AD8597ARZ

Overview

The AD8597ARZ is a single-channel, ultralow noise, and low distortion operational amplifier manufactured by Analog Devices Inc. It features a voltage noise density of 1.07 nV/√Hz at 1 kHz and total harmonic distortion of −120 dB at 1 kHz. The device offers a gain bandwidth product of 10 MHz and a slew rate of 14 V/μs to 16 V/μs depending on supply conditions. It operates with a typical supply current of 4.8 mA per amplifier and supports supply voltages up to ±18 V. The input offset voltage is typically 10 μV, with a common-mode rejection ratio of 135 dB. It is housed in an 8-lead SOIC package and functions over a temperature range of −40°C to +125°C.

Feature Summary

• Ultralow voltage noise density of 1.1 nV/√Hz for high-fidelity signal amplification
• Low harmonic distortion of −120 dB THD at audio frequencies
• Wide dynamic range suitable for precision preamplifier applications
• High slew rate and gain bandwidth for fast settling times

Applications

• Professional audio preamplifiers
• Medical and physiological measurements
• Precision data conversion buffering
• Imaging systems
• ATE and precision testers

Procurement Notes

Verify the specific package variant (SOIC or LFCSP) against design requirements, as the AD8597 series includes multiple packaging options. Confirm that the operating environment stays within the specified −40°C to +125°C range. Ensure power sequencing applies supplies simultaneously before input signals are introduced to prevent damage. Check input voltage limits to avoid forward-biasing ESD protection diodes.

Selection Notes

Select this component when source impedance is kept below 1 kΩ to leverage its ultralow voltage noise characteristics. Consider the AD8599 if dual-channel functionality is required instead of a single channel. Evaluate the trade-off between adding series resistors for input protection and the resulting increase in thermal noise. Verify that the 10 MHz bandwidth meets the frequency requirements of the target application.

Part Context

The AD8597 belongs to a family of low-noise operational amplifiers from Analog Devices, designed specifically for applications demanding high dynamic range and minimal signal degradation. It shares architectural similarities with other members like the AD797 but is optimized for lower distortion at audio bandwidths. The device is part of a broader portfolio including dual and quad variants such as the AD8599.

Replacement Considerations

Public confirmed substitute part numbers: None identified.