AD8021

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AD8021

Low Noise, High Speed Amplifier for 16-Bit Systems

PRODUCTION

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Part Models 6

1ku List Price Starting From $1.54

Features

Low noise
2.1 nV/√Hz input voltage noise
2.1 pA/√Hz input current noise
Custom compensation
Constant bandwidth from G = -1 to G = -10
High speed
200 MHz (G = -1)
190 MHz (G = -10)
Low power
34 mW or 6.7 mA typ for 5 V supply
34 mW or 6.7 mA typ for 5 V supply
Low distortion
-93 dBc second harmonic, fc = 1 MHz
-108 dBc third harmonic, fc = 1 MHz
DC precision
1 mV max input offset voltage
0.5 µV/°C input offset voltage drift
Wide supply range, 5 V to 24 V
Low price
Small packaging Available in SOIC-8 and MSOP-8

Additional Details

The AD8021 is an exceptionally high performance, high speed voltage feedback amplifier that can be used in 16-bit resolution systems. It is designed to have both low voltage and low current noise (2.1 nV/√Hz typical and 2.1 pA/√Hz typical) while operating at the lowest quiescent supply current (7 mA @ ±5 V) among today's high speed, low noise op amps. The AD8021 operates over a wide range of supply voltages from ±2.25 V to ±12 V, as well as from single 5 V supplies, making it ideal for high speed, low power instruments. An output disable pin allows further reduction of the quiescent supply current to 1.3 mA.

The AD8021 is both technically superior and priced considerably less than comparable amps drawing much higher quiescent current. The AD8021 is a high speed, general-purpose amplifier, ideal for a wide variety of gain configurations, and can be used throughout a signal processing chain and in control loops. The AD8021 is available in both standard 8-lead SOIC and MSOP packages in the industrial temperature range of -40°C to +85°C.

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Ask a Question

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

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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 $1.54

Technical Documents 16

AD8021: Low Noise, High Speed Amplifier for 16-Bit Systems Data Sheet (Rev.F) 08/13/2001

UG-135: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead SOIC and Exposed Paddle) 04/22/2010

AN-253: Find Op Amp Noise with Spreadsheet 02/14/2015

AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications 02/14/2015

AN-358: Noise and Operational Amplifier Circuits 02/14/2015

AN-357: Operational Integrators 02/14/2015

AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev.0) 02/14/2015

AN-257: Careful Design Tames High Speed Op Amps 02/14/2015

AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev.B) 02/14/2015

AN-1502: Driving the AD7366/AD7367 Bipolar SAR ADC in Low Distortion DC-Coupled Applications (Rev.B) 11/15/2017

AN-1107: AC Signal Offset and Amplitude Control Using a Dual Channel Multiplying DAC and a Single I/V Converter 02/11/2010

AN-1085: Multiplying DACs—AC/Arbitrary Reference Applications 02/13/2010

AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps 08/07/2023

AN-358: Noise and Operational Amplifier Circuits 03/01/1969

AN-2540: Oversampled SAR ADC with PGA Achieving Greater Than 125 dB Dynamic Range 07/30/2024

AN-931: Understanding PulSAR ADC Support Circuitry 07/30/2020

Reference Materials 25

MT-056: High Speed Voltage Feedback Op Amps 02/03/2009

MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps 02/14/2015

MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps 02/14/2015

MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth 02/14/2015

MT-033: Voltage Feedback Op Amp Gain and Bandwidth 02/14/2015

MT-050: Op Amp Total Output Noise Calculations for Second-Order System 02/14/2015

MT-047: Op Amp Noise 02/14/2015

MT-032: Ideal Voltage Feedback (VFB) Op Amp 12/11/2008

MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters 02/14/2015

MT-049: Op Amp Total Output Noise Calculations for Single-Pole System 02/14/2015

MT-052: Op Amp Noise Figure: Don't Be Misled 02/14/2015

MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR 02/14/2015

High Speed Amplifiers Selection Table 02/27/2008

SAR ADC & Driver Quick-Match Guide 09/13/2013

Red Pitaya, STEMlab 125-10, Featuring AD8021, AD8066, AD8132, AD9608, AD9767, ADP5052

SAR Converter with PGA Achieves Dynamic Range of 125 dB 03/05/2019

Is Your Amplifier Disabled, or is it Merely Sleeping? 07/01/2010

What's Your Amplifier's Febricity Due to Electricity? 12/01/2007

Are leaky amps sinking your design? 08/01/2007

New High-Resolution Multiplying DACs Excel at Handling AC Signals 09/01/2010

Low-Cost Video Multiplexing Using High-Speed Amplifiers 01/01/2009

High Speed Op Amp Drives a 16-Bit, 1-MSPS Differential-Input A/D Converter 11/01/2002

Amplifier Input Protection... Friend or Foe? 05/01/2007

How to Lower Power Consumption in Data Acquisition Systems 04/10/2017

A Stress-Free Method for Choosing High-Speed Op Amps 05/08/2015

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
AD8021ARMZ	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
AD8021ARMZ-REEL	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
AD8021ARMZ-REEL7	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
AD8021ARZ	8-Lead SOIC	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
AD8021ARZ-REEL	8-Lead SOIC	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
AD8021ARZ-REEL7	8-Lead SOIC	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

AD8021ARMZ
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

AD8021ARMZ-REEL
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

AD8021ARMZ-REEL7
Pin/Package Drawing
8-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

AD8021ARZ
Pin/Package Drawing
8-Lead SOIC
Documentation

HTML Material Declaration

HTML Reliablity Data

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

AD8021ARZ-REEL
Pin/Package Drawing
8-Lead SOIC
Documentation

HTML Material Declaration

HTML Reliablity Data

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

AD8021ARZ-REEL7
Pin/Package Drawing
8-Lead SOIC
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

Jan 5, 2015

- 14_0246

Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices

AD8021ARMZ

PRODUCTION

AD8021ARMZ-REEL

PRODUCTION

AD8021ARMZ-REEL7

pdf

PCN14_0246_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

May 15, 2012

- 10_0006

Halogen Free Material Change for mini SOIC Products

AD8021ARMZ

PRODUCTION

AD8021ARMZ-REEL

PRODUCTION

AD8021ARMZ-REEL7

pdf

PCN10_0006_Form

xls

Material_Report

Qualification Report Summary

Filter by Model

Part Models

Product Lifecycle

PCN

Jan 5, 2015

- 14_0246

Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices

AD8021ARMZ

PRODUCTION

AD8021ARMZ-REEL

PRODUCTION

AD8021ARMZ-REEL7

pdf

PCN14_0246_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

May 15, 2012

- 10_0006

Halogen Free Material Change for mini SOIC Products

AD8021ARMZ

PRODUCTION

AD8021ARMZ-REEL

PRODUCTION

AD8021ARMZ-REEL7

pdf

PCN10_0006_Form

xls

Material_Report

Qualification Report Summary

Alternative Parts 2

Parts	Product Life Cycle	Description
ADA4895-1	RECOMMENDED FOR NEW DESIGNS	Low Power, 1 nV/√Hz, G ≥ 10 Stable, Rail-to-Rail Output Amplifier
ADA4897-1	RECOMMENDED FOR NEW DESIGNS	1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers

EVAL-HSAMP-1

Universal Evaluation Board for Single High Speed Operational Amplifiers

EVAL-HSAMP-1

Universal Evaluation Board for Single High Speed Operational Amplifiers

Features and Benefits

Enables quick breadboarding/prototyping
User defined circuit configuration
Edge mounted Subminiature Version A (SMA) connector
provisions Easy connection to test equipment and other circuits

Buy Now View Details

Product Detail

The Universal Single High Speed Amplifier Evaluation Boards are bare boards that enable users to quickly prototype a variety of amplifier circuits, which minimizes risk and reduces time to market. These boards are all RoHs Compliant. See ordering guide below on what board to order by lead count and package.

Resources

pdf

UG-084: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead, SOIC with Dedicated Feedback Pin and Exposed Paddle)

243 kB

PDF

UG-838: Evaluation Board for Single, High Speed Op Amps Offered in 5-Lead SOT-23 and 6-Lead SOT-23 Packages

184.4 K

PDF

UG-919: Universal Evaluation Board for Single, 8-Lead LFCSP Operational Amplifiers (Rev.0)

196.34 K

pdf

UG-112: Universal Evaluation Board for Single, High Speed Op Amps Offered in SC-70 Packages

270 kB

pdf

UG-135: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead SOIC and Exposed Paddle)

261 kB

PDF

UG-755: 8-Lead SOIC Amplifier Evaluation Board User Guide (Rev.A)

248.82 K

EVAL-HSAMP-1

Universal Evaluation Board for Single High Speed Operational Amplifiers

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

Open Tool

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.

Open Tool

VRMS/dBm/dBu/dBV calculators

A utility to convert between standard units of power measurement and signal strength.

Open Tool

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.

Open Tool

OpAmp Error Budget Calculator

An online tool to illustrate range, gain and accuracy issues with Op Amp.

Open Tool

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.

Open Tool

SPICE Model 1

Simulation Model

SPICE Model

AD8021 SPICE Macro Model

2.9 KB

18 Weeks Ago

-Vs connection  Part Number: AD8021

1 Years Ago

RE: AD8021 and DAC AD9102 noise and limitation

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Part Details

Documentation

Software & Part Ecosystem

Evaluation Kit

Tools & Simulations

Latest Discussions

AD8021

Features

Documentation

Data Sheet 1

User Guide 1

Application Note 14

Tutorial 12

Product Selection Guide 2

3rd Party Solutions 1

Rarely Asked Question Page 4

Analog Dialogue 4

Webcast 2

Jan 5, 2015

May 15, 2012

Software & Part Ecosystem

Evaluation Kits 1

EVAL-HSAMP-1

Features and Benefits

Evaluation Kits1

EVAL-HSAMP-1

Tools & Simulations 7

Precision ADC Driver Tool

Precision ADC Driver Tool

Analog Photodiode Wizard

Analog Photodiode Wizard

VRMS/dBm/dBu/dBV calculators

VRMS/dBm/dBu/dBV calculators

Power Dissipation vs Die Temp

Power Dissipation vs Die Temp

OpAmp Error Budget Calculator

OpAmp Error Budget Calculator

Analog Filter Wizard

Analog Filter Wizard

SPICE Model 1

Simulation Model

Latest Discussions

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AD8021

Features

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Documentation

Tutorial 12

Product Selection Guide 2

3rd Party Solutions 1

Rarely Asked Question Page 4

Analog Dialogue 4

Webcast 2

Jan 5, 2015

May 15, 2012

Software & Part Ecosystem

Evaluation Kits 1

EVAL-HSAMP-1

EVAL-HSAMP-1

Features and Benefits

Evaluation Kits1

EVAL-HSAMP-1

Tools & Simulations 7

Precision ADC Driver Tool

Analog Photodiode Wizard

VRMS/dBm/dBu/dBV calculators

Power Dissipation vs Die Temp

OpAmp Error Budget Calculator

Analog Filter Wizard

SPICE Model 1

Latest Discussions

Recently Viewed