ADA4627-1ARZ-R7

Overview

The ADA4627-1ARZ-R7 is a single-channel, high-speed JFET operational amplifier manufactured by Analog Devices Inc. It operates on dual supplies ranging from ±5 V to ±15 V (10 V to 30 V total). Key electrical parameters include a gain-bandwidth product of 19 MHz, a slew rate of 84 V/µs, and a maximum input offset voltage of 200 µV. The device features very low input bias current of 5 pA, 116 dB typical CMRR, and 112 dB typical PSRR. It is housed in an 8-lead SOIC package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Combines precision DC characteristics with high-speed AC performance for wide bandwidth applications.
• Features extremely low input bias current and low noise density suitable for high-impedance sensor interfaces.
• Designed with robust protection against output phase reversal when inputs exceed the common-mode range.
• Includes offset adjust pins in the SOIC package to facilitate zeroing in sensitive measurement circuits.

Applications

• Photodiode amplifiers
• High impedance sensors
• Precision instrumentation
• Phase-locked loop filters

Procurement Notes

Verify component authenticity through authorized channels as this part number may be subject to obsolescence or limited availability. Confirm that the specific ordering suffix matches the required reel packaging format. Ensure the procurement documentation explicitly states the grade (B or A) and temperature range specifications to guarantee compliance with design requirements.

Selection Notes

Select this component when both high slew rates and ultra-low offset voltages are required simultaneously. It serves as a direct replacement for legacy parts requiring similar JFET input characteristics but with improved speed. Consider the 8-lead SOIC footprint constraints and ensure PCB layout includes guard rings to minimize leakage currents associated with the low bias current specification.

Part Context

This device belongs to the ADA4627/ADA4637 series of wide bandwidth precision amplifiers. While the ADA4637-1 is a decompensated variant stable only at gains of five or greater, the ADA4627-1 is unity-gain stable. Both share identical pinouts and core architecture, differing primarily in internal compensation to optimize bandwidth versus stability trade-offs.

Replacement Considerations

Public confirmed substitute part numbers: LT1354CS8, LT1354IS8#TR.

FAQ

Does the ADA4627-1 experience output phase reversal?

No, the ADA4627-1 is designed to prevent output phase reversal even if the input common-mode voltage exceeds the supply rails slightly.

What is the recommended method for offset nulling?

While the SOIC package has offset adjust pins, it is generally not recommended due to increased drift; instead, use an auto-zero amplifier in a composite configuration or add a potentiometer in an inverting stage.