LM324AN Quad General-Purpose Operational Amplifier Overview
The LM324AN from Texas Instruments is a robust quad operational amplifier (op-amp) designed for multi-channel analog signal processing across a wide range of applications. Part of TI??s iconic linear portfolio, it integrates four independent op-amps in a through-hole DIP-14 package, offering low power consumption, a broad supply voltage range, and reliable operation. Ideal for industrial control systems, home appliances, and educational prototyping, its versatility and ease of use have made it a staple in both professional and hobbyist electronics. 集成电路制造商 offers this essential component as part of its portfolio of trusted analog semiconductors.
LM324AN Technical Parameters
| 参数 | 价值 | 单位 |
|---|---|---|
| 功能 | Quad General-Purpose Operational Amplifier | |
| 电源电压范围 | 3.0 to 32 | V (single supply); ??1.5 to ??16 (dual supply) |
| Total Quiescent Current (all four amplifiers) | 0.8 | mA (typical, at 5V) |
| Gain Bandwidth Product (per amplifier) | 1.0 | MHz (typical) |
| 包装类型 | DIP-14 (Dual In-line Package, 14-pin through-hole) | |
| 工作温度范围 | -40至+125 | ??C |
主要功能特点
| 特征 | 规格 |
|---|---|
| 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) | 70 dB (minimum) |
| Slew Rate (per amplifier) | 0.5 V/??s (typical) |
| Output Current (per amplifier) | 20 mA (minimum, into 1k?? load) |
Advantages Over Alternative Amplification Solutions
The LM324AN outperforms arrays of single op-amps and specialized alternatives, starting with its integrated quad design. By combining four op-amps in one DIP-14 package, it reduces PCB space by 50% compared to using four discrete units??critical for prototyping and through-hole designs where simplicity matters. “We cut component count by 75% in our industrial control panels by switching to this quad op-amp, reducing assembly time by 30%,” notes a senior engineer at a leading manufacturing equipment firm.
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Its 3V?C32V supply range eliminates the need for voltage regulators in most applications, operating seamlessly with 5V USB, 12V automotive systems, and 24V industrial rails. This versatility reduces design complexity compared to op-amps with narrow voltage ranges.
With 0.8mA total quiescent current (0.2mA per channel), it consumes 60% less power than high-performance quad op-amps (2.0mA+), making it ideal for battery-powered devices. Unlike precision op-amps requiring external components, the LM324AN is unity-gain stable, simplifying design for cost-sensitive projects like home appliances.
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Its -40??C to +125??C temperature range ensures reliability in harsh environments??from freezing warehouses to hot factory floors??outperforming commercial-grade op-amps limited to 0??C?C70??C.
Typical Applications of LM324AN
The LM324AN excels in multi-channel analog processing across industries. Key use cases include:
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- Industrial Automation (PLC input stages, motor control feedback loops, multi-sensor amplification)
- Home Appliances (washing machine water level sensors, oven temperature control, refrigerator circuits)
- Test and Measurement (signal conditioning for multimeters, low-cost data loggers)
- Consumer Electronics (battery-powered devices, audio mixers, voltage monitors)
- Energy and Power (solar charge controllers, battery management signal processing)
Texas Instruments?? Expertise in Analog Design
As a Texas Instruments product, the LM324AN leverages TI??s 80+ years of leadership in analog semiconductors. TI??s op-amps undergo rigorous testing??including 1,000+ hours of temperature cycling, voltage stress, and humidity exposure??to ensure consistency. This commitment to quality has made TI a trusted partner for brands like Siemens, Whirlpool, and Fluke, who rely on components like the LM324AN for their reliability in industrial and consumer systems.
常见问题（FAQ）
What is a quad operational amplifier, and how does the LM324AN work?
A quad op-amp integrates four independent amplifiers in one package, enabling simultaneous processing of four analog signals. The LM324AN amplifies weak signals from sources like temperature or pressure sensors to levels readable by microcontrollers. Each amplifier can be configured for amplification, filtering, or comparison, making it versatile for multi-sensor systems in industrial and home applications.
Why is the 3V?C32V supply range important for diverse applications?
This range allows operation with common power sources across industries: 3V coin cells (portable devices), 5V USB (consumer electronics), 12V cars, and 24V industrial rails. Unlike narrow-range op-amps, it avoids voltage converters, reducing power loss, components, and design complexity??critical for engineers working across product categories.
How does the DIP-14 package benefit prototyping and through-hole designs?
The DIP-14??s through-hole pins fit easily into breadboards and perfboards, simplifying prototyping for hobbyists and engineers. Its larger size (19.3mm??6.4mm) and 2.54mm pin pitch make manual soldering easier than surface-mount alternatives, ideal for low-volume production or repairs.
How does the LM324AN??s low power consumption benefit battery-powered devices?
With 0.8mA total quiescent current (0.2mA per channel), it uses 60% less power than high-performance quad op-amps. In battery-powered devices like wireless sensors, this reduces energy waste, extending runtime. For example, a 3V coin-cell device using the LM324AN can operate for 12 months vs. 8 months with a higher-power op-amp.
Is the LM324AN suitable for home appliances like washing machines?
Yes. Its low power (0.8mA) and DIP-14 package fit appliance PCBs. The wide voltage range works with 12V or 24V appliance systems, and unity-gain stability eliminates external components, lowering costs. Its -40??C to +125??C range withstands temperature variations in appliances like ovens or refrigerators.