AD8629TRZ-EP

Overview

The AD8629TRZ-EP is a dual-channel, zero-drift operational amplifier from Analog Devices, designed for high-precision applications. It features an ultralow offset voltage of 1 µV typical and input offset drift of 0.002 µV/°C typical. The device operates on a single supply from 2.7 V to 5 V (or ±1.35 V to ±2.5 V dual supply) with a gain bandwidth product of 2.5 MHz at 5 V. It offers rail-to-rail input and output swing, low noise density of 22 nV/√Hz, and a maximum supply current of 1.0 mA per amplifier. The component is housed in an 8-lead narrow SOIC package.

Feature Summary

• Zero-drift auto-zero topology eliminates the need for external capacitors while significantly reducing digital switching noise common in chopper-stabilized amplifiers.
• Enhanced product features support defense and aerospace applications through controlled manufacturing baselines and single assembly/fabrication sites.
• Rail-to-rail input and output capabilities maximize signal-to-noise ratio and reduce input biasing complexity across the full operating temperature range.

Applications

• Pressure and position sensors
• Strain gage amplifiers
• Medical instrumentation
• Thermocouple amplifiers
• Precision current sensing

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as the datasheet lists both standard reel and tape-and-reel options for this part number. Confirm compliance with AQEC standards if the application requires defense or aerospace qualification data. Ensure the extended industrial temperature range specification aligns with the environmental constraints of the target system design.

Selection Notes

Select this component when ultra-low offset voltage and minimal drift are critical requirements over wide temperature variations. The device is suitable for systems requiring rail-to-rail performance without the complexity of external compensation components. Consider the 2.5 MHz bandwidth and 1.0 mA supply current for power-sensitive precision signal conditioning tasks.

Part Context

The AD8629-EP belongs to the AD8628/AD8629/AD8630 family of zero-drift amplifiers. This specific variant is the enhanced product version intended for rugged environments. It shares core electrical characteristics with commercial counterparts but includes stricter manufacturing controls and extended temperature ratings suitable for demanding industrial and military use cases.

Replacement Considerations

Direct pin-compatible alternatives include the MS8629. Verify that substitute devices meet the specific AQEC manufacturing baseline requirements if the original design mandates enhanced product reliability standards.

FAQ

Does the AD8629TRZ-EP require external capacitors for operation?

No, the AD8629-EP utilizes an internal auto-zero topology that does not require external capacitors.

What is the specified operating temperature range for this component?

The AD8629-EP is rated for an extended industrial temperature range of −55°C to +125°C.