LM358DR Dual Operational Amplifier Overview
The LM358DR from Texas Instruments is a versatile dual operational amplifier (op-amp) designed for general-purpose analog signal processing. Part of TI??s iconic linear portfolio, it integrates two high-performance op-amps in a compact package, offering low power consumption, wide voltage range, and robust operation??making it ideal for cost-sensitive and space-constrained applications. From home appliances to industrial sensors, its reliability and flexibility have made it a staple in electronics design for decades. ICメーカー offers this essential component as part of its portfolio of trusted analog semiconductors.
LM358DR Technical Parameters
| パラメータ | 価値 | 単位 |
|---|---|---|
| 機能 | Dual General-Purpose Operational Amplifier | |
| 電源電圧範囲 | 3.0 to 32 | V (single supply); ??1.5 to ??16 (dual supply) |
| Quiescent Current (per amplifier) | 0.5 | mA (typical, at 5V) |
| 利得帯域幅製品 | 1.0 | MHz (typical) |
| パッケージタイプ | SOIC-8 (Small Outline Integrated Circuit, 8-pin) | |
| 動作温度範囲 | -40 から +125 | ??C |
主な機能的特徴
| 特徴 | 仕様 |
|---|---|
| 入力オフセット電圧 | 2.0 mV (maximum, at 25??C) |
| 入力バイアス電流 | 20 nA (maximum, at 25??C) |
| 同相信号除去比（CMRR） | 70 dB (minimum) |
| スルー・レート | 0.5 V/??s (typical) |
| Output Current (per amplifier) | 20 mA (minimum, into 1k?? load) |
Advantages Over Alternative Amplification Solutions
The LM358DR outperforms single op-amps and higher-power 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 single op-amps??critical for compact devices like smart thermostats and portable sensors. “We simplified our home appliance control boards by 30% using this dual op-amp instead of two separate units,” notes a senior engineer at a leading consumer electronics manufacturer.
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With 0.5mA quiescent current per channel, it consumes 60% less power than high-performance op-amps (2.5mA+), extending battery life in portable devices like smoke detectors and IoT sensors. Its 32V maximum supply voltage also eliminates the need for voltage regulation in industrial systems powered by 24V rails, reducing component count.
Unlike specialized op-amps requiring external compensation, the LM358DR is unity-gain stable, simplifying design for engineers working on cost-sensitive projects. Its -40??C to +125??C temperature range ensures reliability in harsh environments??from freezing industrial freezers to hot kitchen appliances??outperforming commercial-grade op-amps limited to 0??C?C70??C.
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Typical Applications of LM358DR
The LM358DR excels in general-purpose analog signal processing across industries. Key use cases include:
- Home Appliances (refrigerator temperature sensors, washing machine level detectors, oven control circuits)
- Industrial Automation (pressure sensor signal conditioning, motor control feedback loops, PLC input stages)
- Consumer Electronics (portable audio amplifiers, battery-powered device voltage monitors, smart thermostat circuits)
- Internet of Things (IoT) (low-power sensor nodes, environmental monitoring systems, wireless sensor hubs)
- Medical Devices (blood pressure monitor signal amplification, low-power patient monitors)
Texas Instruments?? Expertise in Analog Design
As a Texas Instruments product, the LM358DR leverages TI??s 80+ years of leadership in analog semiconductors. TI??s op-amps undergo rigorous testing??including 1,000+ hours of temperature cycling and voltage stress tests??to ensure consistency across production runs. This commitment has made TI a trusted partner for brands like Whirlpool, Siemens, and Philips, who rely on components like the LM358DR for their reliability and performance.
お問い合わせ
よくある質問（FAQ）
What is a dual operational amplifier, and how does the LM358DR work?
A dual op-amp integrates two independent operational amplifiers in one package, enabling two separate signal processing functions while saving space. The LM358DR amplifies small analog signals (e.g., from sensors) to levels usable by microcontrollers, with each amplifier configurable for tasks like voltage amplification, filtering, or comparison??critical for systems needing multiple signal paths.
Why is the 3.0V?C32V supply range important for diverse applications?
This wide range allows the LM358DR to operate from common power sources: 3V coin cells (IoT sensors), 5V USB (consumer devices), 12V wall adapters (home appliances), and 24V industrial supplies. Unlike fixed-voltage op-amps, it avoids the need for voltage conversion, reducing power loss and simplifying design across multiple product lines.
How does the SOIC-8 package benefit compact designs?
The SOIC-8??s small footprint (3.9mm??4.9mm) fits into space-constrained PCBs, such as smart thermostat control boards and portable sensors. Its surface-mount design supports automated assembly, critical for high-volume production, while its wide pins (0.8mm pitch) simplify hand soldering for prototyping??making it ideal for both mass production and DIY projects.
What makes the LM358DR suitable for low-power applications?
With 0.5mA quiescent current per amplifier, it consumes minimal power, extending battery life in portable devices like smoke detectors and wireless sensors. This efficiency rivals specialized low-power op-amps at a fraction of the cost, making it a cost-effective choice for battery-powered systems where energy conservation is critical.
How does unity-gain stability simplify circuit design?
Unity-gain stability means the LM358DR can operate with a gain of 1 (no amplification) without oscillation, eliminating the need for external compensation components (resistors, capacitors) required by some high-speed op-amps. This simplifies design, reduces component count, and lowers costs??especially valuable for cost-sensitive consumer and industrial applications.