Overview

Features and Benefits

  • Micropower at high voltage (18V): 22 µA maximum
  • Low input bias current:
    20 pA maximum
  • Gain bandwidth product:
    240 kHz at AV =100 typical
  • Unity-gain crossover: 240 kHz
  • −3 dB closed-loop bandwidth:
     310 kHz
  • Slew rate: 80 V/ms
  • Large signal voltage gain:
    110 dB minimum
  • Single-supply operation:
    2.7 V to 18 V
  • Dual-supply operation:
    ±1.35 V to ±9 V
  • Unity-gain stable
  • Excellent electromagnetic interference immunity

Product Details

The AD8546 and AD8548 are dual and quad micropower, high input impedance amplifiers optimized for low power and wide operating supply voltage range applications.

The AD8546/AD8548 rail-to-rail input/output (RRIO) feature provides increased dynamic range to drive low frequency data converters, making these amplifiers ideal for dc gain and buffering of sensor front ends or high impedance input sources used in wireless or remote sensors or transmitters.

The low supply current specification (22 µA) of the AD8546/ AD8548 over a wide operating voltage range of 2.7 V to 18 V or dual supplies (±1.35 V to ±9 V) makes these amplifiers useful for a variety of battery-powered, portable applications, such as ECGs, pulse monitors, glucose meters, smoke and fire detectors, vibration monitors, and backup battery sensors.

The AD8546/AD8548 are specified over the extended industrial temperature range of −40°C to +125°C. The AD8546 is available in an 8-lead MSOP package; the AD8548 is available in a 14-lead SOIC_N package.

Applications

  • Portable medical equipment
  • Remote sensors
  • Transimpedance amplifiers
  • Current monitors
  • 4 mA to 20 mA loop drivers
  • Buffer/level shifting

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Evaluation Boards Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.