ADA4622-2ARZ-RL

Overview

The ADA4622-2ARZ-RL is a dual-channel precision operational amplifier from Analog Devices, serving as the next-generation successor to the AD822. It features JFET inputs with rail-to-rail output capability and operates on single or dual supplies ranging from 5 V to 30 V. Key electrical specifications include an 8 MHz gain bandwidth product, a 20 V/µs slew rate, and low input bias current of ±10 pA maximum at 25°C. The device offers B-grade offset voltage of ±0.35 mV and drift of ±2 µV/°C. It provides high electromagnetic interference rejection (90 dB) and is housed in an 8-lead SOIC package.

Feature Summary

• Next-generation upgrade for legacy AD822 devices with improved DC precision and noise performance
• Rail-to-rail output swing with input common-mode range including the negative supply rail
• High electromagnetic interference rejection ratio (EMIRR) for robust signal integrity
• Low input bias current and low offset voltage drift for high-accuracy applications

Applications

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

Procurement Notes

Verify the specific grade (B-grade) and package variant (SOIC-8) against the datasheet requirements. Confirm that the reel packaging matches the system's pick-and-place capabilities. Ensure the operating temperature range of -40°C to +125°C aligns with the final application environment. Cross-reference the pinout configuration to guarantee compatibility with existing PCB footprints designed for the AD822 series.

Selection Notes

Select this component when upgrading from AD822 designs requiring higher bandwidth and lower noise without changing the footprint. It is suitable for single-supply systems needing rail-to-rail output. Consider the B-grade offset specifications if tight DC accuracy is required. Verify that the 20 mA output drive current meets the load requirements. Evaluate the EMI rejection benefits if the circuit operates near switching noise sources.

Part Context

This part belongs to the ADA4622-1/ADA4622-2/ADA4622-4 family of precision JFET input op amps. It shares the same industry-standard pinouts as the legacy AD820/AD822/AD824 series, facilitating direct pin-for-pin replacements. The family covers single, dual, and quad configurations, all featuring similar core improvements in speed, noise, and DC precision over the original generation.

Replacement Considerations

The ADA4622-2 is the direct next-generation replacement for the AD822. It maintains identical pinouts and package options, allowing for drop-in upgrades. Designers should verify that the improved slew rate and bandwidth do not require compensation adjustments in existing feedback networks.