content here.
content here.

AD7687:  250 KSPS 16-BIT DIFFERENTIAL PULSAR® A/D CONVERTER IN µSOIC/QFN

The AD7687 is a 16-bit, 250 kSPS, charge redistribution successive-approximation Analog-to-Digital Converter which operates from a single power supply, VDD between 2.3 V to 5.5 V. It contains a very low power high-speed 16-bit sampling ADC with no missing codes, an internal conversion clock and a versatile serial interface port. The part also contains a low noise, wide bandwidth, very short ...More

AD7687:  250 KSPS 16-BIT DIFFERENTIAL PULSAR® A/D CONVERTER IN µSOIC/QFN

Product Description

The AD7687 is a 16-bit, 250 kSPS, charge redistribution successive-approximation Analog-to-Digital Converter which operates from a single power supply, VDD between 2.3 V to 5.5 V. It contains a very low power high-speed 16-bit sampling ADC with no missing codes, an internal conversion clock and a versatile serial interface port. The part also contains a low noise, wide bandwidth, very short aperture delay track/hold circuit. On the CNV rising edge, it samples the voltage difference between IN+ and IN- pins. The voltages on these pins usually swing in opposite phase between 0 V to REF. The reference voltage REF is applied externally and can be set up to the supply voltage.

Its power scales linearly with throughput.

The SPI compatible serial interface also features the ability, using the SDI input, to “Daisy chain” several ADCs on a single 3 wire bus and provides an optional Busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V or 5 V logic using the separate supply VIO.

The AD7687 is housed in a 10-lead µSOIC or 10-lead QFN (Chip Scale package) with operation specified from –40°C to +85°C.

Applications

  • Battery Powered Equipment
  • Medical instruments
  • Mobile communications
  • Personal digital assistants
  • Data Acquisition
  • Instrumentation
  • Medical Instruments
  • Process Control

    • RESOURCES & TOOLS

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

    EVALUATION BOARDS & DEVELOPMENT KITS

    Ts

    TOOLS, SOFTWARE & SIMULATION MODELS

    • 16 Bits Resolution with No Missing 16-Bit Codes
    • Throughput: 250 kSPS
    • INL: ±0.4 LSB Typ, ±1.5 LSB Max
    • S/(N+D): 95 dB @ 20 kHz
    • Power Dissipation:
      1.35 mW @ 2.5V/100 kSPS
      1.4 µW @ 2.5 V/100 SPS
    • True Differential Analog input range: ±VREF 0 V to VREF with VREF up to VDD on Both Inputs
    • No Pipeline Delay
    • Single Supply Operation 2.3 V to 5.5 V with 1.8V to 5 V Logic Interface
    • Multiple ADCs Daisy Chain, with BUSY Indicator
    • Serial Interface SPI/QSPI/Wire/DSP compatible
    • µSOIC Package (µSO8 Size) and 3 mm by 3 mm QFN (LFCSP) (SOT23 size)
    • Pin-to-Pin compatible with the AD7685, AD7686, AD7688
    • Resolution (Bits): 16bit
    • T-Put Rate: 250kSPS
    • # Chan: 1
    • Supply V: Single(+2.3 to +5.5),Single(+2.5),Single(+3),Single(+3.3),Single(+5)
    • Pwr Diss: 12.5mW
    • Interface: Ser,SPI
    • Ain Range: (2Vref) p-p
    • SNR (dB): 95.5dB
    • Pkg Type: CSP,SOP

    Functional Block Diagram for AD7687

    Pricing, Packaging & Availability

    Print Table
    back to top
    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.