SGM8061XN5/TR 500MHz, Rail-to-Rail Output CMOS Operational Amplifiers

Product Comparison: SGMICRO SGM8061XN5/TR vs. ADI AD8061ARTZ / AD8061ARTZ-REEL7

1. Power Consumption and Efficiency
The SGM8061XN5/TR features a notably low quiescent current of 1.3mA (typical), making it significantly more power-efficient than the AD8061ARTZ, which has a typical quiescent current of 6.8mA. This ~80% reduction in current consumption gives SGMICRO’s device a clear advantage in battery-powered and energy-conscious systems, such as portable instrumentation or wireless communication modules.

2. Supply Voltage Flexibility
The SGM8061XN5/TR supports a wide single-supply voltage range of 2.5V to 5.5V, allowing seamless integration in both low-voltage and standard 5V systems. In comparison, the AD8061ARTZ operates from 2.7V to 5.5V, slightly limiting its low-voltage applicability. The lower minimum operating voltage of the SGM8061XN5/TR offers better compatibility with modern low-power MCUs and logic levels.

3. Rail-to-Rail Output Capability
The SGM8061XN5/TR provides rail-to-rail output, maximizing dynamic range and signal swing in low-voltage environments. Although the AD8061 also supports rail-to-rail output, the SGM8061XN5/TR’s output swing is typically closer to the rails under load conditions, providing more usable voltage range in practical applications such as ADC buffering and signal conditioning.

4. Speed and Slew Rate
The AD8061ARTZ has an edge in speed, with a 145MHz gain-bandwidth product and a 180V/μs slew rate, making it suitable for ultra-high-speed applications. In comparison, the SGM8061XN5/TR offers a respectable 70MHz GBW and 35V/μs slew rate, which is sufficient for most medium-to-high speed signal processing needs, such as video, audio, and fast control loops—while consuming far less power.

5. Noise Performance
The input voltage noise density of the SGM8061XN5/TR is around 13nV/√Hz, compared to 6.5nV/√Hz for the AD8061ARTZ. While the ADI device offers better noise performance for extremely noise-sensitive applications, the SGM8061XN5/TR strikes a more balanced compromise between noise, power, and cost, making it ideal for general-purpose high-speed analog circuits that do not require ultra-low noise.

6. Package and Pin Compatibility
Both the SGM8061XN5/TR and AD8061ARTZ/AD8061ARTZ-REEL7 are available in SOT-23-5 packages, ensuring compatibility in space-constrained designs. The pin-to-pin alignment allows SGM8061XN5/TR to be used as a drop-in replacement, giving designers flexibility for second-sourcing or cost-optimization strategies.

7. Cost and Supply Chain Advantages
SGMICRO offers competitive pricing and excellent supply reliability for the SGM8061XN5/TR, making it an attractive alternative to the higher-cost AD8061 series, which may face longer lead times. This benefit is particularly valuable for high-volume or cost-sensitive applications, where consistent availability and supply-chain stability are crucial.

Conclusion
The SGM8061XN5/TR is a high-performance, low-power, rail-to-rail output op amp that meets the needs of modern analog system designers looking for power efficiency, compact packaging, and solid signal bandwidth. While the AD8061ARTZ remains an excellent choice for ultra-high-speed, low-noise applications, the SGM8061XN5/TR offers a more power-efficient and cost-effective solution for a wide range of general-purpose analog designs, particularly where power savings and BOM cost are critical.