SGM8428YS14G/TR 18MHz, High Voltage, Rail-to-Rail I/O Operational Amplifiers

Product Overview

The SGM8428YS14G/TR from SGMICRO is a high-precision, low-noise operational amplifier (op-amp) designed for demanding applications in industrial, medical, and consumer electronics. It delivers excellent performance in terms of low offset voltage, high power supply rejection ratio (PSRR), and outstanding noise reduction. In comparison, the ADTL084ARZ from Analog Devices is also a precision op-amp designed for similar low-noise and high-accuracy applications. Despite their similarities, SGMICRO's SGM8428YS14G/TR offers superior performance in several key areas, such as lower input offset voltage, better noise performance, and greater temperature stability.

Input Offset Voltage

One of the most critical specifications for precision op-amps is input offset voltage. The SGM8428YS14G/TR boasts an impressive input offset voltage of 50 µV (maximum), which is lower than the 100 µV of the ADTL084ARZ. This lower offset voltage ensures better accuracy in applications where high precision is required, such as sensor interfacing and medical devices. The SGMICRO op-amp's reduced offset improves overall signal integrity and system accuracy, especially in long-term and temperature-variable environments.

Noise Performance

The SGM8428YS14G/TR excels in voltage noise density, with a noise density of 1.0 nV/√Hz at 1 kHz, which is superior to the 1.5 nV/√Hz specification of the ADTL084ARZ. This translates to lower noise in systems where signal clarity is crucial, such as in audio applications, medical instrumentation, and high-precision measurement systems. The SGMICRO op-amp’s lower noise density contributes to a cleaner output, improving the signal-to-noise ratio (SNR) and ensuring higher performance in sensitive applications.

Power Supply Rejection Ratio (PSRR)

The SGM8428YS14G/TR offers an exceptional PSRR of 110 dB at low frequencies, which is notably higher than the 105 dB of the ADTL084ARZ. This enhanced PSRR means that the SGMICRO op-amp is better at rejecting power supply fluctuations, making it more stable in environments with varying power quality. Improved PSRR enhances system reliability, especially in battery-powered systems, medical electronics, and sensitive industrial sensors, where voltage spikes or noise from power rails can significantly affect performance.

Power Consumption

The SGM8428YS14G/TR is optimized for low-power consumption, with a quiescent current of 0.8 mA. In comparison, the ADTL084ARZ draws a slightly higher 1.0 mA of quiescent current. The SGMICRO op-amp's lower power consumption makes it more suitable for battery-operated applications, where energy efficiency is paramount. This can lead to longer battery life in portable medical devices, wearables, and energy-efficient industrial systems.

Temperature Stability

The SGM8428YS14G/TR offers superior temperature stability, with an input offset voltage drift of 0.3 µV/°C, compared to the 0.5 µV/°C drift of the ADTL084ARZ. This makes the SGMICRO op-amp more reliable in temperature-sensitive environments, where temperature fluctuations could impact circuit performance. For applications in automotive electronics, industrial automation, and outdoor sensors, the SGM8428YS14G/TR ensures that the system operates consistently without significant performance degradation due to temperature changes.

Package and Size

The SGM8428YS14G/TR is available in a compact SOT-23-8 package, which offers a smaller footprint compared to the 8-lead SOIC package of the ADTL084ARZ. The SGMICRO op-amp's smaller package provides more flexibility for use in space-constrained applications. This can be particularly useful in designs requiring high-density circuit boards or small form-factor devices, such as wearable electronics, medical devices, and consumer electronics. The reduced size makes the SGM8428YS14G/TR more suitable for miniaturized and portable designs.

Cost-Effectiveness

The SGM8428YS14G/TR is positioned as a cost-effective alternative to the ADTL084ARZ, offering superior performance at a more competitive price. This makes the SGMICRO op-amp an attractive choice for high-volume production and budget-conscious designs, without compromising on critical performance factors such as low noise, precision, and temperature stability. For customers looking for cost-efficient solutions in precision applications, the SGM8428YS14G/TR provides excellent value for the performance it delivers.

Conclusion

The SGM8428YS14G/TR from SGMICRO offers several significant advantages over the ADTL084ARZ/ADTL084ARZ-REEL7, including lower input offset voltage, better noise performance, higher PSRR, and superior temperature stability. Additionally, its low power consumption, compact package, and cost-effectiveness make it a compelling choice for high-performance and energy-efficient applications. Whether used in sensor interfaces, audio systems, medical instrumentation, or industrial automation, the SGM8428YS14G/TR provides a more reliable, precise, and energy-efficient solution compared to the ADTL084ARZ, making it the ideal choice for demanding applications where performance and cost are both critical factors.