LM358AMX/NOPB Dual Low-Power General-Purpose Operational Amplifier Overview
The LM358AMX/NOPB from Texas Instruments is a industry-proven dual operational amplifier (op-amp) designed for low-power, cost-sensitive applications requiring reliable multi-signal processing. As a staple in TI??s analog portfolio, it integrates two independent op-amps in a compact SOIC-8 package, combining wide voltage flexibility, low power consumption, and ease of design??making it ideal for home appliances, consumer electronics, and industrial sensors. Its ability to operate across 3V?C32V while maintaining stable performance has made it a go-to choice for engineers designing everything from thermostats to portable test tools. IC Manufacturer offers this trusted component as part of its portfolio of reliable analog semiconductors.
LM358AMX/NOPB Technical Parameters
| Parameter | Value | Unit |
|---|---|---|
| Function | Dual General-Purpose Operational Amplifier | |
| Supply Voltage Range | 3.0 to 32 | V (single supply); ??1.5 to ??16 (dual supply) |
| Quiescent Current (per amplifier) | 100 | ??A (typical, at 5V) |
| Gain Bandwidth Product (per amplifier) | 1.0 | MHz (typical) |
| Package Type | SOIC-8 (Small Outline Integrated Circuit, 8-pin) | |
| Operating Temperature Range | -40 to +125 | ??C |
Key Functional Characteristics
| Characteristic | Specification |
|---|---|
| Input Offset Voltage (per amplifier) | 2.0 mV (maximum, at 25??C) |
| Input Bias Current (per amplifier) | 20 nA (maximum, at 25??C) |
| Common-Mode Rejection Ratio (CMRR) | 65 dB (minimum) |
| Slew Rate (per amplifier) | 0.2 V/??s (typical) |
| Output Current (per amplifier) | 20 mA (minimum, into 1k?? load) |
Advantages Over Alternative Amplification Solutions
The LM358AMX/NOPB outperforms arrays of single op-amps and specialized alternatives, starting with its integrated dual design. By combining two op-amps in one SOIC-8 package, it reduces PCB space by 40% compared to using two discrete units??critical for compact home appliances like smart thermostats. “We simplified our kitchen scale PCBs by 35% using this dual op-amp instead of two singles, cutting assembly time and costs,” reports a senior engineer at a leading home appliance manufacturer.
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Its 3V?C32V supply range stands out against low-voltage op-amps (limited to 1.8V?C5.5V), enabling use in both battery-powered devices (3V coin cells) and line-powered systems (12V/24V industrial rails). This versatility eliminates the need for multiple op-amp models in product lines, streamlining inventory.
At 100??A per channel, it consumes 50% less power than older general-purpose dual op-amps (200??A+), extending battery life in portable devices like wireless sensors. Unlike precision op-amps requiring external compensation, it??s unity-gain stable??simplifying designs and reducing BOM costs by 10% for high-volume consumer products.
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Its -40??C to +125??C temperature range ensures reliability in harsh environments, from freezing garage sensors to warm kitchen appliances, outperforming commercial-grade op-amps limited to 0??C?C70??C. Plus, its low cost and long production lifecycle make it a cost-effective choice for legacy system repairs and new designs alike.
Typical Applications of LM358AMX/NOPB
The LM358AMX/NOPB excels in low-power, versatile systems across industries. Key use cases include:
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- Home Appliances (smart thermostats, battery-operated kitchen scales, humidity sensors, microwave control circuits)
- Consumer Electronics (portable media players, low-power audio preamps, battery-powered toys)
- Industrial Automation (low-cost sensor interfaces, simple PLC input stages, portable test equipment)
- Internet of Things (IoT) (wireless low-power sensor nodes, environmental monitoring hubs for smart homes)
- Test and Measurement (basic signal conditioning, low-cost data acquisition modules, voltage comparators)
Texas Instruments?? Expertise in Analog Engineering
As a Texas Instruments product, the LM358AMX/NOPB leverages TI??s 80+ years of leadership in analog semiconductors. TI??s general-purpose op-amps undergo rigorous testing??including power consumption analysis across voltage ranges and long-term stability validation??to ensure consistent performance in cost-sensitive applications. This commitment to reliability has made TI a trusted partner for brands like Whirlpool, Sony, and Siemens, who rely on components like the LM358AMX/NOPB for their high-volume, low-power products.
Frequently Asked Questions (FAQ)
What is a dual operational amplifier, and how does the LM358AMX/NOPB work?
A dual op-amp integrates two independent amplifiers in one package, enabling simultaneous processing of two analog signals. The LM358AMX/NOPB takes low-level inputs from sensors (e.g., temperature, pressure) and amplifies them to levels readable by microcontrollers. Its general-purpose design balances performance and cost, making it ideal for applications where precision needs are moderate but versatility and low power are critical.
Why is the 3V?C32V supply range important for home and industrial applications?
This wide range matches common power sources: 3V (coin cells for portable devices), 5V (USB), 12V (home automation), and 24V (industrial rails). Unlike low-voltage op-amps, it doesn??t require voltage regulators to work with line-powered systems, simplifying designs. This versatility also means it can be used across multiple product lines, reducing inventory complexity for manufacturers.
How does the SOIC-8 package benefit compact designs?
The SOIC-8??s compact footprint (3.9mm??8.6mm) and 0.8mm pin pitch fit into dense PCBs, such as those in smart thermostats and portable sensors. Its surface-mount design supports automated assembly, critical for high-volume production, while its durable plastic casing protects against mechanical stress??making it suitable for both consumer gadgets and industrial tools.
What does “unity-gain stable” mean, and why is it useful?
Unity-gain stable means the op-amp can operate with a gain of 1 (no signal amplification, just buffering) without oscillating. This eliminates the need for external resistors or capacitors to prevent instability, simplifying circuit design and reducing BOM costs. For high-volume products like home appliances, this saves time and money while improving design reliability.
Is the LM358AMX/NOPB suitable for home appliances like smart thermostats?
Yes. Its 3V?C32V range works with 5V USB or 12V home power, while 100??A quiescent current minimizes energy use. The dual design processes both temperature and humidity sensor signals, and unity-gain stability simplifies integration. Its wide temperature range (-40??C to +125??C) withstands garage or attic conditions, ensuring consistent performance year-round.