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AD823:  16 MHz, Rail-to-Rail FET Input Dual Amplifier

Product Details


Newer Alternatives:
  • AD823A: 17 MHz, Rail-to-Rail FET Input Dual Amplifier

The AD823 is a dual precision, 16 MHz, JFET input op amp that can operate from a single supply of 3.0 V to 36 V or from dual supplies of ±1.5 V to ±18 V. It has true single-supply capability with an input voltage range extending below ground in single-supply mode. Output voltage swing extends to within 50 mV of each rail for IOUT ≤ 100 μA, providing outstanding output dynamic range.

An offset voltage of 800 μV maximum, an offset voltage drift of 2 μV/°C, input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to a Gigaohm. It provides 16 MHz, −3 dB bandwidth, −108 dB THD @ 20 kHz, and a 22 V/μs slew rate with a low supply current of 2.6 mA per amplifier. The AD823 drives up to 500 pF of direct capacitive load as a follower and provides an output current of 15 mA, 0.5 V from the supply rails. This allows the amplifier to handle a wide range of load conditions.

This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for applications such as A/D drivers, high speed active filters, and other low voltage, high dynamic range systems.

The AD823 is available over the industrial temperature range of −40°C to +85°C and is offered in both 8-lead PDIP and 8-lead SOIC packages.

Applications

  • Battery-powered precision instrumentation
  • Photodiode preamps
  • Active filters
  • 12-bit to 16-bit data acquisition systems
  • Medical instrumentation

FEATURES and BENEFITS

  • Single-supply operation
    - Output swings rail-to-rail
    - Input voltage range extends below ground
    - Single-supply capability from 3 V to 36 V
  • High load drive
    - Capacitive load drive of 500 pF, G = +1
    - Output current of 15 mA, 0.5 V from supplies
  • Low distortion: −108 dBc worst harmonic @ 20 kHz
  • Low noise: 16 nV/√Hz @ 10 kHz
  • Good dc performance
    - 800 μV max input offset voltage
    - 2 μV/°C offset voltage drift
    - 25 pA maximum input bias current
  • Excellent ac performance on 2.6 mA/amplifier
    −3 dB bandwidth of 16 MHz, G = +1
    - 350 ns settling time to 0.01% (2 V step)
    - Slew rate of 22 V/μs
  • No phase inversion with inputs to the supply rails

Connection Diagram for AD823

Documentation

Title Content Type File Type
AD823: Dual, 16 MHz, Rail-to-Rail FET Input Amplifier Data Sheet  (Rev E, 11/2011) (pdf, 459 kB) Data Sheets PDF
AN-108: 08: JFET-Input Amps are Unrivaled for Speed and Accuracy  (pdf, 499 kB) Application Notes 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
AN-257: Careful Design Tames High Speed Op Amps  (pdf, 611 kB) Application Notes PDF
AN-253: Find Op Amp Noise with Spreadsheet  (pdf, 77 kB) Application Notes PDF
MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps  (pdf, 62 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-128: Universal Evaluation Board for Dual High Speed Op Amps in SOIC Packages  (pdf, 208 kB) User Guides PDF
High Speed Amplifiers Selection Table  (pdf, 77 kB) Product Selection Guide PDF
RAQs index Rarely Asked Questions 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
ADIsimOpAmp™
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
AD823A SPICE Macro-Model SPICE Models HTML
AD823 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

AD823 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD823ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $3.24 $2.92 Y  Material Info PCN Purchase
AD823AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.56 $3.21 N  Material Info Notify Me Purchase
AD823AR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $3.21 N  Material Info Notify Me Purchase
AD823AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $3.56 $3.21 N  Material Info Notify Me Purchase
AD823ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.24 $2.92 Y  Material Info Notify Me Purchase
AD823ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $3.24 $2.92 Y  Material Info Notify Me Purchase
AD823ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.92 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.

AD823 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD823AR-EBZ Status: Production 8-Lead SOIC Bare Evaluation Board $18.25 Yes -
AD823ARZ Status: Production 8-Lead SOIC $5.09 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.

Check Inventory & Purchase

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