LM324DR Quad Operational Amplifier Overview
The LM324DR from Texas Instruments is a versatile quad operational amplifier (op-amp) designed for general-purpose analog signal processing in multi-channel systems. Part of TI??s iconic linear portfolio, it integrates four high-performance op-amps in a compact package, offering low power consumption, a wide voltage range, and robust operation??making it ideal for cost-sensitive, space-constrained applications. From home appliances to industrial sensors, its ability to handle multiple signal paths simultaneously has made it a staple in electronics design. IC 製造商 提供此重要元件，作為其值得信賴的類比半導體組合的一部分。
LM324DR Technical Parameters
| 參數 | 價值 | 單位 |
|---|---|---|
| 功能 | Quad General-Purpose Operational Amplifier | |
| 供應電壓範圍 | 3.0 至 32 | V (單供電源)；1.5 至 16 (雙供電源) |
| Total Quiescent Current (all four amplifiers) | 0.8 | mA (典型值，5V 時) |
| Gain Bandwidth Product (per amplifier) | 1.0 | MHz (典型值) |
| 包裝類型 | SOIC-14 (Small Outline Integrated Circuit, 14-pin) | |
| 操作溫度範圍 | -40 至 +125 | ??C |
主要功能特性
| 特性 | 規格 |
|---|---|
| Input Offset Voltage (per amplifier) | 2.0 mV（最大值，攝氏 25 度時） |
| Input Bias Current (per amplifier) | 20 nA (最大值，攝氏 25 度時) |
| 共模抑制比 (CMRR) | 70 dB (最小值) |
| Slew Rate (per amplifier) | 0.5 V/??s（典型值） |
| 輸出電流（每個放大器） | 20 mA（最小值，輸入 1k 負載） |
優於其他擴增解決方案
The LM324DR outperforms arrays of single op-amps and higher-power alternatives, starting with its integrated quad design. By combining four op-amps in one SOIC-14 package, it reduces PCB space by 60% compared to using four discrete single op-amps??critical for compact devices like multi-sensor hubs and home appliance control boards. “We cut component count by 40% in our smart thermostat design by using this single quad op-amp instead of four separate units,” notes a senior engineer at a leading home electronics manufacturer.
暢銷產品
With 0.8mA total quiescent current (just 0.2mA per channel), it consumes 70% less power than high-performance quad op-amps (2.5mA+), extending battery life in portable IoT sensors and reducing energy use in always-on devices. Its 3V?C32V supply range eliminates the need for voltage regulation in 12V and 24V industrial systems, simplifying power design and lowering BOM costs.
Unlike specialized op-amps requiring external compensation components, the LM324DR is unity-gain stable, making it ideal 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.
精選產品
Typical Applications of LM324DR
The LM324DR excels in multi-channel analog signal processing across industries. Key use cases include:
- Home Appliances (refrigerator multi-sensor hubs, washing machine control circuits, oven temperature monitoring)
- Industrial Automation (multi-axis sensor signal conditioning, PLC input stages, motor feedback loops)
- Consumer Electronics (portable audio mixers, battery-powered device voltage monitors, gaming peripheral circuits)
- Internet of Things (IoT) (environmental sensor nodes, smart meter multi-signal processing, wireless sensor hubs)
- Medical Devices (low-power patient monitors, blood pressure sensor amplification, portable diagnostic equipment)
德州儀器類比設計的專業知識
As a Texas Instruments product, the LM324DR 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 across production runs. This commitment has made TI a trusted partner for brands like Whirlpool, Siemens, and Philips, who rely on components like the LM324DR for their reliability and performance in critical systems.
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常見問題 (FAQ)
What is a quad operational amplifier, and how does the LM324DR work?
A quad op-amp integrates four independent operational amplifiers in one package, enabling simultaneous processing of four analog signals. The LM324DR amplifies weak signals from multiple sensors (e.g., temperature, humidity, pressure) to levels usable by microcontrollers, with each amplifier configurable for tasks like voltage amplification, filtering, or comparison??critical for multi-sensor systems needing consolidated signal processing.
Why is the 3V?C32V supply range important for diverse applications?
This wide range allows the LM324DR to operate from common power sources: 3V coin cells (IoT sensors), 5V USB (consumer devices), 12V wall adapters (home appliances), and 24V industrial rails. Unlike fixed-voltage op-amps, it avoids the need for voltage converters, reducing power loss, component count, and design complexity across multiple product lines.
How does the SOIC-14 package benefit compact designs?
The SOIC-14??s compact footprint (8.6mm??3.9mm) fits into space-constrained PCBs, such as smart thermostat control boards and portable sensor hubs. Its 14-pin design consolidates four op-amps into one component, eliminating the need for separate placement and routing for discrete op-amps??saving both space and assembly time in high-volume production.
Is the LM324DR suitable for low-power IoT devices?
Yes. With 0.8mA total quiescent current (0.2mA per amplifier), it minimizes power consumption??critical for battery-powered IoT sensors. Its ability to operate at 3V matches common low-voltage batteries, avoiding voltage boost circuits that waste energy. This efficiency extends battery life in devices like wireless environmental monitors by up to 30% compared to higher-power op-amps.
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 amplification) without oscillating, eliminating the need for external compensation components (resistors, capacitors) required by some high-speed op-amps. This simplifies design for engineers working on cost-sensitive projects, reduces BOM costs, and shortens development time??especially valuable for mass-produced consumer and industrial devices.