AD8656WARMZ-REEL

Overview

The AD8656WARMZ-REEL is a dual-channel, low noise, precision CMOS operational amplifier manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.7 V to 5.5 V and features rail-to-rail input and output capabilities. The device utilizes DigiTrim technology for high DC accuracy, achieving a maximum offset voltage of 250 µV over the common-mode voltage range. Key electrical specifications include a gain bandwidth product of 28 MHz, an input voltage noise density of 2.7 nV/√Hz at 10 kHz, and a typical slew rate of 11 V/µs. It is qualified for automotive applications and functions reliably across a temperature range of −40°C to +125°C.

Feature Summary

• Employs DigiTrim post-package trimming technology to correct mechanical stress-induced offset voltages, ensuring high DC precision.
• Features true rail-to-rail architecture allowing input common-mode voltage and output swing to extend to both positive and negative supply rails.
• Delivers ultralow noise performance with 2.7 nV/√Hz voltage noise density at 10 kHz and total harmonic distortion plus noise below 0.0007%.

Applications

• ADC and DAC buffers
• Audio microphone pre-amplifiers and mixing consoles
• Industrial controls and process control systems
• Precision filters and PLL filters
• Automotive collision avoidance systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and reel configuration. Confirm the 'W' designation indicates automotive qualification if required for the application environment. Ensure compatibility with the intended operating temperature range and power supply constraints before finalizing procurement.

Selection Notes

Select this component when system requirements demand high precision combined with low noise in single-supply or low-voltage environments. The rail-to-rail I/O capability makes it suitable for buffering wide dynamic range devices. Consider the automotive qualification if the deployment environment requires adherence to strict quality and reliability standards.

Part Context

This part belongs to the AD8655/AD8656 family of industry-leading low noise precision CMOS amplifiers. The AD8656 variant specifically provides two independent channels within a single package. The 'W' suffix denotes automotive qualification, while 'ARMZ' specifies the 8-lead MSOP package and RoHS compliance. The '-REEL' suffix indicates tape and reel packaging.

Replacement Considerations

The AD8655ARMZ-REEL serves as a single-channel alternative within the same family. Other precision CMOS amplifiers from Analog Devices may offer similar performance but require verification of pinout compatibility and specific electrical parameter alignment.

FAQ

Does the AD8656 exhibit phase reversal?

No, the amplifier does not exhibit phase reversal for common-mode voltages within the power supply range.

What is the purpose of DigiTrim technology in this device?

DigiTrim is a method of trimming the offset voltage after packaging to correct any offset voltages caused by mechanical stresses during assembly.