ADA4001-2ARZ

Overview

The ADA4001-2ARZ is a dual-channel JFET operational amplifier in an 8-lead SOIC package. It features a supply voltage range of ±5 V to ±18 V and operates from -40°C to +125°C. Key electrical parameters include a typical input bias current of 20 pA, a gain bandwidth product of 16.7 MHz, and a slew rate of ±25 V/µs. The device offers rail-to-rail output capability, unity-gain stability, and low noise characteristics with 7.7 nV/√Hz at 1 kHz.

Feature Summary

• Rail-to-rail output stage enables full signal swing across the supply range.
• JFET input architecture provides extremely low input bias current and noise.
• Maintains fast settling performance even when driving substantial capacitive loads.
• Eliminates output phase reversal when input voltages exceed the common-mode range.

Applications

• High impedance sensor amplification
• Medical instruments
• Photodiode amplifiers
• Precision current measurement

Procurement Notes

Verify the specific ordering suffix (e.g., ARZ, ARZ-R7) against the required packaging format. Confirm RoHS compliance status as indicated by the Z suffix. Ensure the selected variant matches the required temperature range and pin configuration for the target PCB layout.

Selection Notes

Select this component for applications requiring high input impedance combined with low noise and wide dynamic range. The rail-to-rail output is suitable for single-supply or dual-supply systems where maximizing signal swing is critical. Verify that the load capacitance requirements are met without external compensation.

Part Context

This part belongs to the ADA4001 family of low noise, low input bias current, rail-to-rail output JFET dual operational amplifiers manufactured by Analog Devices Inc. The series includes variants optimized for different packaging and reel configurations while maintaining identical electrical specifications.

Replacement Considerations

ADA4001-2ARZ-R7

FAQ

Does the ADA4001-2 suffer from output phase reversal?

No, unlike many older JFET amplifiers, the ADA4001-2 does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.

What is the typical input bias current?

The typical input bias current is 20 pA at a supply voltage of ±15 V.