AD8631

Obsolete

1.8 V, 5 MHz Rail-to-Rail Low Power Operational Amplifiers

Data Sheet (Rev. 0) Product Selection Table

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Overview

The AD8631 brings precision and bandwidth to the SOT-23-5 package at single supply voltages as low as 1.8 V and low supply current. The small package makes it possible to place the AD8631 next to sensors, reducing external noise pickup.

The AD8631 and AD8632 are rail-to-rail input and output bipolar amplifiers with a gain bandwidth of 4 MHz and typical voltage offset of 0.8 mV from a 1.8 V supply. The low supply current and the low supply voltage makes these parts ideal for battery-powered applications. The 3 V/µs slew rate makes the AD8631/AD8632 a good match for driving ASIC inputs, such as voice codecs.

The AD8631/AD8632 is specified over the extended industrial (–40.C to +125.C) temperature range. The AD8631 single is available in 5-lead SOT-23 surface-mount packages. The dual AD8632 is available in 8-lead SOIC and µSOIC packages.

Suggested Replacement Parts

Precision 20 MHz CMOS Single RRIO Operational Amplifier

Documentation

Data Sheet 1

AD8631/AD8632: 1.8 V, 5 MHz Rail-to-Rail Low Power Operational Amplifiers Data Sheet (Rev.0) 04/28/2000

Application Note 3

AN-106: A Collection of Amp Applications 02/14/2015

AN-357: Operational Integrators 02/14/2015

AN-106F: Instrumentation Circuitry Using RMS-to-DC Converters 10/28/2020

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

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

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.