Most Power Efficient Drivers For 12-, 14- And 16-bit A/D Converters Unveiled

ADI’s ADA4805 family of amplifiers featuring Dynamic Power Scaling provide best-in-class offset drift, slew rate, noise and distortion performance for portable, battery powered and high-density data acquisition equipment.

Sep 23 2014 -Norwood, MA
  • Analog Devices, Inc. (NASDAQ: ADI), a global leader in high-performance semiconductors for signal processing applications, today introduced a family of low-power rail-to-rail amplifiers for high-speed data acquisition systems that require exceptional accuracy, precision and power efficiency. For system designers who are looking to achieve full datasheet specifications from high resolution A/D converters, the ADA4805-1 (single) and ADA4805-2 (dual) amplifiers provide the only solution with quiescent current as low as 495µA. The amplifiers’ Dynamic Power Scaling (DPS) feature allows users to dynamically manage the power consumption by shutting-down the amplifier between analog-to-digital converter samples. This further reduces by up to 90 percent the power consumption — with no performance degradation —when compared to similar solutions. Watch this video to learn more about the industry’s most power efficient A/D converter drivers.

    • Order ADA4805 samples, evaluation boards or download data sheets
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    The 100-MHz ADA4805-1 and ADA4805-2 amplifiers achieve a high slew rate of 160 V/μs, low noise (5.9 nV/√Hz at 100 kHz) and low distortion (−102 dBc/−116 dBc HD2/HD3 at 100 kHz) while consuming only 1.5 mW of power. The amplifiers are designed for power-sensitive portable and battery-powered data acquisition devices, such as handheld or portable test and measurement instruments, battery-powered industrial equipment and remote environmental monitoring devices. They can also be used to reduce power and thermal dissipation in high-density applications such as cellular base stations and medical imaging equipment.

    With exceptionally low offset-voltage drift of 1.5µV/°C maximum (0.2μV / 0C typical), the ADA4805 family offers eight times lower drift performance than competing high-speed (100MHz) amplifiers. The combination of superior ac and dc performance allow designers to enhance system sensitivity, dynamic range and overall system accuracy.

    The ADA4805-1/-2 amplifiers have a wide voltage range, supporting 3-V supplies, and in applications that require a wider dynamic range can also operate on supplies as high as +/-5V.

    Pricing, Availability and Complementary Components

    The ADA4805 family efficiently drive a variety of A/D converters such as the AD7980 16-bit 1 MSPS; AD7091 ultra low-power 12-bit, 1 MSPS; AD7902 dual pseudo differential 16-bit 1 MSPS and AD7988 ultra low-power 16-bit SAR converters.

    Product Number of Amps Availability Temperature Range Price Each Per 1K Packaging
    ADA4805-1 1 NOW
    -40°C to +125°C $1.05 SC70
    ADA4805-1 1 NOW
    -40°C to +125°C $0.95 SOT23
    ADA4805-2 2 NOW
    -40°C to +125°C $1.64 MSOP
    ADA4805-2 2 October 2014 -40°C to +125°C $1.79 LFCSP

  • About Analog Devices
  • Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.
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