AD8538ARZ-REEL7

Overview

The AD8538ARZ-REEL7 is a single-channel, low power, precision auto-zero operational amplifier manufactured by Analog Devices. It operates on a single supply voltage ranging from 2.7 V to 5.5 V. Key electrical specifications include a maximum input offset voltage of 13 µV and an input bias current of 25 pA at 25°C. The device features a gain-bandwidth product of 430 kHz and a typical supply current of 180 µA per amplifier. It is housed in an 8-lead narrow body SOIC package (R-8) and is qualified for operation within the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Auto-zero architecture ensures extremely low offset voltage and drift over temperature.
• Single-supply operation optimized for battery-powered and portable applications.
• High common-mode rejection ratio and power supply rejection ratio for signal integrity.

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the 8-lead SOIC_N package configuration as documented in the manufacturer's ordering guide. Confirm RoHS compliance status via the Z suffix designation. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity and traceability for automotive or industrial grade requirements.

Selection Notes

Select this component when high DC precision is required with minimal power consumption. The auto-zero technology eliminates the need for external chopper stabilization circuits. Consider the 8-lead SOIC package for standard surface-mount assembly processes. Evaluate the 430 kHz bandwidth against system frequency requirements to ensure adequate phase margin and settling time for the intended application load.

Part Context

This part belongs to the AD8538/AD8539 family of low power, precision amplifiers. The AD8538 variant provides a single amplifier channel, whereas the AD8539 offers dual channels. Both share identical core performance characteristics regarding offset voltage, bias current, and power consumption, differing primarily in channel count and physical pinout configurations across available packages.

Replacement Considerations

Direct functional substitutes within the same package are not explicitly listed in the provided documentation. Designers should consult the manufacturer's ordering guide for alternative package options such as TSOT-23 or MSOP variants, or verify cross-reference compatibility with other auto-zero amplifier families ensuring matching offset and bias specifications.