**SSM2135S-REEL7: A High-Performance Audio Op Amp for Premium Portable Applications**

In the competitive landscape of portable audio, from high-end digital audio players (DAPs) and smartphones to professional field recorders, the pursuit of pristine sound quality is relentless. The **SSM2135S-REEL7** from Analog Devices stands out as a monolithic dual operational amplifier engineered specifically to meet the demanding performance and power constraints of these premium portable applications. It masterfully balances **exceptional audio fidelity** with remarkably low power consumption, making it a cornerstone component for designers aiming to elevate the user experience.

The core of the SSM2135S-REEL7's appeal lies in its superior technical specifications. It delivers a wide bandwidth of 8 MHz and a very fast slew rate of 4.5 V/µs, ensuring that complex audio signals are reproduced with accuracy and minimal dynamic intermodulation distortion. More critically, it boasts an ultralow THD+N (Total Harmonic Distortion plus Noise) figure of **0.0006% at 1 kHz**, a benchmark that signifies a virtually transparent signal path. This results in cleaner, more detailed audio reproduction, allowing listeners to hear the nuances in their music without the coloration introduced by lesser op-amps.

Power efficiency is paramount in battery-operated devices. The SSM2135S-REEL7 addresses this with a **quiescent current of only 1 mA per amplifier**, significantly extending battery life without compromising on performance. Furthermore, it operates flawlessly from a wide supply range of ±2.5 V to ±18 V, offering designers flexibility across various system architectures. Its design also incorporates **superior power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR)**, which effectively minimizes noise and interference from other digital components on the board, a common challenge in densely packed portable electronics.

The device is offered in the compact SOIC package and the "-REEL7" suffix indicates it is supplied on a 7-inch reel, making it perfectly suited for automated, high-volume surface-mount assembly lines. This combination of a small footprint and industry-standard packaging streamlines the manufacturing process for mass-market consumer products.

**ICGOOFind**: The SSM2135S-REEL7 is an optimal solution for designers seeking to implement **high-fidelity audio** in power-sensitive portable designs, offering an unmatched blend of **ultralow distortion**, **low noise**, and **remarkable power efficiency**.

**Keywords**: Audio Operational Amplifier, Low Distortion, Low Power Consumption, Portable Audio, High-Fidelity