AD7766:  24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs

The AD7766/AD7766-1/AD7766-2 are high performance 24-bit oversampled SAR analog-to-digital converters (ADC). The AD7766/AD7766-1/AD7766-2 combine the benefits of a large dynamic range and input ...More

AD7766:  24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs

Product Description

The AD7766/AD7766-1/AD7766-2 are high performance 24-bit oversampled SAR analog-to-digital converters (ADC). The AD7766/AD7766-1/AD7766-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, all contained in a 16-lead TSSOP package.

Ideal for ultralow power data acquisition (such as PCI- and USB-based systems), the AD7766/AD7766-1/AD7766-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7766/AD7766-1/AD7766-2 ideally suited for measuring small signal changes over a wide dynamic range. This is particularly suitable for applications where small changes on the input are measured on larger ac or dc signals. In such an application, the AD7766/AD7766-1/AD7766-2 accurately gather both ac and dc information.

The AD7766/AD7766-1/AD7766-2 include an on-board digital filter (complete with linear phase response) that acts to eliminate out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements. Other features of the AD7766 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7766 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7766 devices.

The AD7766/AD7766-1/AD7766-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from −40°C to +105°C.

Applications

  • Low power PCI/USB data acquisition systems
  • Low power wireless acquisition systems
  • Vibration analysis
  • Instrumentation
  • High precision medical acquisition

    • Data Sheet, Rev. 0, 8/07

    Features

    • Oversampled successive approximation (SAR) architecture
    • High performance ac and dc accuracy, low power
      115.5 dB dynamic range, 32 kSPS (AD7766-2)
      112.5 dB dynamic range, 64 kSPS (AD7766-1)
      109.5 dB dynamic range, 128 kSPS (AD7766)
      −112 dB THD
    • Exceptionally low power
      8.5 mW, 32 kSPS (AD7766-2)
      10.5 mW, 64 kSPS (AD7766-1)
      15 mW, 128 kSPS (AD7766)
    • High dc accuracy
      24 bits, no missing codes (NMC)
      INL: ±6 ppm (typical), ±15 ppm (maximum)
    • Low temperature drift
      Zero error drift: 15 nV/°C
      Gain error drift: 0.4 ppm/°C
    • On-chip low-pass FIR filter
      Linear phase response
      Pass-band ripple: ±0.005 dB
      Stop-band attenuation: 100 dB
    • 2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options
    • Flexible interfacing options
      Synchronization of multiple devices
      Daisy chain capability
    • Power-down function
    • Temperature range: −40°C to +105°C

    Diagrams

    AD7766 Diagram
    Functional Block Diagram for AD7766

    Specifications

    Resolution (Bits) 24bit
    T-Put Rate 128kSPS
    # Chan 1
    Supply V Single(+2.5)
    Pwr Diss 18mW
    Interface Ser
    Ain Range (2Vref) p-p
    SNR (dB) 108.5dB
    Pkg Type SOP

    Explore Other Products

    AD7357 - Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

    AD7781 - 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

    AD7192 - 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA

    AD7780 - 24-Bit Pin-Programmable Low Power Σ−Δ ADC

    Subscribe to New Products Feed More
    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
    AD7766 24 128KSPS 1 18mW
    AD7767 24 128KSPS 1 18mW
    AD7982 18 1MSPS 1 8.6mW
    AD7984 18 1.33MSPS 1 14mW
    AD7980 16 1MSPS 1 10mW
    AD7983 16 1.33MSPS 1 12mW
    AD7687 16 250KSPS 1 12.5mW
    AD7694 16 250KSPS 1 6.3mW
    AD7942 14 250KSPS 1 12.5mW
    AD9874 24 541.5KSPS 1 79.5mW
    AD7765 24 156KSPS 1 371mW
    Pricing, Packaging & Availability

    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.

    *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.

    View Sales and Distribution Offices