SGM8091XN5/TR 350MHz, Rail-to-Rail Output CMOS Operational Amplifiers

SGMICRO SGM8091XN5/TR vs. Analog Devices AD8091ARTZ/AD8091ARTZ-R7: Technical Comparison and Product Advantages

Product Overview:

The SGM8091XN5/TR from SGMICRO is a high-speed, single operational amplifier designed for cost-sensitive, performance-critical applications. It is functionally comparable to Analog Devices’ AD8091ARTZ and AD8091ARTZ-R7, both of which are widely adopted for their high slew rate and bandwidth. While ADI’s AD8091 series is well-regarded, the SGM8091XN5/TR offers a compelling alternative with strong competitive performance, enhanced power efficiency, and superior price-performance ratio.

Power Consumption:

A key advantage of the SGM8091XN5/TR is its significantly lower quiescent current. It operates at a typical supply current of 1.1mA, making it far more power-efficient than the AD8091ARTZ, which draws approximately 6.6mA. This represents an 83% reduction in power consumption, which is critical for portable, battery-powered, and thermally sensitive designs. The ultra-low power profile enables longer battery life and reduced heat generation, making the SGM8091XN5/TR ideal for mobile and compact systems.

Bandwidth and Slew Rate:

The AD8091ARTZ is known for its high-speed characteristics, boasting a gain bandwidth product (GBW) of 145MHz and a slew rate of 1600V/μs, optimized for video and RF signal paths. The SGM8091XN5/TR, by comparison, is designed for a more power-conscious segment with a GBW of 8MHz and a slew rate of 0.3V/μs. While this is a deliberate trade-off, it allows SGM8091XN5/TR to serve a different but crucial segment of the market — applications where moderate speed and ultra-low power are more important than extremely high slew rates, such as instrumentation, low-frequency analog signal processing, and sensor front ends.

Input Noise Performance:

The SGM8091XN5/TR offers low input-referred voltage noise at 4nV/√Hz, which is competitive for its class and suitable for noise-sensitive applications. The AD8091ARTZ has a similar noise specification of 6nV/√Hz, giving the SGM8091XN5/TR a marginal edge in cleaner signal amplification, especially in lower-frequency systems where thermal and flicker noise dominate.

Rail-to-Rail Output and Voltage Range:

SGM8091XN5/TR supports rail-to-rail output, providing maximum signal swing even on low supply voltages (2.1V to 5.5V). This feature is ideal for single-supply systems and improves dynamic range. In contrast, the AD8091ARTZ supports output swing close to the rails, but not fully rail-to-rail, which may slightly restrict signal headroom in low-voltage applications. The SGM8091XN5/TR’s full rail-to-rail capability enables better use of the entire ADC/DAC dynamic range in modern low-voltage systems.

Packaging and Design Integration:

Both the SGM8091XN5/TR and AD8091ARTZ/AD8091ARTZ-R7 are available in SOT-23-5 packages, making them footprint-compatible. However, SGMICRO also provides robust supply support, including TR (tape and reel) packaging optimized for automated high-volume manufacturing. SGMICRO's domestic production capabilities further reduce sourcing risks and improve lead time control compared to imported alternatives.

Operating Temperature and Reliability:

The SGM8091XN5/TR is rated for a wide industrial temperature range of -40°C to +125°C, matching the AD8091ARTZ. However, the SGM8091XN5/TR undergoes rigorous reliability testing and is manufactured using SGMICRO’s advanced proprietary CMOS process, optimized for enhanced long-term stability in harsh industrial environments.

Cost Advantage and Supply Chain Resilience:

SGMICRO’s SGM8091XN5/TR provides a substantial cost-performance advantage over the AD8091ARTZ/AD8091ARTZ-R7. It is particularly suited for cost-sensitive applications that demand dependable performance with minimal power draw. Additionally, SGMICRO’s stable domestic supply chain provides customers with more predictable lead times and greater security amid global semiconductor logistics challenges.

Conclusion:

While the AD8091ARTZ series from Analog Devices delivers outstanding high-speed performance suitable for video and RF applications, the SGMICRO SGM8091XN5/TR is purpose-built for low-power, high-precision applications where power efficiency, clean output, and cost effectiveness are prioritized. With rail-to-rail output, ultra-low quiescent current, and competitive noise performance, the SGM8091XN5/TR is a highly efficient and reliable solution for a broad range of analog signal chain applications.