SGM80584XS14G/TR Rail-to-Rail Output CMOS Operational Amplifiers

Product Comparison: SGM80584XS14G/TR vs. ADA4891-4ARZ / ADA4891-4ARZ-R7

1. Power Consumption and Efficiency
The SGM80584XS14G/TR features a remarkably low quiescent current of 1.1mA per amplifier, making it highly efficient for power-sensitive applications. In contrast, the ADA4891-4ARZ consumes approximately 3.5mA per amplifier, resulting in over three times the power consumption. This significant difference gives the SGM80584XS14G/TR a clear advantage in battery-powered and energy-conscious systems.

2. Operating Voltage Range
SGMICRO’s device supports a wide single-supply voltage range from 2.5V to 5.5V, offering flexibility across diverse system voltage rails. Meanwhile, ADA4891-4ARZ operates with ±2.5V supplies (equivalent to 5V total), offering less adaptability in lower-voltage systems. The broader range of the SGM80584XS14G/TR enables more versatile usage in both modern low-voltage designs and traditional 5V environments.

3. Output Swing and Rail-to-Rail Architecture
The SGM80584XS14G/TR integrates rail-to-rail output functionality, which maximizes signal swing and dynamic range, especially important in low-voltage applications. The ADA4891-4ARZ, while offering excellent linearity, does not feature a rail-to-rail output, limiting its effectiveness in achieving full-range voltage output in single-supply systems. This gives SGMICRO's solution a distinct practical advantage in maximizing signal utilization.

4. Speed and Bandwidth
While the ADA4891-4ARZ excels in high-speed performance with a 130MHz gain-bandwidth product and 55V/µs slew rate, the SGM80584XS14G/TR offers a competitive 120MHz GBW and 45V/µs slew rate. Although slightly lower, these parameters still enable the SGM80584XS14G/TR to address a wide range of high-speed analog signal processing tasks, especially where efficiency is prioritized over marginal speed gains.

5. Noise Performance
The ADA4891-4ARZ achieves ultra-low noise levels of 1.1nV/√Hz, suitable for extremely noise-sensitive designs such as instrumentation or medical equipment. The SGM80584XS14G/TR, while offering a higher input-referred noise of approximately 3.5nV/√Hz, provides a well-balanced combination of noise, power, and cost, ideal for general-purpose high-speed applications where ultra-low noise is not the primary constraint.

6. Package and Integration
Both devices are available in industry-standard 14-pin TSSOP packages, enabling easy PCB layout and system integration. This pin compatibility simplifies second-source qualification and allows SGM80584XS14G/TR to serve as a drop-in alternative to ADA4891-4ARZ/ADA4891-4ARZ-R7, offering design flexibility and simplifying procurement strategies.

7. Cost and Supply Chain Advantages
SGMICRO’s SGM80584XS14G/TR offers notable cost advantages compared to the premium-priced ADA4891-4ARZ, helping reduce BOM costs without a major tradeoff in performance. In addition, SGMICRO is recognized for robust local support and consistent supply, whereas availability for ADA4891-4ARZ can occasionally fluctuate due to high demand or long lead times. This supply stability is critical for production continuity in commercial and industrial applications.

Conclusion
The SGM80584XS14G/TR presents a balanced, high-performance, and power-efficient quad operational amplifier, tailored for applications where energy savings, rail-to-rail output, and cost efficiency are key. While ADA4891-4ARZ offers ultra-low noise and slightly higher speed, the SGM80584XS14G/TR provides an outstanding value proposition with strong technical capabilities and practical advantages, making it a highly competitive solution for a broad range of analog signal chain designs.