AD8021ARM-REEL

Instrumentation, Op Amps, Buffer Amps Overview

The AD8021ARM-REEL is a low noise, high-speed voltage feedback operational amplifier manufactured by Analog Devices Inc. It features a typical quiescent supply current of 7 mA at ±5 V and supports a wide supply range from ±2.25 V to ±12 V. The device offers a small signal bandwidth up to 490 MHz at G = +1 and a slew rate of 120 V/μs. Key electrical parameters include an input offset voltage of 1 mV maximum, input bias current of 10.5 μA, and input voltage noise density of 2.1 nV/√Hz. It is housed in an 8-lead MSOP package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Custom compensation allows users to select gain bandwidth product with a single external capacitor for gains between -1 and -10.
• Features an output disable pin that reduces quiescent supply current significantly when inactive.
• Designed for low power operation while maintaining high speed and low noise performance suitable for 16-bit systems.

Instrumentation, Op Amps, Buffer Amps Applications

• ADC preamps and drivers
• Instrumentation preamps
• Active filters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix REEL against the manufacturer's official documentation to confirm packaging format and reel specifications. Ensure the component matches the required industrial temperature range and package type (MSOP-8) for your design. Cross-reference the datasheet revision to confirm all electrical characteristics align with your system requirements before finalizing procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when designing circuits requiring both high speed and low noise within a compact surface-mount package. The customizable compensation feature makes it suitable for applications needing specific bandwidth-to-gain ratios. Consider the output disable functionality if power management during idle states is critical for the application.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD8021 is part of Analog Devices' portfolio of high-speed operational amplifiers designed for precision applications. It is specifically engineered to perform well in 16-bit resolution systems, balancing low power consumption with high dynamic performance. The ARM variant denotes the MSOP-8 package option available for space-constrained designs.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Check for direct substitutes within the AD8021 series or other Analog Devices high-speed op amps with similar compensation capabilities. Verify pin compatibility and electrical specifications such as bandwidth, noise, and supply voltage ranges before substituting.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the AD8021 handle frequency compensation?

The AD8021 uses custom compensation where the user can add an external capacitor to the CCOMP pin to set the desired gain bandwidth product for closed-loop gains between -1 and -10.

What is the purpose of the DISABLE pin?

The DISABLE pin allows the user to reduce the quiescent supply current of the amplifier when it is not in use, providing additional power savings.