AD8604ARQZ-RL

Overview

The AD8604ARQZ-RL is a quad precision 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 750 µA per amplifier. The device offers an 8.4 MHz gain bandwidth product, a 6 V/µs slew rate, and a maximum offset voltage of 600 µV at 25°C. Input bias current is typically 0.2 pA. It is housed in a 16-lead QSOP package and supports operation across the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes DigiTrim technology for post-package trimming to achieve superior DC precision without laser trimming.
• Features true rail-to-rail architecture allowing input common-mode voltage and output swing to extend to both supply rails.
• Designed for low distortion and high speed suitable for audio and wideband applications.
• Includes no phase reversal characteristics when overdriven.

Applications

• Current sensing
• Barcode scanners
• PA controls
• Battery-powered instrumentation
• Multipole filters

Procurement Notes

Verify that the specific ordering suffix matches the required reel packaging configuration. Confirm the grade (A or D) aligns with the necessary offset voltage specifications. Ensure the QSOP package type corresponds to the target PCB footprint. Cross-reference the automotive qualification status if the application requires AEC-Q100 compliance.

Selection Notes

Select this component for designs requiring high precision combined with wide signal bandwidth in single-supply systems. The low input bias current makes it suitable for high source impedance applications such as photodiode amplification. Consider the trade-off between the A grade's tighter DC precision and the D grade's cost-effectiveness based on the specific circuit requirements.

Part Context

This part belongs to the AD860x family of precision, single-supply, rail-to-rail input/output operational amplifiers manufactured by Analog Devices Inc. The family includes single (AD8601), dual (AD8602), and quad (AD8604) variants. These amplifiers are designed to provide high performance in portable and battery-powered applications where low power consumption and wide dynamic range are critical.

Replacement Considerations

Check for pin-compatible alternatives within the same manufacturer's portfolio. Verify that any substitute maintains the rail-to-rail input/output capability and similar bandwidth specifications. Ensure the replacement package matches the 16-lead QSOP form factor.

FAQ

How does the DigiTrim technology benefit the AD8604?

DigiTrim allows for post-package trimming of the offset voltage, correcting errors caused by mechanical stresses during assembly. This results in higher precision compared to standard CMOS amplifiers without adding extra pins.

What is the behavior of the AD8604 when the input voltage exceeds the supply rails?

The device features input overvoltage protection. If the input voltage exceeds the supply rails, internal PN junctions conduct current to the supplies. This does not damage the amplifier provided the current is limited to 5 mA or less via a series resistor.