ADA4661-2

RECOMMENDED FOR NEW DESIGNS

ADA4661-2

18 V, Precision, 725 μA, 4 MHz CMOS RRIO Operational Amplifier

RECOMMENDED FOR NEW DESIGNS

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Features

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 A_v = 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
Download ADA4661-2-KGD Data Sheet
Available As Known Good Die and fully guaranteed to data sheet specifications

Additional Details

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 −V_SY + 1.5 V to +V_SY − 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.

Applications

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

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $1.46

Technical Documents 5

ADA4661-2: 18 V, Precision, 725 μA, 4 MHz CMOS RRIO Operational Amplifier Data Sheet (Rev.0) 02/11/2013

ADA4661-2-KGD: Known Good Die Data Sheet (Rev.0) 12/20/2021

AN-763: Dual Universal Precision Op Amp Evaluation Board (Rev.C) 03/09/2005

When Good Electrons Go Bad: How to Protect Your Analog Front End 01/01/2019

A Simple Way of Measuring Soil Moisture and pH with Temperature Compensation 06/01/2019

Design Resources 6

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADA4661-2-KGD-WP	CHIPS OR DIE	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4661-2ACPZ-R7	8-Lead LFCSP (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4661-2ACPZ-RL	8-Lead LFCSP (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4661-2ARMZ	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4661-2ARMZ-R7	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADA4661-2ARMZ-RL	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADA4661-2-KGD-WP
Pin/Package Drawing
CHIPS OR DIE
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4661-2ACPZ-R7
Pin/Package Drawing
8-Lead LFCSP (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4661-2ACPZ-RL
Pin/Package Drawing
8-Lead LFCSP (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4661-2ARMZ
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4661-2ARMZ-R7
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADA4661-2ARMZ-RL
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2014

- 13_0223

Assembly and Test Transfer of Select 2x3mm and 3x3mm LFCSP Products to STATS ChipPAC China

ADA4661-2ACPZ-R7

PRODUCTION

ADA4661-2ACPZ-RL

PRODUCTION

pdf

PCN13_0223_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

pdf

Test Correlation Report

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2014

- 13_0223

Assembly and Test Transfer of Select 2x3mm and 3x3mm LFCSP Products to STATS ChipPAC China

ADA4661-2ACPZ-R7

PRODUCTION

ADA4661-2ACPZ-RL

PRODUCTION

pdf

PCN13_0223_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

pdf

Test Correlation Report

Circuit Recommendations 2

16 Bit, Biopotential Sensing Signal Chain

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LTspice Simulation

18 Bit, Biopotential Sensing Signal Chain

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LTspice Simulation

LTspice 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

ADA4661-2 - Operational Amplifiers (Op Amps)

1.41 K

Precision ADC Driver Tool

The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input

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Analog Photodiode Wizard

Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

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Amplifiers & Linear Tools

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Analog Filter Wizard

Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

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Signal Chain Designer - BETA

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool