AD8221AR-REEL

Instrumentation, Op Amps, Buffer Amps Overview

The AD8221AR-REEL is a precision instrumentation amplifier from Analog Devices, packaged in an 8-lead SOIC with reel packaging. It features a gain range of 1 to 1000 V/V set by one external resistor. Key electrical parameters include an 825 kHz bandwidth at G=1, 2 V/µs slew rate, and 8 nV/√Hz input voltage noise. The device operates on supplies from ±2.3 V to ±18 V with a quiescent current of 1 mA. It maintains high CMRR (80 dB min to 10 kHz) and low offset voltage (70 µV max).

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Programmable gain via single external resistor
• High common-mode rejection ratio over frequency
• Low noise and low offset voltage performance
• Wide supply voltage operating range

Instrumentation, Op Amps, Buffer Amps Applications

• Precision data acquisition systems
• Bridge amplifiers for strain gages
• Medical instrumentation
• Industrial process controls

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the AR grade specifications against project requirements, specifically noting the 70 µV maximum input offset voltage compared to the BR grade's 25 µV. Confirm the reel packaging format matches automated assembly needs. Ensure the MSOP or SOIC package selection aligns with board space constraints, as the datasheet highlights MSOP for space-saving applications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high CMRR stability across frequencies is critical, as it rejects wideband interference better than typical amplifiers falling off at 200 Hz. Consider the AR grade for cost-sensitive designs where higher offset voltage is acceptable. Evaluate the need for external gain setting resistors and ensure source impedance matching to maintain specified CMRR performance.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD8221 series includes variants like AD8221ARM (MSOP), AD8221ARZ (SOIC, RoHS), and AD8221BRZ (higher precision). The AD8221AR-REEL specifically denotes the standard AR grade in SOIC-8 tape and reel format. It shares the core monolithic 3-op amp topology with superbeta input transistors found across the family.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers: AD8221AR, AD8221ARZ, AD8221ARM, AD8221BRZ.