ADA4622-4ARZ

Overview

The ADA4622-4ARZ is a quad-channel, precision operational amplifier from Analog Devices Inc., featuring JFET inputs and rail-to-rail output. It operates on a single supply of 5 V to 30 V or dual supplies of ±2.5 V to ±18 V. Key electrical parameters include an 8 MHz gain bandwidth product, 23 V/µs typical slew rate, and low input bias current of ±10 pA maximum at 25°C. The device offers A grade offset voltage of ±0.8 mV and B grade of ±0.35 mV at 25°C. It functions within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Next-generation upgrade for AD820/AD822/AD824 with improved DC precision and lower noise
• Rail-to-rail output capability with input voltage range including the negative supply
• Integrated electromagnetic interference (EMI) rejection filters for robust signal integrity
• High output drive strength enabling direct driving of SAR ADC inputs

Applications

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

Procurement Notes

Verify the specific package type and grade (A or B) required for your design, as the base part number may correspond to different pin configurations or performance tiers. Confirm that the ordering suffix matches the desired thermal package and tape/reel specifications. Cross-reference the datasheet revision to ensure all electrical characteristics align with your system requirements before finalizing procurement.

Selection Notes

Select this component when high precision and low bias current are critical in single-supply applications. The quad configuration reduces board space compared to individual op amps. Consider the A or B grade based on offset voltage and drift requirements. Ensure the load capacitance and drive requirements are within the stability limits defined in the datasheet for unity-gain configurations.

Part Context

This device belongs to the ADA4622 family, which includes single (ADA4622-1), dual (ADA4622-2), and quad (ADA4622-4) channel variants. It serves as the successor to the AD820/AD822/AD824 series, offering enhanced speed, lower noise, and better DC accuracy while maintaining compatibility with industry-standard pinouts and packages.

Replacement Considerations

Direct replacements include the legacy AD822 for dual-channel applications, though performance differences exist. For quad-channel needs, verify if the AD824 meets the specific noise and bias current requirements. Check pinout compatibility if substituting into existing designs to avoid PCB modifications.