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AD8548:  18V, 22µA, 45nV/√Hz, RRIO, Quad Op Amp

Product Details

Product Status:Recommended for New Designs

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.


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


  • 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

Pin Configuration for AD8548

Similar Products

AD8613, AD8617, AD8619: available in single, dual, and quad channel versions operating at 5V offering lower offset, input bias current, and voltage noise with higher bandwidth, slew rate, and output drive.


Title Content Type File Type
AD8546/AD8548: 22 μA, RRIO, CMOS, 18 V Operational Amplifier Data Sheet (Rev C, 09/2012) (PDF, 689 kB) Data Sheets PDF
Op Amp Applications Handbook Design Handbooks HTML
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps  (pdf, 66 kB) Tutorials PDF
MT-047: Op Amp Noise  (pdf, 72 kB) Tutorials PDF
MS-2212: The Maximum Supply Current That Wasn't  (pdf, 241 kB) Technical Articles PDF
Amplifiers for Signal Conditioning - Section 3  (PDF, 397 kB)
By Walt Kester, James Bryant, Walt Jung
Technical Articles PDF
Avoiding Op-Amp Instability Problems In Single-Supply Applications
(Analog Dialogue, Vol. 35, No. 2, March-May, 2001)
Analog Dialogue HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
This tool will help with the selection, evaluation and troubleshooting of voltage feedback Op-Amps. It uses typical data to model the behavior of a selected amplifier. It allows a user to select an amplifier, configure a circuit, apply a signal and evaluate the performance. It is useful for checking an amplifier's spec's such as Bandwidth, Slew Rate, Input/Output Range, Gain Error, Load Current, Stability Issues and DC Errors in a given circuit.
ADIsim Design/Simulation Tools HTML
Analog Bridge Wizard
The Analog Bridge Wizard recommends amplifiers and ADC's for your bridge application. Find out which op-amp or in-amp is best for your design, and view the error budget analysis for that solution.
ADIsim Design/Simulation Tools HTML
AD8548 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD8548 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8548ARZ Status: Production 14 ld SOIC 14 Ind Tube, 56 $1.28 $1.05 Y  Material Info Notify Me Purchase Sample
AD8548ARZ-R7 Status: Production 14 ld SOIC 14 Ind Reel, 1000 - $1.05 Y  Material Info Notify Me Purchase
AD8548ARZ-RL Status: Production 14 ld SOIC 14 Ind Reel, 2500 - $1.05 Y  Material Info Notify Me Purchase
Price Table Help

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.

EVAL-OPAMP-4 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-PRAOPAMP-4RUZ Status: Production QUAD 14-Lead TSSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-4RZ Status: Production QUAD R-14 lead SOIC Evaluation Board $20.19 Yes -

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.

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