SGM358YMS/TR 1MHz, 60µA, Rail-to-Rail I/O CMOS Operational Amplifiers

Product Positioning and Functional Overview

The SGMICRO SGM358YMS/TR is a dual-channel, low-power CMOS operational amplifier featuring true rail-to-rail input and output, a wide supply range from 2.1 V to 5.5 V, ultra-low supply current (~60 µA per amplifier), and a 1 MHz gain-bandwidth product, targeting battery-powered, sensor interface, and precision general-purpose amplification applications. Its design emphasizes low energy consumption and wide input common-mode range with extended industrial-grade temperature performance. 

In comparison, the LMV358IDGKRG4 device from Texas Instruments is a dual low-voltage operational amplifier with rail-to-rail output support and approximately 1 MHz bandwidth, primarily designed for general-purpose low-voltage amplification. It typically requires a minimum supply voltage of 2.7 V and consumes higher quiescent current per channel, positioning it as a mainstream general-purpose solution rather than an ultra-low-power optimized design. 

Supply Voltage and Power Efficiency

SGM358YMS/TR supports operation from 2.1 V to 5.5 V, enabling use in ultra-low-voltage systems and extending compatibility with modern battery chemistries in portable and energy-sensitive devices. The typical supply current of ~60 µA per amplifier significantly reduces power consumption, which is critical for long-lifetime battery-powered designs. 

By contrast, LMV358IDGKRG4 operates from 2.7 V to 5.5 V and exhibits higher quiescent current (approximately 210 µA total, ~105 µA per channel typical), resulting in higher overall power consumption in similar applications. This difference influences autonomy in battery-powered systems and thermal budgets in compact designs. 

Input/Output Range and Signal Integrity

SGM358YMS/TR features true rail-to-rail input and output, providing maximum signal swing close to both supply rails. It combines this with low input bias current (typical ~10 pA) and low input offset, ensuring robust performance for weak signal amplification such as photodiode interfaces, precision sensor conditioning, or integrator stages. 

The LMV358IDGKRG4 supports rail-to-rail output but its input common-mode range does not extend fully to the positive rail in all conditions, and its typical input bias currents and offset specifications are less optimized for high-precision, low-current signal sources. These characteristics make it suitable for a wide set of general-purpose tasks but less ideal for ultra-low-level sensor front ends. 

Dynamic Performance (Bandwidth and Slew Rate)

Both devices deliver a ~1 MHz gain-bandwidth product, enabling adequate frequency response for filtering and signal conditioning in typical analog circuits.

However, the SGM358YMS/TR exhibits a well-balanced dynamic response with a slew rate (~0.52 V/µs) that supports moderate speed signal transitions while maintaining low quiescent consumption, which benefits low-power sensor acquisition and data conversion front ends. The CMOS architecture also contributes to low noise and stable operation.

The LMV358IDGKRG4 generally has a higher slew rate (~1 V/µs), which can benefit higher dynamic range applications; yet this comes at the cost of increased bias current and overall power draw, which may not be suitable for very low-power environments.

Temperature Range and Reliability for Industrial Applications

SGM358YMS/TR is specified over an extended industrial temperature range of −40 °C to +85 °C, suitable for harsh environments and broad application spaces from consumer to industrial monitoring systems.

The LMV358IDGKRG4 also supports a wide industrial temperature range (typically up to −40 °C to +125 °C). While this offers a wider high-temperature margin, many general-purpose applications do not require such extreme ranges, making the performance-to-power trade-off less optimal compared to the SGM358’s balanced industrial-grade design.

Application Focus and Competitive Strengths

SGM358YMS/TR excels in low-power, precision amplification tasks, including portable instrumentation, sensor interfaces, ASIC buffers, wearable device front ends, and battery-constrained IoT nodes. Its low supply current, true rail-to-rail I/O, and robust input characteristics provide clear advantages where energy efficiency and signal integrity are paramount.

While LMV358IDGKRG4 is a capable, cost-effective general-purpose amplifier with solid performance for many analog circuits such as active filters, buffers, and control loops, **SGM358YMS/TR’s optimized specification set delivers a distinct competitive edge in applications where power efficiency and low-level signal handling directly impact system performance.