AD8574TRUZ-EP

Overview

The AD8574TRUZ-EP is a quad zero-drift operational amplifier from Analog Devices, designed for military and aerospace environments. It features rail-to-rail input and output swings with single-supply operation between 2.7 V and 5 V. The device utilizes a patented spread spectrum auto-zero technique to eliminate intermodulation distortion. Key electrical characteristics include a maximum offset voltage of 1 μV at 25°C and 15 μV across the temperature range, an offset drift of 0.005 μV/°C, and an ultralow input bias current of 10 pA typical. It offers high gain (145 dB typical), CMRR (140 dB typical), and PSRR (130 dB typical). The amplifier operates within a military temperature range of −55°C to +125°C and is housed in a 14-lead TSSOP package.

Feature Summary

• Patented spread spectrum auto-zero technology eliminates intermodulation effects from chopping function interaction with signal frequencies.
• Enhanced product construction supports defense and aerospace applications under AQEC standards with controlled manufacturing baselines.
• Rail-to-rail input and output swing capability ensures maximum dynamic range on single supplies.
• Ultralow offset voltage and drift specifications minimize error sources in precision measurement circuits.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required tape-and-reel configuration, as the base part number may be available in tube packaging. Confirm RoHS compliance status indicated by the Z suffix if environmental regulations apply. Ensure the procurement channel provides access to the Enhanced Product qualification data and change notification protocols required for defense and aerospace projects.

Selection Notes

Select this component when designing systems requiring ultra-low DC errors and stability over wide temperature variations. The quad configuration reduces board space compared to using multiple single-channel amplifiers. Consider the 1 MHz gain bandwidth product and slew rate limitations when evaluating AC performance requirements. Verify that the supply voltage range aligns with the system's power architecture.

Part Context

This device belongs to the AD8574-EP family of enhanced product amplifiers manufactured by Analog Devices. It shares architectural similarities with the commercial AD8574 but adheres to stricter quality controls for military use. The EP designation indicates adherence to the Analog Devices Quality Enhancement Control (AQEC) standard, ensuring consistent fabrication and assembly at designated sites.

Replacement Considerations

The AD8574TRU-EP is a direct pin-compatible alternative to the AD8574TRUZ-EP, differing only in RoHS compliance packaging details. Designers should verify that any substitute maintains the same military temperature rating and enhanced product reliability standards.

FAQ

How does the AD8574-EP handle intermodulation distortion?

It uses a patented spread spectrum auto-zero technique that eliminates intermodulation effects caused by the interaction of the chopping function with the signal frequency.

What is the guaranteed operating temperature range?

The device is specified for the military temperature range of −55°C to +125°C.

Does the amplifier require external capacitors for stability?

No external capacitors are required for basic operation, though load capacitance limits apply for transient response stability.