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ADA4661-2:  18 V, Precision, 725 μA, 4 MHz CMOS RRIO Operational Amplifier

Product Details

Product Status:Recommended for New Designs

The ADA4661-2 is a dual, precision, rail-to-rail input/output amplifier optimized for low power, high bandwidth, and wide operating supply voltage range applications.

The ADA4661-2 performance is guaranteed at 3.0 V, 10 V, and 18 V power supply voltages. It is an excellent selection for applications that use single-ended supplies of 3.3 V, 5 V, 10 V, 12 V and 15 V, and dual supplies of ±2.5 V, ±3.3 V, and ±5 V. It uses the Analog Devices, Inc., patented DigiTrim® trimming technique, which achieves low offset voltage. Additionally, the unique design architecture of the ADA4661-2 allows it to have excellent power supply rejection, common-mode rejection, and offset voltage when operating in the common-mode voltage range of −VSY + 1.5 V to +VSY − 1.5 V.

The ADA4661-2 is specified over the extended industrial temperature range (−40°C to +125°C) and is available in 8-lead MSOP and 8-lead LFCSP (3 mm × 3 mm) packages.


  • Current shunt monitors
  • Active filters
  • Portable medical equipment
  • Buffer/level shifting
  • High impedance sensor interfaces
  • Battery powered instrumentation


  • Low power at high voltage (18 V):
    725 μA maximum
  • Low offset voltage:
    -- 150 μV maximum at Vsy/2
    -- 300 μV maximum over entire common mode range
  • Low input bias current:
    15 pA maximum
  • Gain bandwidth product:
    4 MHz typical at Av = 100
  • Unity-gain crossover:
    4 MHz typical
  • -3 dB closed-loop bandwidth:
    2.1 MHz typical
  • Single-supply operation:
    3 V to 18 V
  • Dual-supply operation:
    ±1.5 V to ±9 V
  • Unity-gain stable

Pin Configuration for ADA4661-2

Similar Products

Looking for lower price, less precise alternative with similar performance and features, see the ADA4666-2.


Title Content Type File Type
ADA4661-2: 18 V, Precision, 725 μA, 4 MHz CMOS RRIO Operational Amplifier Data Sheet (Rev 0, 07/2013) (pdf, 121 kB) Data Sheets PDF
MT-047: Op Amp Noise  (pdf, 72 kB) Tutorials PDF
MT-035: Op Amp Inputs, Outputs, Single-Supply, and Rail-to-Rail Issues  (pdf, 115 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
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Amplifiers & Linear Tools
Design with confidence using these free tools for circuit simulation, design optimization and product selection.
Design Tool HTML
ADA4661 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

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

ADA4661-2 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADA4661-2ACPZ-R7 Status: Production 8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad 8 Ind Reel, 1500 - $1.13 Y  Material Info PCN Purchase Sample
ADA4661-2ACPZ-RL Status: Production 8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad 8 Ind Reel, 5000 - $1.13 Y  Material Info PCN Purchase
ADA4661-2ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.36 $1.13 Y  Material Info Notify Me Purchase Sample
ADA4661-2ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.13 Y  Material Info Notify Me Purchase
ADA4661-2ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.13 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.

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