AD8594AR

Overview

The AD8594AR is a quad, single-supply, rail-to-rail input and output operational amplifier manufactured by Analog Devices Inc. It features a power-saving shutdown mode that reduces total supply current to less than 1 μA when all amplifiers are deactivated. The device operates within a voltage range of 2.5 V to 6 V and provides a high output drive current of ±250 mA per channel. Key electrical specifications include a gain bandwidth product of 3 MHz, a slew rate of 5 V/μs, and an input bias current as low as 5 pA. It is specified for operation over the industrial temperature range of −40°C to +85°C.

Feature Summary

• Single-supply operation with rail-to-rail input and output capabilities
• High output current drive capability of ±250 mA per channel
• Power-saving shutdown mode reducing supply current to under 1 μA
• Immunity to output phase reversal during normal operation

Applications

• Mobile communication handset audio
• PCMCIA/modem line driving
• Battery-powered instrumentation
• LCD display reference level drivers

Procurement Notes

Verify the specific package suffix against the datasheet ordering guide to ensure correct pinout compatibility. Confirm that the required operating temperature range aligns with the industrial specification limits. Ensure that external circuitry accounts for the lack of internal short-circuit protection to prevent damage during fault conditions.

Selection Notes

Select this component for applications requiring high current drive in a single-supply environment. The quad configuration allows for multiple signal paths within a compact footprint. Consider the shutdown feature for battery-operated systems where minimizing quiescent current during idle states is critical for extending operational life.

Part Context

This part belongs to the AD859x family, which includes single (AD8591) and dual (AD8592) variants. All members share identical electrical characteristics and functionality, differing only in the number of integrated amplifier channels. The quad version is designed for applications requiring four independent signal processing channels.

Replacement Considerations

Direct substitutes within the same family include the AD8591 and AD8592, provided the channel count matches the design requirements. Verify that any alternative components maintain the ±250 mA output current specification and the specific shutdown logic levels.