AD8539ARMZ

Overview

The AD8539ARMZ is a dual-channel, low-power, precision auto-zero operational amplifier manufactured by Analog Devices. It features an input offset voltage of up to 16 µV and an input offset drift of 0.03 µV/°C. The device operates on single supplies from 2.7 V to 5.5 V or dual supplies from ±1.35 V to ±2.5 V, consuming approximately 210 µA per channel. Key dynamic parameters include a gain bandwidth product of 430 kHz and a slew rate of 0.4 V/µs. It provides high common-mode rejection (130 dB) and power supply rejection (125 dB). The component is housed in an 8-lead MSOP package and supports extended industrial temperatures from -40°C to +125°C.

Feature Summary

• Auto-zero architecture ensures extremely low offset voltage and minimal drift across the operating temperature range.
• Low power consumption suitable for battery-powered devices and portable instrumentation.
• High precision with high gain, high common-mode rejection ratio, and high power supply rejection ratio.
• Qualified for automotive applications with controlled manufacturing standards.

Applications

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

Procurement Notes

Verify that the specific part number matches the required package type and temperature range. Confirm RoHS compliance status if environmental regulations apply. Ensure the ordering suffix corresponds to the desired reel quantity or tape-and-reel configuration. Check for any automotive qualification requirements if the application demands it.

Selection Notes

Select this component when ultra-low offset voltage and drift are critical for signal integrity. Consider the low supply current for energy-constrained designs. Verify that the 430 kHz bandwidth meets the system's frequency response needs. Ensure the 8-lead MSOP package fits the available PCB footprint constraints.

Part Context

The AD8539ARMZ belongs to the AD8538/AD8539 family of low-power, precision auto-zero amplifiers. While the AD8538 is a single-channel version, the AD8539 integrates two identical channels in one package. Both share similar electrical characteristics but differ in pinout and channel count. The ARMZ suffix indicates the 8-lead MSOP package option.

Replacement Considerations

The AD8538 serves as the single-channel equivalent within the same family. Designers should verify pin compatibility and channel requirements before substitution. Other zero-drift amplifiers may require circuit adjustments due to differing noise profiles or bandwidth specifications.

FAQ

What is the maximum input offset voltage for the AD8539?

The maximum input offset voltage is 16 µV at 25°C and 30 µV over the extended industrial temperature range.

Does the AD8539 support rail-to-rail output?

No, the datasheet specifies output saturation voltages relative to the supply rails rather than true rail-to-rail operation.

What is the typical supply current per amplifier?

The typical supply current is 210 µA per amplifier at 5 V, with a maximum of 225 µA over the full temperature range.