ADA4625-2ARDZ

Overview

The ADA4625-2ARDZ is a dual-channel, precision JFET input operational amplifier manufactured by Analog Devices Inc. It features an 8-lead SOIC package with an exposed pad (SOIC-8 EP). The device operates from single supplies of 5 V to 36 V or dual supplies of ±2.5 V to ±18 V. Key electrical specifications include a typical gain bandwidth product of 18 MHz and a high slew rate of 48 V/µs at ±18 V. It exhibits low voltage noise density of 3.3 nV/√Hz at 1 kHz and low input bias current of ±15 pA. The output stage provides rail-to-rail swing and can drive capacitive loads up to 1000 pF.

Feature Summary

• JFET input architecture providing low input bias current and high input impedance
• Rail-to-rail output capability maximizing dynamic range in single-supply applications
• High-speed performance with wide gain bandwidth and fast settling times
• Low noise characteristics suitable for precision signal conditioning

Applications

• PLL filter amplifiers
• Transimpedance amplifiers
• Photodiode sensor interfaces
• Low noise charge amplifiers

Procurement Notes

Verify the specific ordering suffix ARDZ corresponds to the standard tube packaging configuration as defined in the manufacturer's official documentation. Confirm that the exposed pad requirement is addressed in the PCB layout design for proper thermal management and electrical connection. Ensure compatibility with the specified industrial temperature range and supply voltage limits during system integration.

Selection Notes

Select this component when dual-channel precision amplification with high speed and low noise is required. The JFET input stage is optimal for high-impedance sources requiring minimal bias current loading. The rail-to-rail output allows operation from lower single-supply voltages without negative rails. Consider the 8-lead SOIC package constraints and thermal dissipation requirements associated with the exposed pad design.

Part Context

This part belongs to the ADA4625 family of high-voltage, single-supply, rail-to-rail output precision JFET operational amplifiers. The -2 suffix indicates a dual-channel configuration within this series, distinct from the single-channel ADA4625-1. These devices are designed to offer superior speed and low noise performance compared to previous generations of precision JFET op amps.

Replacement Considerations

ADA4625-1ARDZ

FAQ

Does the ADA4625-2 exhibit phase reversal if the input voltage exceeds the supply rails?

No, the device guarantees no phase reversal even when the input range exceeds either supply rail by 200 mV.

What is the maximum capacitive load the output can drive?

The output is capable of driving loads up to 1000 pF.