LM358P Through-Hole Dual Operational Amplifier Overview
The LM358P from Texas Instruments is a versatile dual operational amplifier (op-amp) designed for general-purpose analog signal processing in through-hole applications. Part of TI??s iconic linear portfolio, it integrates two high-performance op-amps in a robust DIP package, offering low power consumption, a wide voltage range, and reliable operation??making it ideal for hobbyists, educators, and industrial engineers working with legacy equipment. Its through-hole design simplifies prototyping and repairs, while its performance ensures consistent signal amplification in diverse environments. Производитель ИС offers this essential component as part of its portfolio of trusted analog semiconductors.
LM358P Technical Parameters
| Параметр | Значение | Единица |
|---|---|---|
| Функция | Dual General-Purpose Operational Amplifier | |
| Диапазон напряжения питания | 3.0 to 32 | V (single supply); ??1.5 to ??16 (dual supply) |
| Ток покоя (на усилитель) | 0.5 | mA (typical, at 5V) |
| Изделие с полосой пропускания усиления | 1.0 | МГц (типичный) |
| Тип упаковки | DIP-8 (Dual In-Line Package, 8-pin through-hole) | |
| Диапазон рабочих температур | от -40 до +125 | ??C |
Основные функциональные характеристики
| Характеристика | Технические характеристики |
|---|---|
| Входное напряжение смещения | 2.0 mV (maximum, at 25??C) |
| Входной ток смещения | 20 nA (maximum, at 25??C) |
| Коэффициент отклонения синфазного сигнала (CMRR) | 70 dB (minimum) |
| Скорость нарастания | 0.5 V/??s (typical) |
| Выходной ток (на усилитель) | 20 mA (minimum, into 1k?? load) |
Преимущества перед альтернативными решениями для амплификации
The LM358P outperforms discrete single op-amps and surface-mount alternatives, starting with its integrated dual design. By combining two op-amps in one DIP-8 package, it reduces PCB space by 40% compared to using two discrete units??critical for compact hobby projects and legacy industrial control boards. “We cut assembly time by 30% in our educational kits by switching to this dual op-amp instead of two separate ones,” notes a senior engineer at a leading electronics education company.
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Its through-hole DIP-8 package simplifies prototyping and repairs, making it a favorite among hobbyists and technicians working on legacy equipment where surface-mount soldering is impractical. Unlike surface-mount op-amps, it can be easily replaced in field repairs, extending the life of industrial sensors and DIY projects.
With 0.5mA quiescent current per channel, it consumes 60% less power than high-performance op-amps (1.2mA+), extending battery life in portable projects like weather stations. Its 3V?C32V range also eliminates voltage regulators in 9V battery-powered devices and 24V industrial systems, reducing component count.
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Its -40??C to +125??C temperature range ensures reliability in harsh environments, from outdoor sensors to factory floors, outperforming hobby-grade op-amps limited to 0??C?C70??C.
Typical Applications of LM358P
The LM358P excels in through-hole analog signal processing across applications. Key use cases include:
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- Hobby Electronics (DIY sensor projects, audio amplifiers, Arduino-based signal conditioning)
- Industrial Automation (legacy PLC input stages, pressure transducer amplification, motor control feedback)
- Educational Projects (electronics labs, student circuit designs, robotics tutorials)
- Home Appliances (older washing machine control boards, analog thermostat circuits)
- Test and Measurement (DIY oscilloscope probes, signal generators, calibration tools)
Texas Instruments??? Экспертиза в области аналогового проектирования
As a Texas Instruments product, the LM358P 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. This commitment has made TI a trusted partner for educators, hobbyists, and industrial brands like Arduino, Siemens, and RadioShack, who rely on components like the LM358P for reliability and accessibility.
Часто задаваемые вопросы (FAQ)
What is a dual operational amplifier, and how does the LM358P work?
A dual op-amp integrates two independent amplifiers in one package, processing two signals simultaneously. The LM358P amplifies weak signals from sensors (e.g., thermistors, photodiodes) to levels readable by microcontrollers. Each amplifier can be configured for tasks like voltage amplification or filtering, making it versatile for multi-sensor projects and legacy circuits.
Why is the 3V?C32V supply range useful for hobbyists?
This range works with common hobby power sources: 3V coin cells, 9V batteries, 12V wall adapters, and 24V industrial supplies. Unlike fixed-voltage op-amps, it avoids voltage converters, simplifying designs. Hobbyists can reuse the same op-amp in battery-powered projects and bench-top circuits, reducing part inventory.
How does the DIP-8 package benefit prototyping?
The DIP-8??s through-hole design fits breadboards and perfboards, simplifying testing and iteration??critical for hobbyists and students. Its large pins (0.1″ spacing) are easy to hand-solder, unlike tiny surface-mount packages. This makes it ideal for learning circuits or repairing legacy equipment with through-hole PCBs.
Is the LM358P suitable for beginner electronics projects?
Yes. Its unity-gain stability eliminates external components, simplifying circuit design for beginners. The through-hole package is easy to handle, and its wide voltage range???? common wiring mistakes (e.g., accidental 9V instead of 5V). It??s a staple in educational kits for teaching amplification basics.
What does “unity-gain stable” mean for the LM358P?
Unity-gain stable means the op-amp works reliably with a gain of 1 (no amplification) without oscillating. This eliminates the need for external capacitors or resistors to stabilize it, simplifying circuits. For beginners and cost-sensitive projects, this reduces complexity and component count, making it easier to build functional circuits.