AD8542ARUZ

Overview

The AD8542ARUZ is a dual-channel CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical supply current of 45 µA per amplifier. The device provides a gain-bandwidth product of approximately 1 MHz and maintains unity gain stability. Input bias current is typically 4 pA, supporting high-impedance applications. It functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Rail-to-rail input and output operation enables full signal swing in low-voltage single-supply systems.
• Very low input bias current of 4 pA facilitates use with high source impedance sensors.
• Unity-gain stable design ensures reliable performance without external compensation components.
• No phase reversal occurs during large-signal transitions near the negative supply rail.

Applications

• ASIC input or output buffering
• Piezoelectric transducer amplification
• Photodiode detection circuits
• Medical instrumentation signal conditioning

Procurement Notes

Verify that the specific part number suffix matches the required package type and RoHS compliance status. Confirm the manufacturing revision aligns with current design specifications. Ensure ESD precautions are observed during handling due to the sensitivity of CMOS input structures. Cross-reference the ordering guide for accurate packing quantities and availability options.

Selection Notes

Select this component when low power consumption is critical alongside moderate bandwidth requirements. The rail-to-rail I/O feature makes it suitable for battery-powered portable devices operating at voltages as low as 2.7 V. Consider the TSSOP package for surface-mount assembly constraints. Evaluate the 4 pA input bias current against source impedance limits to minimize offset errors in precision applications.

Part Context

This dual-channel amplifier belongs to the AD854x family, which includes single (AD8541) and quad (AD8544) variants. All members share identical electrical characteristics and pinouts within their respective channel counts. The family is designed to replace older generation amplifiers while offering significantly lower quiescent current for equivalent performance metrics.

Replacement Considerations

Direct functional replacements include AD8542ARMZ and AD8542ARZ. These parts offer identical electrical specifications but differ in package style. Verify thermal resistance values and physical footprint compatibility before substituting into existing PCB layouts.

FAQ

Does the AD8542ARUZ exhibit phase reversal?

No, the device is specifically designed to prevent phase reversal when the input common-mode voltage approaches the negative supply rail.

What is the maximum differential input voltage?

The absolute maximum rating allows a differential input voltage of ±6 V, which equals ±VS for supplies less than 6 V.