AD8541ARTZ

Overview

The UMW AD8541ARTZ is a single-channel, low voltage micro power CMOS voltage feedback operational amplifier. It features a gain-bandwidth product of 1.1MHz and a slew rate of 0.8V/μs. The quiescent current is 85μA per amplifier at 5V. The maximum input offset voltage is 3.5mV with a drift of 2μV/℃. It operates from single or dual power supplies ranging from +2.3V to +5.5V. The device specifies rail-to-rail input and output capabilities. It is available in the SOT-23-5 package and is specified over an extended industrial temperature range of −40℃ to +125℃.

Feature Summary

• Rail-to-rail input and output swing capability for wide dynamic range operation
• Very low input bias current in the pA range suitable for high impedance sources
• High open-loop gain exceeding 100dB for active filter and gain stage applications
• Unit-gain stable design ensuring stability in unity-gain buffer configurations

Applications

• Smoke, gas, and environmental sensors
• Audio outputs
• Active filters and ASIC input or output amplifiers
• Sensor interfaces and portable equipment

Procurement Notes

Verify the manufacturer designation as UMW (UTD Semiconductor) rather than Analog Devices when sourcing this specific part number. Confirm the package type matches the required footprint, specifically SOT-23-5 for the ARTZ suffix. Ensure the operating environment stays within the specified -40℃ to +125℃ range. Check for RoHS compliance status if required by your assembly process. Validate that the supply voltage does not exceed the absolute maximum ratings to prevent damage.

Selection Notes

Select this component for general-purpose applications requiring optimal performance with low power consumption. It is appropriate for buffering ASICs and interfacing with piezoelectric sensors due to its ultra-low input bias current. Consider this device for battery-powered instrumentation where the 85μA quiescent current extends battery life. It is suitable for transducer interface circuits in low power systems requiring rail-to-rail signal handling.

Part Context

The AD8541ARTZ belongs to the AD854x family of low voltage micro power CMOS operational amplifiers manufactured by UMW. This family includes the single-channel AD8541, dual-channel AD8542, and quad-channel AD8544 variants. All models share similar electrical characteristics, including the 1.1MHz bandwidth and 85μA supply current. The family is designed for general-purpose use with extended industrial temperature specifications.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.

FAQ

What is the common-mode input voltage range?

The common-mode input voltage range extends from VS− − 0.2V to VS+ + 0.2V.

How does the device handle capacitive loads?

The AD8541 can directly drive 1nF in unity-gain without oscillation. For greater capacitance, an isolation resistor should be used between the output and the load.

What is the typical settling time to 0.1%?

The settling time to 0.1% with a 2V step is typically 4.5μs.