LM324D - Quad 36V Op Amp | Texas Instruments | SOIC-14 (Tape & Reel)
料号： LM324D ✓ 量产中LM324D 概述
An operational amplifier is an analog amplifier used in the wider semiconductor hierarchy of integrated circuits and analog signal-processing devices. The LM324 family is commonly used for voltage buffering, sensor-interface conditioning, current-to-voltage conversion, audio paths, filters, and control loops. Its single-supply capability is useful when the signal and system share a common ground reference, while split-supply operation supports bipolar signals in applications where positive and negative rails are available.
Verified feature data identifies the LM324 family as a next-generation LM324B and LM2902B offering, with B versions intended as drop-in replacements for LM224, LM324, and LM2902 versions. The listed operating supply range is 3 V to 36 V. The family also includes versions with input offset voltage specified as low as plus or minus 2 mV, 2 kV HBM ESD protection for B, BA, and K versions, and internal RF and EMI filtering for B and BA versions. These features support general-purpose analog designs where supply tolerance and input conditioning matter.
The LM324D is packaged in the SOIC-14 footprint, making it suitable for conventional PCB assembly and educational, industrial-control, instrumentation, and embedded-control designs. The device is not a precision, rail-to-rail-input amplifier, so input common-mode range, output swing, input bias current, noise, slew rate, and stability behavior must be checked against the actual signal path. The four amplifiers share a package power supply but operate independently at their input, output, and feedback pins.
Typical uses include four-channel sensor buffering, low-frequency active filtering, audio preamplification, DC gain stages, comparator-style threshold conditioning with suitable feedback arrangements, and general embedded analog interfaces. When designing around the LM324D, verify the supply rails, keep input and feedback connections short, provide stable bypass capacitance near the supply pins, and account for the amplifier’s output-current and thermal limits. The manufacturer product page and datasheet are the authoritative sources for exact electrical limits and ordering information.
This page combines verified manufacturer and distributor links with application guidance and explicitly marks electrical details that were not supplied in the verified excerpts. The LM324D remains a practical choice when four general-purpose amplifiers, single-supply operation, and a standard SOIC-14 footprint are more important than precision or rail-to-rail performance.
直接替换替代料： LM324D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM324D （相同外形与封装尺寸） ——差异在于 Amplifier Type.
LM324BDR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM324ADR2G
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →LM324D 最大额定值与电气特性
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Amplifiers | 4 |
| Architecture | Four independent high-gain frequency-compensated operational amplifiers |
| Supply Voltage Range | 3 V to 36 V for B versions |
| Input Offset Voltage | Plus or minus 2 mV maximum for BA versions at 25 C |
| ESD Protection | 2 kV HBM for B, BA, and K versions |
| Input Filtering | Internal RF and EMI filter for B and BA versions |
| Supply Configuration | Single supply or split supply |
| Frequency Compensation | Internal |
| 封装 | 14-pin SOIC |
| 安装类型 | Surface mount |
| Device Type | Low-power operational amplifier |
| Input Type | Differential input |
| 输出类型 | Single-ended output |
| Operating Class | Standard general purpose |
LM324D 14-pin soic 引脚配置指南
LM324D（14-pin soic 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LM324D.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM324D 适用于 6 应用s: Four-Channel Sensor Conditioning, Industrial Analog Interfaces, Audio Signal Conditioning, Active Filters and Low-Frequency Controls, Embedded Control Analog Front Ends, Power-Supply Monitoring and Feedback.
Four-Channel Sensor Conditioning
LM324D fits low-frequency sensor-conditioning boards where four analog channels need buffering, gain, or active filtering in one SOIC-14 package. The verified family supply range of 3 V to 36 V for B versions gives the design room to operate from low-voltage logic or a higher analog rail, while internal frequency compensation supports general-purpose closed-loop use. Each amplifier can process one sensor, reducing package count and simplifying routing. Before finalizing, verify common-mode input range, input bias current, offset voltage, output swing, and ADC input limits against the sensor source impedance and signal amplitude.
推荐
Industrial Analog Interfaces
The LM324D is appropriate for general industrial analog interfaces that require multiple amplifier channels on a shared board. Its verified single-supply or split-supply operating concept and 3 V to 36 V B-version range make it useful for control and instrumentation blocks that must accommodate different supply arrangements. The four independent channels can implement voltage followers, gain stages, or first-order active filters. Layout should keep high-impedance inputs short, provide local supply bypassing, and route feedback traces away from noisy switching nodes to avoid degrading accuracy.
推荐
Audio Signal Conditioning
LM324D can support low-frequency audio preamplification, mixing, and buffering stages when the signal bandwidth does not require a high-speed audio amplifier. The four channels allow several gain or buffer functions to be combined in one standard SOIC-14 package, reducing board area. Because the verified data does not provide the exact noise, slew-rate, gain-bandwidth, and output-current figures, the designer must confirm that the intended audio bandwidth and load impedance remain within the family’s electrical limits. Decouple the supply pins and use short, shielded feedback paths to reduce noise pickup.
推荐
Active Filters and Low-Frequency Controls
LM324D is a practical candidate for first-order and modest low-frequency active-filter stages because the family provides four internally frequency-compensated amplifiers. One IC can implement multiple filter sections, buffer stages, or control-loop blocks while operating from a common supply. The 3 V to 36 V B-version supply range provides useful flexibility, but the exact gain-bandwidth product, slew rate, noise, and output capabilities were not included in the verified excerpts. Confirm stability at the intended gain, capacitor tolerances, signal amplitude, and load before production release.
推荐
Embedded Control Analog Front Ends
LM324D can serve embedded-control boards that need inexpensive, multi-channel conditioning for switches, dividers, transducers, and actuator feedback. The four-channel arrangement helps consolidate common analog tasks around a microcontroller or communications interface, while the 14-SOIC package is widely supported by conventional assembly methods. The device is best used when its input offset, bias current, common-mode range, and output swing are compatible with the sensed signal. Use a precision reference and appropriate filtering if the control loop requires accuracy beyond general-purpose performance.
推荐
Power-Supply Monitoring and Feedback
LM324D can be used in non-isolated monitoring and feedback circuits where several voltages or conditions need independent comparison, amplification, or signal shaping. The wide B-version supply range allows the amplifier to sit alongside higher-voltage monitoring circuitry when its absolute ratings are respected. The four channels can reduce the number of discrete amplifier packages, but the verified material does not provide the exact input protection, common-mode, slew-rate, or transient-response limits. Keep high-voltage nodes physically separated, verify absolute maximum ratings, and use resistor networks to limit fault current.
推荐
推荐产品汇总
工程参考数据： LM324D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LM324BDR | LM324ADR | LM324D |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Amplifier Count | 4 | 4 | 4 | 4 |
关键差异点
- Four integrated general-purpose amplifiers in one package （对比 LM324BDR)
- Wide B-version supply capability （对比 LM324ADR)
- Documented availability and starting price visibility （对比 LM324BDR)
设计说明
Place the LM324D close to the signals it conditions and keep each non-inverting, inverting, and feedback route short. Separate sensitive input traces from switching nodes and power inductors. Because the device contains four amplifiers in one SOIC-14 package, maintain consistent grounding and route each feedback loop locally rather than creating long shared paths between channels.
Add local supply bypass capacitance near the device power pins and verify the selected capacitors against the supply voltage and application stability requirements. The verified family supports single- or split-supply operation and a 3 V to 36 V B-version range, but the exact decoupling and transient requirements must be taken from the manufacturer datasheet. Confirm startup, output settling, and load behavior at the actual supply voltage.
Do not treat the LM324D as a precision or automatically rail-to-rail-input amplifier. Check input common-mode range, output swing, input bias current, offset voltage, gain-bandwidth product, slew rate, and maximum output current before finalizing a signal path. For sensor inputs with high source impedance or measurements requiring low offset, use appropriate bias compensation, filtering, or a more precise amplifier instead.
Calculate amplifier dissipation from the actual supply voltage, output voltage, load current, and quiescent current using Pdiss approximately equal to (VIN minus VOUT) multiplied by ILOAD plus quiescent power. The verified excerpts do not provide package thermal resistance or maximum output current, so no final temperature rise can be stated. Validate the result against the datasheet limits and the PCB copper available around the SOIC-14 package.
合规信息
The supplied verified excerpts identify the family and features but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Verify these attributes using the current manufacturer product documentation and applicable distributor declarations.