog Dialogue, Vol. 36, No. 6, November/December 2002)
    Analog Dialogue HTML
    Ask the Applications Engineer-27: What problems am I most likely to run into when instrumenting an industrial system?
    (Analog Dialogue, Vol. 33, No. 2, February, 1999)
    Analog Dialogue HTML
    When high performance and low power make the design, ADI converters make the difference. Overview HTML
    8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
    8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
    Overview PDF
    High Speed, High Accuracy 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs  (pdf, 3826 kB)
    A PulSAR Family Brochure (6/2006)
    Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    AD7674 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD7674ACPZ Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Tray, 260 $31.29 $28.29 Y  Material Info PCN Purchase Sample
    AD7674ACPZRL Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Reel, 2500 - $28.29 Y  Material Info PCN Purchase
    AD7674ASTZ Status: Production 48 ld LQFP 48 Ind Tray, 250 $31.29 $28.29 Y  Material Info PCN Purchase
    AD7674ASTZRL Status: Production 48 ld LQFP 48 Ind Reel, 2000 - $28.29 Y  Material Info PCN Purchase

    Price Table Help

    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.

    AD7674 Evaluation Kit
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVAL-AD7674EDZ Status: Production Evaluation Board $99.00 Yes -
    EVAL-CED1Z Status: Production Evaluation Controller Board $249.00 Yes -

    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.

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