AD8539ARZ

Overview

The AD8539ARZ is a dual low power, precision auto-zero operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V or dual supplies of ±1.35 V to ±2.5 V. The device features a maximum input offset voltage of 16 µV and an extremely low input offset drift of 0.03 µV/°C across the extended industrial temperature range of −40°C to +125°C. Key electrical specifications include a gain bandwidth product of 430 kHz, a slew rate of 0.4 V/µs, and a typical supply current of 210 µA per amplifier at 5 V. The component is housed in an 8-lead narrow body SOIC package.

Feature Summary

• Auto-zero architecture ensures high DC precision with minimal offset voltage and drift over temperature variations.
• Low power consumption design enables efficient operation in battery-powered and portable instrumentation applications.
• High common-mode rejection ratio and power supply rejection ratio maintain signal integrity under varying conditions.

Applications

• Mobile communications
• Portable instrumentation
• Battery-powered devices
• Sensor interfaces
• Temperature measurement

Procurement Notes

Verify the specific part number suffix against the manufacturer's ordering guide to confirm package type and RoHS compliance status. Ensure the selected variant matches the required automotive qualification if applicable, as commercial and automotive models may have distinct specifications. Cross-reference the datasheet revision to confirm all electrical parameters align with your design requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring high DC accuracy without external trimming. The dual-channel configuration reduces board space compared to single amplifiers. Consider the 8-lead SOIC package for standard surface-mount assembly. Evaluate the trade-off between the 430 kHz bandwidth and the ultra-low noise performance for your specific signal frequency requirements.

Part Context

The AD8539ARZ belongs to the AD8538/AD8539 family of low power, precision auto-zero op amps. While the AD8538 is a single-channel device available in TSOT-23 and SOIC packages, the AD8539 provides two channels in an 8-lead SOIC or MSOP package. Both share similar core technologies but differ in channel count and physical footprint options.

Replacement Considerations

The AD8539ARMZ serves as a pin-compatible alternative within the same family, offering identical electrical characteristics in an 8-lead MSOP package instead of the SOIC format. Designers must verify that the reduced body size of the MSOP option fits the existing PCB layout constraints.

FAQ

Does the AD8539ARZ exhibit phase reversal during overload?

No, the AD8539ARZ does not exhibit phase reversal when subjected to large differential input voltages or overload conditions.

What is the maximum input bias current specified for this device?

The maximum input bias current is 1.0 nA across the full operating temperature range of −40°C to +125°C.