ADA4622-2ARMZ-R7

Overview

The ADA4622-2ARMZ-R7 is a dual-channel, precision operational amplifier from Analog Devices Inc., featuring JFET inputs and rail-to-rail output. It operates on a supply voltage range of 5 V to 30 V (±2.5 V to ±15 V) with an operating temperature range of -40°C to +125°C. Key electrical parameters include a typical gain bandwidth product of 8 MHz, a slew rate of 23 V/µs, and a maximum input bias current of 10 pA at 25°C. The device offers B-grade offset voltage specifications of ±0.35 mV maximum at 25°C and ±0.8 mV over the full temperature range.

Feature Summary

• Next-generation upgrade to AD822 with improved DC precision, lower noise, and higher speed while maintaining industry-standard pinouts.
• JFET input stage providing extremely low input bias current and high input impedance for minimal signal loading.
• Rail-to-rail output capability allows the output voltage to swing close to both supply rails, maximizing dynamic range in single-supply applications.
• Integrated electromagnetic interference (EMI) rejection filters enhance signal robustness against switching noise sources.

Applications

• High output impedance sensor interfaces
• Photodiode sensor interfaces
• Transimpedance amplifiers
• ADC drivers
• Precision filters and signal conditioning

Procurement Notes

Verify the specific grade (B grade) and package type (MSOP-8) when ordering. Confirm that the suffix '-R7' indicates tape and reel packaging as required by your assembly process. Ensure compatibility with your PCB footprint for the 8-lead Mini Small Outline Package. Cross-reference the datasheet revision F specifications for accurate performance expectations.

Selection Notes

Select this component when upgrading from the AD822 to benefit from reduced offset voltage drift and lower broadband noise without changing the board layout. It is suitable for applications requiring high slew rates and wide bandwidth alongside low bias currents. Consider the B-grade specification if tighter offset voltage matching and drift are critical for your system accuracy requirements.

Part Context

This device belongs to the ADA4622 family, which includes single (ADA4622-1), dual (ADA4622-2), and quad (ADA4622-4) channel variants. The family is designed as a direct replacement for the legacy AD820/AD822/AD824 series. The ARMZ suffix denotes the MSOP package variant within the dual-channel ADA4622-2 lineup.

Replacement Considerations

The ADA4622-2 is explicitly documented as the next generation of the AD822. It maintains identical pinouts and form factors, allowing for drop-in replacements in existing designs. Verify that the improved specifications meet or exceed the original design margins.