AD8631ARTZ

Overview

The UMW AD8631ARTZ is a single-channel, low-noise, micro-power CMOS operational amplifier. It operates on a single supply of +2.3V to +5.5V or dual supplies of ±1.15V to ±2.25V. The device features a gain-bandwidth product of 6.5MHz and a slew rate of 4V/μs. Quiescent current is 480μA per amplifier at 5V. Input offset voltage is typically ±0.8mV with a maximum of 4.2mV. It offers rail-to-rail input and output swing, high open-loop gain of 103dB, and operates over an extended industrial temperature range of −40℃ to +125℃.

Feature Summary

• Rail-to-rail input and output capability with common-mode voltage extending beyond supply rails
• Low noise performance with 20nV/√Hz density at 10kHz
• High open-loop gain of 103dB suitable for active filters and precision gain stages
• Unit-gain stable design optimized for low voltage and low power applications

Applications

• Photodiode amplification circuits
• Sensor interface conditioning
• Audio output buffering
• Active filter implementations
• Driving analog-to-digital converters

Procurement Notes

Verify the package marking matches SOT-23-5 specifications. Confirm the ordering code suffix ARTZ corresponds to tape and reel delivery mode as documented in the manufacturer's ordering information. Ensure the component meets RoHS compliance standards required for the target assembly process.

Selection Notes

Select this component when designing battery-powered instrumentation requiring low quiescent current. It is appropriate for portable equipment where space-saving packaging is critical. Choose this part if the application demands rail-to-rail signal handling with minimal distortion and high bandwidth relative to its power consumption profile.

Part Context

This device belongs to the AD863xA family of operational amplifiers manufactured by UMT (UMW). The family includes single (AD8631), dual (AD8632), and quad (AD8634) variants. The AD8631ARTZ specifically denotes the single-channel version housed in a surface-mount SOT-23-5 package, designed for integration into compact electronic systems.

Replacement Considerations

Compatible substitutes within the same family include the AD8632A and AD8634A, which share identical electrical characteristics but offer different channel counts. Verify pin compatibility when replacing dual or quad versions with the single-channel AD8631ARTZ.

FAQ

What is the input common-mode voltage range?

The input common-mode voltage range extends from VS− − 0.1V to VS+ + 0.1V, allowing true ground sensing.

How does the device handle capacitive loads?

The amplifier can directly drive 1nF in unity-gain without oscillation. For heavier capacitive loads, an isolation resistor should be used between the output and the load to maintain stability.