ADA4000-4ARUZ

Overview

The ADA4000-4ARUZ is a quad, low-cost, precision JFET input operational amplifier manufactured by Analog Devices Inc. It features a gain bandwidth product of 5 MHz and a slew rate of 20 V/µs. The device operates on supply voltages ranging from ±4 V to ±18 V with a typical supply current of 1.35 mA per amplifier. Key electrical characteristics include a maximum offset voltage of 1.70 mV, a maximum input bias current of 40 pA, and a voltage noise density of 16 nV/√Hz at 1 kHz. It provides a common-mode rejection ratio of 100 dB and a power supply rejection ratio of 92 dB. The component is housed in a 14-lead TSSOP package.

Feature Summary

• JFET input structure providing high input impedance and very low bias current
• Unity gain stable operation with wide bandwidth and fast settling time
• Input common-mode voltage range includes the positive power supply rail

Applications

• Driving analog-to-digital converter inputs
• Buffering digital-to-analog converter outputs
• High-side signal conditioning
• Instrumentation-quality photodiode amplification
• Fast precision filters including phase-locked loop filters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and reel specifications. Ensure that the RoHS compliance status matches project requirements. Cross-reference the part number with the authorized distributor list to confirm availability and authenticity before finalizing procurement plans.

Selection Notes

Select this component for applications requiring high input impedance combined with precision DC performance. The inclusion of the positive supply rail in the common-mode voltage range makes it suitable for single-supply or high-side sensing configurations. Consider the thermal resistance values when designing for high ambient temperatures or dense PCB layouts.

Part Context

This device belongs to the ADA4000 series of precision JFET input operational amplifiers, which also includes single-channel (ADA4000-1) and dual-channel (ADA4000-2) variants. The series is designed to offer a balance of low cost, low power consumption, and high-speed performance for general-purpose signal conditioning tasks in industrial and instrumentation environments.

Replacement Considerations

Direct functional substitutes within the same family include the ADA4000-4ARZ, which utilizes a 14-lead SOIC package instead of TSSOP. Other channel counts such as the ADA4000-1 and ADA4000-2 may be used if pin count reduction is acceptable.