SGM8091XS/TR 350MHz, Rail-to-Rail Output CMOS Operational Amplifiers

SGMICRO SGM8091XS/TR vs. Analog Devices AD8091ARZ/AD8091ARZ-REEL7: Technical Comparison and Competitive Advantages

Product Overview:

The SGMICRO SGM8091XS/TR is a low-power, single-channel operational amplifier designed for precision signal conditioning in power-sensitive applications. It is functionally comparable to Analog Devices’ AD8091ARZ and AD8091ARZ-REEL7, which are high-speed voltage feedback op amps targeted at applications requiring wide bandwidth and fast slew rate. While ADI’s AD8091 series excels in high-speed analog systems, the SGM8091XS/TR is optimized for energy-efficient designs, delivering a superior balance of low power, low noise, and cost-efficiency for a broad range of general-purpose applications.

Power Consumption:

A standout feature of the SGM8091XS/TR is its extremely low quiescent current, operating at just 1.1mA (typical). In comparison, the AD8091ARZ requires a significantly higher 6.6mA (typical), which results in over 80% reduction in power consumption when using the SGMICRO device. This makes SGM8091XS/TR exceptionally well-suited for battery-powered, portable, and thermally-constrained systems.

AC Performance – Bandwidth and Slew Rate:

The AD8091ARZ delivers a 145MHz gain bandwidth and an impressive 1600V/μs slew rate, which are excellent for high-speed applications such as video and fast analog signal processing. In contrast, the SGM8091XS/TR features a moderate 8MHz bandwidth and a 0.3V/μs slew rate, offering adequate AC performance for many low- to mid-frequency applications while drastically reducing power draw. This trade-off enables engineers to target precision analog tasks with less noise, reduced EMI, and better power efficiency.

Noise Characteristics:

SGM8091XS/TR achieves a voltage noise density of 4nV/√Hz, which is lower than the 6nV/√Hz of the AD8091ARZ. For applications where low-frequency noise is critical—such as sensor interfaces, instrumentation, and signal monitoring—SGM8091XS/TR ensures better signal fidelity and quieter analog paths.

Rail-to-Rail Output and Supply Range:

The SGM8091XS/TR supports rail-to-rail output swing, maximizing dynamic range and performance on low-voltage supplies ranging from 2.1V to 5.5V. In contrast, while the AD8091ARZ supports output swing close to the rails, it does not offer true rail-to-rail output, potentially limiting signal swing in compact or battery-operated systems. This gives SGMICRO a key advantage in single-supply and low-voltage applications.

Package and Form Factor:

The SGM8091XS/TR is available in a compact SOT-23-5 package, which matches the form factor of the AD8091ARZ/AD8091ARZ-REEL7. This ensures easy drop-in replacement and compatibility in existing designs. Furthermore, SGMICRO provides TR (tape and reel) packaging optimized for automated production lines, ensuring seamless integration into high-volume manufacturing.

Thermal and Environmental Performance:

Both devices are specified for operation across a wide industrial temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments. SGMICRO’s proprietary CMOS process and stringent testing ensure that the SGM8091XS/TR delivers robust thermal stability and long-term reliability, especially in mission-critical systems.

Cost and Supply Chain Advantage:

The SGM8091XS/TR offers a significant cost advantage over the AD8091ARZ series, making it ideal for cost-sensitive designs without compromising on quality or reliability. In addition, SGMICRO’s domestic manufacturing and supply chain capabilities provide customers with improved lead times, enhanced logistics stability, and reduced dependence on international sourcing — an increasingly critical factor in today’s global component procurement landscape.

Conclusion:

While the AD8091ARZ/AD8091ARZ-REEL7 from Analog Devices are strong candidates for high-speed analog applications, the SGMICRO SGM8091XS/TR is an optimal solution for applications requiring low power, low noise, and rail-to-rail output at a significantly lower cost. With excellent performance for moderate-speed applications, the SGM8091XS/TR meets the needs of modern analog systems demanding energy efficiency, compact form factor, and sourcing flexibility — making it a compelling alternative for next-generation designs.