SGM80582XMS8G/TR Rail-to-Rail Output CMOS Operational Amplifiers

Product Comparison: SGM80582XMS8G/TR vs. ADA4891-2ARMZ / ADA4891-2ARMZ-R7

1. Power Efficiency and Quiescent Current
The SGM80582XMS8G/TR offers a typical quiescent current of just 1.1mA per amplifier, significantly lower than the 3.5mA (typical) of each amplifier in the ADA4891-2ARMZ. This results in a ~69% reduction in static power consumption, making the SGM80582XMS8G/TR highly suitable for power-sensitive applications such as portable instrumentation and battery-powered systems.

2. Supply Voltage Flexibility
SGM80582XMS8G/TR supports a wide single-supply voltage range from 2.5V to 5.5V, enhancing its compatibility with both low-voltage and traditional 5V systems. In contrast, ADA4891-2ARMZ operates over a ±2.5V range (5V total), with more limited single-supply support. This broader voltage tolerance from SGMICRO provides greater design flexibility for engineers targeting modern low-power platforms.

3. High-Speed Performance Balance
SGMICRO’s device offers a gain-bandwidth product (GBW) of 120MHz and a slew rate of 45V/μs, which is close to the 130MHz GBW and 55V/μs slew rate of ADA4891-2ARMZ. While the Analog Devices solution has a slight edge in absolute speed, the SGM80582XMS8G/TR achieves strong high-speed performance with superior energy efficiency, giving it a higher performance-per-milliwatt ratio, ideal for power-performance optimized analog designs.

4. Output Swing and Rail-to-Rail Operation
A significant strength of the SGM80582XMS8G/TR is its true rail-to-rail output, enabling nearly full-swing signal transmission across the supply range. The ADA4891-2ARMZ, while high-performing, does not provide rail-to-rail output, which may limit dynamic range, especially in low-voltage or single-supply systems. This gives the SGMICRO solution a critical advantage in signal chain applications demanding maximum output range.

5. Noise Characteristics
In terms of input-referred voltage noise, the ADA4891-2ARMZ has an edge with 1nV/√Hz, ideal for ultra-low noise requirements such as precision medical or instrumentation applications. The SGM80582XMS8G/TR, while slightly higher at 3.5nV/√Hz, still maintains low noise performance adequate for the vast majority of industrial, video, and portable designs where power and cost outweigh sub-nanovolt noise requirements.

6. Pin Compatibility and Packaging
SGM80582XMS8G/TR is offered in the standard MSOP-8 package, identical in footprint and pinout to the ADA4891-2ARMZ / -R7. This ensures drop-in compatibility, minimizing engineering effort for qualification or substitution. Engineers can easily integrate SGMICRO’s part into existing designs, leveraging the same PCB layout without mechanical modifications.

7. Supply Chain Stability and Cost Advantage
SGMICRO offers competitive pricing and greater supply assurance, especially valuable for customers seeking sourcing diversity or protection against market shortages. In contrast, ADA4891-2ARMZ is subject to supply constraints typical of high-performance analog components from large vendors. SGM80582XMS8G/TR provides cost-effective, consistent availability, well-suited for high-volume or long-lifecycle projects.

Conclusion
The SGM80582XMS8G/TR from SGMICRO offers a compelling combination of low power consumption, rail-to-rail output, wide supply range, and solid high-speed analog performance, positioning it as a strong alternative to ADA4891-2ARMZ / ADA4891-2ARMZ-R7. For engineers seeking a cost-efficient, energy-conscious, and high-speed dual op amp, SGM80582XMS8G/TR is a highly reliable and production-ready solution.