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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 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 ...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

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    EVALUATION BOARDS & DEVELOPMENT KITS

    • 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
    • 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

    Functional Block Diagram for AD7766

    Similar Products

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    AD7767 24 128KSPS 1 18mW
    AD7982 18 1MSPS 1 8.6mW
    AD7984 18 1.33MSPS 1 14mW
    AD7980 16 1MSPS 1 10mW
    AD7687 16 250KSPS 1 12.5mW
    AD7694 16 250KSPS 1 6.3mW
    AD7983 16 1.33MSPS 1 12mW
    AD7942 14 250KSPS 1 12.5mW
    AD9874 24 541.5KSPS 1 79.5mW
    AD7765 24 156KSPS 1 371mW
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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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.