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AD8027:  Low Distortion, High Speed Rail-to-Rail Input/Output Amplifier

Product Details

The AD8027 is a high speed amplifier with rail-to-rail input and output that operates on low supply voltages and is optimized for high performance and wide dynamic signal range. The AD8027 has low noise (4.3 nV/ÖHz, 1.6 pA/ÖHz) and low distortion (120 dBc @ 1 MHz). In applications that use a fraction of, or the entire input dynamic range and require low distortion, the AD8027 is an ideal choice.

Many rail-to-rail input amplifiers have an input stage that switches from one differential pair to another as the input signal crosses a threshold voltage, which causes distortion. The AD8027 has a unique feature that allows the user to select the input crossover threshold voltage through the SELECT pin. This feature controls the voltage at which the complementary transistor input pairs switch. The AD8027 also has intrinsically low crossover distortion.

The AD8027 is available in SOIC-8 and SOT23-6 packages. It is rated to work over the industrial temperature range of -40°C to +125°C.


  • High speed
    190 MHz, -3 dB bandwidth (G = +1)
    100 V/µs slew rate
  • Low distortion
    120 dBc @ 1 MHz SFDR
    80 dBc @ 5 MHz SFDR
  • Selectable input crossover threshold
  • Low noise: 4.3 nV/√Hz; 1.6 pA/√Hz
  • Low offset voltage: 900 µV max
  • Low power: 6.5 mA/amplifier supply current
  • Power-down mode
  • No phase reversal
  • Wide supply range: 2.7 V to 12 V
  • Small packaging: SOIC-8, SOT23-6

Pin Configuration Diagram for AD8027


Title Content Type File Type
AD8027/AD8028: Low Distortion, High-Speed Rail-to-Rail Input/Output Amplifiers Data Sheet  (Rev C, 03/2005) (pdf, 606 kB) Data Sheets PDF
AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications  (pdf, 166 kB) Application Notes PDF
AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps  (pdf, 55 kB)
So far most clamping amplifiers have relied upon an output clamping architecture and are called output clamp amps (OCAs). A new architecture called an input clamp amp (ICA) offers superior clamping accuracy and lower distortion.
Application Notes PDF
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems  (pdf, 228 kB)
Movement towards lower power supply voltages is driven by the demand that systems consume less and less power coupled with the desire to reduce the number of power supply voltages in the system. The following applications are discussed: Single-Ended and Differential Input ADC Input Circuits, Video Line Driver, Active Filter, HDSL Transceiver, and Transformer Drive Circuits.
Application Notes PDF
CN0332: Magnetoresistive (MR) Rotational Speed Sensor  (pdf, 320 kB) Circuit Note PDF
MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps  (pdf, 62 kB) Tutorials PDF
MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters  (pdf, 69 kB) Tutorials PDF
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps  (pdf, 66 kB) Tutorials PDF
MT-056: High Speed Voltage Feedback Op Amps  (pdf, 109 kB) Tutorials PDF
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR  (pdf, 104 kB) Tutorials PDF
MT-052: Op Amp Noise Figure: Don't Be Misled  (pdf, 60 kB) Tutorials PDF
MT-050: Op Amp Total Output Noise Calculations for Second-Order System  (pdf, 38 kB) Tutorials PDF
MT-049: Op Amp Total Output Noise Calculations for Single-Pole System  (pdf, 40 kB) Tutorials PDF
MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth  (pdf, 81 kB) Tutorials PDF
MT-047: Op Amp Noise  (pdf, 72 kB) Tutorials PDF
MT-033: Voltage Feedback Op Amp Gain and Bandwidth  (pdf, 251 kB) Tutorials PDF
MT-032: Ideal Voltage Feedback (VFB) Op Amp  (pdf, 65 kB) Tutorials PDF
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
Webcasts WEBCAST
UG-127: Universal Evaluation Board for High Speed Op Amps in SOT-23-5/SOT-23-6 Packages  (pdf, 273 kB) User Guides PDF
UG-101: Evaluation Board User Guide  (pdf, 189 kB) User Guides PDF
Op Amps Increasingly Swing Rail-to-Rail
(EE Times, February 13,2003)
Technical Articles HTML
Low-Cost Video Multiplexing Using High-Speed Amplifiers Analog Dialogue HTML
SAR ADC & Driver Quick-Match Guide  (pdf, 251 kB)
Find drivers for ADI's most popular single-ended and differential SAR ADCs based on your specific application conditions.
Product Selection Guide PDF
High Speed Amplifiers Selection Table  (pdf, 77 kB) Product Selection Guide PDF
RAQs index Rarely Asked Questions HTML
When running on a single supply, my op amp's output is highly distorted. Could this be some kind of headroom issue? FAQs/RAQs HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
dBm/dBu/dBv Calculator
This calculator converts between standard units of power measurement and signal strength.
Utilities and Conversions HTML
Power Dissipation vs Die Temp
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
Utilities and Conversions HTML
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
OpAmp Stability
An applet for demonstrating stability effects in opamp buffers.
Design Calculators HTML
AD8027 SPICE 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.

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Price, packaging, availability

AD8027 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8027ARTZ-R2 Status: Production 6 ld SOT-23 6 Ind Reel, 250 $1.39 $1.39 Y  Material Info Notify Me Purchase
AD8027ARTZ-REEL Status: Last Time Buy 6 ld SOT-23 6 Ind Reel, 10000 - - Y  Material Info PCN/PDN Purchase
AD8027ARTZ-REEL7 Status: Production 6 ld SOT-23 6 Ind Reel, 3000 - $1.20 Y  Material Info PCN Purchase Sample
AD8027ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.42 $1.20 Y  Material Info Notify Me Purchase Sample
AD8027ARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.20 Y  Material Info Notify Me Purchase
AD8027ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $1.42 $1.20 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.

AD8027 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
AD8027ARTZ-REEL7 Status: Production 6-Lead SOT-23 - Yes -
AD8027AR-EBZ Status: Production 8-Lead SOIC Bare Evaluation Board $18.25 Yes -
AD8027ART-EBZ Status: Production 6-Lead SOT-23 Bare Evaluation Board $18.25 Yes -
AD8027ARZ Status: Production 8-Lead SOIC $1.98 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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