AD1974

4 ADC with PLL, 192 kHz, 24-Bit ADC
Manufactured by:

Product Details

The AD1974 is a high performance, single-chip ADC that provides four analog-to-digital converters (ADCs) with differential inputs using the Analog Devices, Inc. patented multibit sigma-delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to enable mutes and adjust many other parameters. The AD1974 operates from 3.3 V digital and analog supplies. The AD1974 is available in a single-ended output 48-lead LQFP.

The AD1974 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board phase-locked loop (PLL) to derive the master clock from the LR clock or from an external crystal, the AD1974 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The ADCs are designed using the latest continuous time architectures from Analog Devices to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions.

Applications

  • Automotive audio systems
  • Home Theater Systems
  • Set-top boxes
  • Digital audio effects processors
  • 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.

    Evaluation Kits

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    Product Details

    This page contains evaluation board documentation and ordering information for evaluating the AD1974.

    Product Details

    The Analog Devices USBi “USB Interface” (EVAL-ADUSB2EBZ) board is the interface between your PC's USB port and SigmaDSP hardware's data input pins. This interface can be used with any evaluation board which includes an External SPI/I²C header (Aardvark Header). The EVAL-ADUSB2EBZ board is capable of both SPI and I²C communication (which is user selectable) and can supply IOVDD of either 3.3V or 1.8V.The USBi interface is powered from the computer's USB port.

    To Install the USBi Board:
    • Connect the USB cable to the USBi Board a spare USB port on your PC.
    • The Windows “Found New Hardware Wizard” will launch.
    • Choose “Install from a list or a specific location” and click “Next”.
    • Select “Search for the best driver in these locations” and Check the box for “Include this location in the search.”
    • Press the “Browse” button and locate the appropriate driver file in the SigmaStudio application folder (default folder is C:\Program Files\Analog Devices Inc\Sigma Studio\USB drivers): Select the CyUSB.inf file.
    • Click “Continue Anyway” if you're prompted with “This software has not passed Windows Logo testing.”
    Using USBi in SigmaStudio:
    To communication between SigmaStudio and the USBi board, a communication channel block must be added to the Schematic design. To locate the block, select the Hardware Configuration Tab, int the ToolBox or Tree ToolBox window choose the “Communication Channels” category, and select the USBi block.

    USBi

    This block provides connections for multiple processors (ICs / DSPs), allowing you to use multiple processors in a single design. This block allows you to explicitly specify both the communication protocol (SPI or I²C) and the part's address, I²C address or SPI clatch line. The DSP hardware's address must match the block's selected address for communication to function properly. See the parts data sheet for more information about addressing (e.g. ADR_SEL, ADDR0, or ADDR1 pins). The default USBi protocol is I²C, to enable SPI, you must first select an SPI address in the block's drop down menu and then perform three write operations (e.g. press the write button the Register Read/Write Window 3 times). The USBi hardware has LEDs which indicate the current mode, I²C or SPI.

    Software & Systems Requirements

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    Tools & Simulations

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    IBIS Models

    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.

    AD1974 Material Declaration
    PCN-PDN Information Quality And Reliability Symbols and Footprints

    Reviews

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    Overview

    2 Reviews
    2 out of 2 (100%) customers recommend this product.
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    Most Helpful Review

    by Anonymous
    it is the best of the class! no words! smallest, cheap and effective! world class product by AD

    Most Recent Review

    by colonel
    very good product, but the datasheet is a big mess...

    All Reviews

    by colonel, 28 May 14
    best but datasheet is worse
    very good product, but the datasheet is a big mess...
    Was this Helpful?Helpful(0)
    by Anonymous, 6 Jan 13
    just the best
    it is the best of the class! no words! smallest, cheap and effective! world class product by AD
    Was this Helpful?Helpful(1)

    Sample & Buy

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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.


    Price Table Help

     
    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.