ADA4627-1BRZ

Overview

The ADA4627-1BRZ-R7 is a single-channel JFET operational amplifier manufactured by Analog Devices Inc. It features a gain bandwidth product of 19 MHz and a slew rate of 82 V/µs to 84 V/µs. The device operates on dual supplies ranging from ±5 V to ±15 V, with an absolute maximum supply voltage of 30 V. Key electrical specifications include a maximum input offset voltage of 200 µV (B grade) or 300 µV (A grade), a typical drift of 1 µV/°C, and a maximum input bias current of 5 pA. Voltage noise density is 6.1 nV/√Hz at 1 kHz, with peak-to-peak noise of 0.7 µV to 1.6 µV in the 0.1 Hz to 10 Hz range. Supply current is approximately 7 mA per amplifier.

Feature Summary

• Combines high-speed AC performance with precision DC characteristics for low-noise applications
• Features very low input bias current due to JFET input stage
• Includes offset adjust pins in SOIC package for compatibility with existing designs
• Operates without output phase reversal when inputs exceed common-mode range

Applications

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

Procurement Notes

Verify component authenticity through authorized channels as counterfeit components exist. Confirm the specific grade (A or B) required for your application's offset voltage tolerance. Check datasheet revisions for updates to electrical characteristics. Ensure proper handling procedures are followed due to ESD sensitivity. Validate that the ordering suffix matches the required packaging format.

Selection Notes

Select this component for applications requiring both high speed and low noise. The ADA4627-1 is unity-gain stable, unlike the decompensated ADA4637-1 which requires a noise gain of 5 or greater. Consider the SOIC package's offset adjust pins if design compatibility is needed. Evaluate PCB layout requirements carefully to minimize leakage currents given the ultra-low bias current specification.

Part Context

The ADA4627-1 belongs to Analog Devices' series of wide bandwidth precision amplifiers. It is designed to bridge the gap between standard precision op amps and high-speed devices. The part is available in 8-lead SOIC and LFCSP packages. It shares architectural similarities with the ADA4637-1 but offers full frequency compensation for stability at unity gain.

Replacement Considerations

Public confirmed substitute part numbers: LT1354CS8, LT1354IS8.