AD8657ARMZ

Overview

The AD8657ARMZ is a dual-channel micropower precision operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities, making it suitable for low-voltage applications. The device operates on a single supply voltage ranging from 2.7 V to 18 V or dual supplies of ±1.35 V to ±9 V. Key electrical specifications include a maximum offset voltage of 350 μV, a maximum input bias current of 20 pA, and a gain bandwidth product of 230 kHz. The quiescent supply current per amplifier is typically 18 μA at 25°C. It is housed in an 8-lead MSOP package.

Feature Summary

• Utilizes DigiTrim trimming technique to achieve low offset voltage and high precision.
• Offers excellent electromagnetic interference immunity across various frequencies.
• Supports rail-to-rail input and output operation for maximum dynamic range.
• Optimized for low power consumption with wide operating supply voltage range.

Applications

• Portable operating systems
• Current monitors
• 4 mA to 20 mA loop drivers
• Buffer/level shifting
• Multipole filters

Procurement Notes

Verify the specific ordering suffix and package type against the manufacturer's official documentation before procurement. Confirm that the component meets all required environmental and electrical specifications for the intended application. Ensure compatibility with existing design constraints regarding supply voltage and signal integrity.

Selection Notes

Select this component for applications requiring high precision and low power consumption within a wide voltage range. Consider its rail-to-rail I/O capability for maximizing signal swing in low-voltage systems. Evaluate the trade-off between its micropower characteristics and its gain bandwidth product for high-frequency requirements.

Part Context

The AD8657 is part of the AD8657/AD8659 family of precision micropower op amps. It is designed for process and motor control current monitoring, as well as sensor front-end buffering. The device is specified over an extended industrial temperature range from -40°C to +125°C, ensuring reliability in harsh environments.

Replacement Considerations

Consult the manufacturer's ordering guide for direct pin-compatible alternatives within the same family. Verify functional equivalence regarding offset voltage, bias current, and supply voltage ranges when considering substitutes.

FAQ

What is the typical quiescent supply current for the AD8657?

The typical quiescent supply current is 18 μA per amplifier at 25°C.

Does the AD8657 support single-supply operation?

Yes, the AD8657 supports single-supply operation from 2.7 V to 18 V.

What is the maximum input bias current specification?

The maximum input bias current is 20 pA at 25°C.