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AD8031/AD8032: 2.7V, 800 μA, 80 MHz Rail-to-Rail I/O Amplifiers Data Sheet (Rev. G)9/28/2006PDF423 kB
Alternative Parts
Overview
Features and Benefits
- Low power
Supply current 800 µA/amplifier
Fully specified at +2.7 V, +5 V and ±5 V supplies - High speed and fast settling on 5 V
80 MHz, –3 dB bandwidth (G = +1)
30 V/µs slew rate
125 ns settling time to 0.1% - Output current: 15 mA
- High grade option
VOS (maximum) = 1.5 mV - Rail-to-rail input and output
No phase reversal with input
0.5 V beyond supplies
Input CMVR extends beyond rails by 200 mV
Output swing to within 20 mV of either rail - Low distortion
–62 dB @ 1 MHz, VO = 2 V p-p
–86 dB @ 100 kHz, VO = 4.6 V p-p
Product Details
The AD8031 (single) is a single supply voltage feedback amplifier that features high speed performance with 80 MHz of small signal bandwidth, 30 V/µs slew rate and 125 ns settling time. This performance is possible while consuming less than 4.0 mW of power from a single +5 V supply. This feature increases the operation time of high speed, battery-powered systems without compromising dynamic performance.
The AD8031 has true single supply capability with rail-to-rail input and output characteristics and is specified for +2.7 V, +5 V, and ±5 V supplies. The input voltage range can extend to 500 mV beyond each rail. The output voltage swings to within 20 mV of each rail providing the maximum output dynamic range.
The AD8031 also offers excellent signal quality for only 800 µA of supply current per amplifier; THD is -62 dBc with a 2 V p-p, 1 MHz output signal, and -86 dBc for a 100 kHz, 4.6 V p-p signal on +5 V supply. The low distortion and fast settling time make it ideal as a buffer to single supply ADCs.
Operating on supplies from +2.7 V to +12 V and dual supplies up to ±6 V, the AD8031 is ideal for a wide range of applications, from battery operated systems with large bandwidth requirements to high speed systems where component density requires lower power dissipation. The AD8031 is available in 8-lead PDIP, 8-lead SOIC_N and 5-lead SOT-23 packages and operates over the industrial temperature range of -40°C to +85°C.
AD8032 - Dual Amplifier
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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Understanding PulSAR ADC Support Circuitry7/30/2020
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AN-1575: Single-Ended to Differential High Speed Drive Circuit for the AD7626 16-Bit, 10 MSPS ADC (Rev. A)1/14/2019PDF319 K
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AN-253: Find Op Amp Noise with Spreadsheet2/14/2015PDF77 kB
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AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps2/14/2015PDF55 kB
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AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)2/14/2015PDF166 kB
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AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications2/14/2015PDF538 kB
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AN-257: Careful Design Tames High Speed Op Amps2/14/2015PDF611 kB
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AN-358: Noise and Operational Amplifier Circuits2/14/2015PDF593 kB
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AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems10/1/1996
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User Guide: ADMX1002, Ultra-low Distortion and Low Noise Signal Generator4/16/2021WIKI
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UG-838: Evaluation Board for Single, High Speed Op Amps Offered in 5-Lead SOT-23 and 6-Lead SOT-23 Packages10/15/2015PDF184K
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UG-755: 8-Lead SOIC Amplifier Evaluation Board User Guide (Rev. A)4/14/2015PDF248 K
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MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR2/14/2015PDF104 kB
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MT-052: Op Amp Noise Figure: Don't Be Misled2/14/2015PDF60 kB
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MT-050: Op Amp Total Output Noise Calculations for Second-Order System2/14/2015PDF38 kB
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MT-049: Op Amp Total Output Noise Calculations for Single-Pole System2/14/2015PDF40 kB
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MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth2/14/2015PDF81 kB
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MT-047: Op Amp Noise2/14/2015PDF72 kB
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MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps2/14/2015PDF62 kB
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MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters2/14/2015PDF69 kB
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MT-033: Voltage Feedback Op Amp Gain and Bandwidth2/14/2015PDF251 kB
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MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps2/14/2015PDF66 kB
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MT-056: High Speed Voltage Feedback Op Amps2/3/2009PDF109 kB
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MT-032: Ideal Voltage Feedback (VFB) Op Amp12/11/2008PDF65 kB
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
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High Speed Amplifiers Selection Table2/27/2008PDF77 kB
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CN0277: High-Precision, 18-Bit, 5 MSPS, Low Power Data Acquisition Signal-Chain12/30/2013PDF220 kB
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CN-0255: A Complete Single-Supply, 16-Bit, 100 kSPS PulSAR ADC System Dissipates 8 mW12/30/2013PDF325 kB
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CN0247: 12-Bit ,1 MSPS, Single-Supply, Low Power Data Acquisition System12/29/2013PDF228 kB
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CN0201: Complete 5 V, Single-Supply, 8-Channel Multiplexed Data Acquisition System with PGIA for Industrial Signal Levels5/1/2013PDF263 kB
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A 16-Bit, 6 MSPS SAR ADC System with Low Power Input Drivers and Reference Optimized for Multiplexed Applications11/5/2012PDF487K
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CN-0105: Single-Ended-to-Differential High Speed Drive Circuit for 16-Bit, 10 MSPS AD7626 ADC11/9/2010PDF382 kB
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Selecting an ADC driver to achieve optimized signal chain performance7/13/2015
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Increase Dynamic Range of SAR ADCs Using Oversampling6/1/2015
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Demystifying High-Performance Multiplexed Data-Acquisition Systems7/1/2014 Analog Dialogue
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High-Performance Data-Acquisition System Enhances Images for Digital X-Ray and MRI10/1/2013 Analog Dialogue
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Voltage Reference Design for Precision Successive-Approximation ADCs6/1/2013 Analog Dialogue
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Making Batteries Last Longer with Fast, High-Precision SAR Analog-to-Digital-Converters9/1/2012 Analog Dialogue
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Amplifier Input Protection... Friend or Foe?5/1/2007 Analog Dialogue
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Linear Potentiometer Provides Nonlinear Light-intensity Control4/28/2005
Tools & Simulations
LTspice
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.

Models for the following parts are available in LTspice:
SPICE Models
Design Tools
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.
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.
A utility to convert between standard units of power measurement and signal strength.
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
Reference Designs (5)
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
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AD8031ANZ | Material Declaration | Reliability Data | 8-Lead PDIP | |
AD8031ARTZ-R2 | Material Declaration | Reliability Data | 5-Lead SOT-23 | |
AD8031ARTZ-REEL7 | Material Declaration | Reliability Data | 5-Lead SOT-23 | |
AD8031ARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
AD8031ARZ-REEL | Material Declaration | Reliability Data | 8-Lead SOIC | |
AD8031ARZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
AD8031BNZ | Material Declaration | Reliability Data | 8-Lead PDIP | |
AD8031BRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
AD8031BRZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD8031 Discussions
Sample & Buy
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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.