content here.
content here.

AD7400A:  Isolated Sigma-Delta Modulator

The AD7400A1 is a second-order, Σ-Δ modulator that converts an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The analog input is sampled continuously by the analog ...More

AD7400A:  Isolated Sigma-Delta Modulator

Product Description

The AD7400A1 is a second-order, Σ-Δ modulator that converts an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The analog input is sampled continuously by the analog modulator, eliminating the need for external sample-and-hold circuitry. The input information is contained in the output stream as a density of ones with a data rate of 10 MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O can use a 5 V or a 3 V supply (VDD2).

The serial interface is digitally isolated. High speed CMOS, combined with monolithic air core transformer technology, means the on-chip isolation provides outstanding performance characteristics superior to alternatives such as optocoupler devices. The part contains an on-chip reference and has an operating temperature range of −40°C to +125°C. The AD7400A is offered in an 8-lead surface-mount PDIP with gull wing leads and a 16-lead SOIC package.

Applications

  • AC motor controls
  • Shunt current monitoring
  • Data acquisition systems
  • Analog-to-digital and opto-isolator replacements

    • 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents are pending..

    Data Sheet, Rev. A, 9/08

    RESOURCES & TOOLS

    What is your task? Try Lead the Way AdvisorTM BETA
    Eb

    EVALUATION BOARDS & DEVELOPMENT KITS

    • 10 MHz clock rate
    • Second-order modulator
    • 16 bits no missing codes
    • ±2 LSB INL typical at 16 bits
    • 1.5 μV/°C typical offset drift
    • On-board digital isolator
    • 8-lead surface-mount PDIP package with gull wing leads and 16-lead SOIC package
    • See Data Sheet for Additional Information
    • Resolution (Bits): 16bit
    • # Chan: 1
    • Supply V: Multi(+5, +5 Isolated)
    • Pwr Diss: 95mW
    • Interface: Ser
    • Pkg Type: SOIC

    Functional Block Diagram for AD7400A

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Resolution (Bits) Sample Rate # Chan Supply V Pwr Diss Interface Ain Range Pkg Type ADC Architecture Price* (1000-4999) Product Description
    AD7400 16 10MSPS 1 Multi(+3, +5 Isolated), Multi(+5, +5 Isolated) 90mW Ser ± 0.2 V Diff, 0.4 V p-p SOIC Sigma-Delta Modulator $4.05 Isolated Sigma-Delta Modulator (10 MHz Data Rate)
    AD7400A 16 10MSPS 1 Multi(+5, +5 Isolated) 95mW Ser 0.5 V p-p, 0.64 V p-p SOIC Sigma-Delta Modulator $4.00 Isolated Sigma-Delta Modulator
    AD7401 16 20MSPS 1 Multi(+3, +5 Isolated), Multi(+5, +5 Isolated) 100mW Ser 0.4 V p-p SOIC Sigma-Delta Modulator $4.05 Input/Output Isolated Sigma-Delta Modulator (Up to 20 MHz Data Rate)
    AD7401A 16 20MSPS 1 Multi(+5, +5 Isolated) 105mW Ser 0.32 V p-p SOIC Sigma-Delta Modulator $4.00 Isolated Sigma-Delta Modulator
    back to top

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

    Print Table
    back to top

    Help

    Model
    The model number is a specific version of a generic that can be purchased or sampled.

    Status
    Status indicates the current lifecycle of the product. This can be one of 4 stages:
    • Pre-Release: The model has not been released to general production, but samples may be available.
    • Production: The model is currently being produced, and generally available for purchase and sampling.
    • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
    • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
    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.

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    RoHS Compliant
    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

    View PCN
    This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

    *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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.