AD8574ARZ-REEL

Overview

The AD8574ARZ-REEL is a quad zero-drift operational amplifier from Analog Devices, featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.7 V to 5 V. Key electrical specifications include a maximum offset voltage of 10 μV across the temperature range, an input bias current of 1.5 nA, and a gain bandwidth product of 1.5 MHz. The device offers high open-loop gain of 145 dB typical, with common-mode rejection ratio (CMRR) of 140 dB and power supply rejection ratio (PSRR) of 130 dB. It functions within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes spread-spectrum auto-zero technology to eliminate intermodulation distortion without requiring external capacitors.
• Provides rail-to-rail input and output swing for maximum dynamic range in single-supply applications.
• Delivers ultralow offset voltage and drift characteristics suitable for precision measurement systems.
• Features extremely low input bias current to minimize loading effects on high-impedance signal sources.

Applications

• Temperature sensors
• Pressure sensors
• Precision current sensing
• Strain gage amplifiers
• Medical instrumentation

Procurement Notes

Verify the specific package suffix and reel quantity against the manufacturer's ordering guide before purchase. Confirm that the component meets RoHS compliance requirements for your region. Ensure the supplier provides valid traceability documentation. Check for any specific handling instructions related to electrostatic discharge protection during storage and assembly.

Selection Notes

Select this component when high DC precision and low noise are critical in single-supply environments. The quad configuration reduces board space compared to individual amplifiers. Consider the 1.5 MHz bandwidth for signal processing needs. Evaluate the thermal resistance if operating near the upper temperature limit. Ensure the load current requirements stay within the specified output drive capabilities.

Part Context

This part belongs to the AD857x family of zero-drift amplifiers, which includes single (AD8571), dual (AD8572), and quad (AD8574) variants. All members share similar architectural features and performance characteristics, differing primarily in channel count and package options. The family is designed to replace expensive chopper-stabilized amplifiers while maintaining high accuracy.

Replacement Considerations

Direct pin-compatible substitutes within the same family include AD8571ARZ-REEL for single-channel applications and AD8572ARZ-REEL for dual-channel configurations. Verify that alternative packages such as TSSOP or MSOP meet the mechanical constraints of the design.

FAQ

Does the AD8574 require external capacitors for its auto-zero function?

No, the AD8574 utilizes an internal spread-spectrum auto-zero technique that eliminates the need for external capacitors.

What is the maximum supply voltage for this device?

The absolute maximum supply voltage rating is 6 V, though it is guaranteed to operate between 2.7 V and 5 V.