LM324NSRE4 - Quad 1.2 MHz Op Amp | Texas Instruments | 14-SO
料号： LM324NSRE4 ✓ 量产中LM324NSRE4 概述
A general-purpose operational amplifier is a voltage-amplifying semiconductor that uses high open-loop gain and negative feedback to create stable, predictable closed-loop behavior. The LM324 belongs to the operational-amplifier hierarchy within analog and mixed-signal semiconductors. Four independent amplifiers in one package allow compact designs to implement buffers, voltage followers, summing amplifiers, comparators, instrumentation-style signal conditioning, and general feedback networks without requiring four separate packages.
Key characteristics include a 1.2 MHz typical gain-bandwidth product, a 0.5 V/us typical slew rate, and a supply-current drain of 0.8 mA typical. The common-mode input voltage range includes ground, which is particularly useful for battery-powered equipment and sensors operating near 0 V. The four amplifiers are frequency compensated, reducing the external compensation components normally required around each output. Their common design is suited to low-frequency signal conditioning rather than high-speed precision analog processing.
The LM324NSRE4 architecture is intended for single or dual supplies. With split supplies, the midpoint of the two rails serves as the signal reference; with a single supply, the input and output signals are referenced to ground and must remain within the amplifier’s common-mode and output-swing limits. Because the package contains four independent amplifiers, designers can use unused sections for testing or bring them to a defined state in accordance with the manufacturer’s recommendations.
Typical uses include low-cost sensor interfaces, industrial control loops, audio preamplifier stages, audio and communication filters, transducers, test equipment, and instrumentation. The 14-pin SOIC package provides a practical surface-mount option for prototypes, medium-density analog boards, and general-purpose embedded systems where four matched-function amplifier sections reduce board area and assembly cost.
Design should account for input offset, output swing, unity-gain stability, source impedance, and supply headroom. Decoupling capacitors should be placed close to the supply pins, and sensitive analog signals should be routed away from switching nodes. The LM324NSRE4 is preferable where cost, supply range, and four integrated amplifiers matter more than the lower offset voltage, wider bandwidth, or faster slew rate offered by precision or high-speed amplifier families.
This page organizes the LM324NSRE4 electrical characteristics, package information, replacement candidates, application guidance, and engineering trade-offs into a practical selection reference. It also identifies which replacement details must be checked against each manufacturer’s current datasheet before a component is approved for production.
直接替换替代料： LM324NSRE4 ——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： LM324NSRE4 （相同外形与封装尺寸） ——差异在于 Amplifier Type, Architecture, Input Offset Voltage, Number of Amplifiers, Package.
LM324NSR
✅ 直接替换📋 参考替代料（不在目录中）
LM324KNS
✅ 直接替换📋 参考替代料（不在目录中）
LM324D
✅ 直接替换联系询价
查看数据手册 →LM324ADR2G
✅ 直接替换联系询价
查看数据手册 →LM324NSRE4 最大额定值与电气特性
| Number of Amplifiers | 4 circuits |
| Amplifier Type | Single-supply general-purpose operational amplifier |
| 封装 | 14-pin SOIC (14-SO) |
| Supply Range | 3 V to 36 V for B and BA versions |
| Single-Supply Operation | Supported |
| Split-Supply Operation | Supported |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/us |
| Supply-Current Drain | 0.8 mA typical |
| Common-Mode Input Range | Includes ground |
| Architecture | 4 independent frequency-compensated amplifiers |
| Input Offset Voltage | 3 mV maximum for B-version family; exact LM324NSRE4 limit requires datasheet confirmation |
| 安装类型 | Surface mount |
| Shipping Form | Tape and reel |
LM324NSRE4 14-pin soic (14-so) 引脚配置指南
LM324NSRE4（14-pin soic (14-so) 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： LM324NSRE4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM324NSRE4 适用于 6 应用s: Industrial Sensor Signal Conditioning, Audio Preamplifier and Filtering, Single-Supply Battery Monitoring, Control-System Error Amplifier, Test and Measurement Buffering, Communication Interface Conditioning.
Industrial Sensor Signal Conditioning
The LM324NSRE4 is suitable for conditioning outputs from low-power sensors because each package contains four independent amplifiers and the common-mode input range includes ground. A typical signal path can use one section as a unity-gain buffer, another for gain, and the remaining sections for offset correction or an active filter. The 1.2 MHz typical gain-bandwidth product supports low-frequency industrial measurements, while the 0.5 V/us slew rate handles moderate edge rates. In a single 5 V system, verify that the sensor signal and required output remain inside the common-mode and output-swing limits before scaling the circuit.
推荐
Audio Preamplifier and Filtering
LM324NSRE4 can implement inexpensive audio preamplifier, mixer, and active-filter stages where frequency response below a few hundred kilohertz is sufficient. Its four internally compensated amplifiers allow several gain or summing sections in one 14-pin SOIC, reducing board area compared with discrete single-amplifier packages. The 1.2 MHz typical gain-bandwidth product gives useful closed-loop bandwidth at moderate noise gains, while the 0.5 V/us slew rate constrains large-signal output. Headroom must be checked for the selected rail, especially when the input contains microphone bias or line-level signals.
推荐
Single-Supply Battery Monitoring
The LM324NSRE4 fits low-voltage battery monitoring because it supports single-supply operation and its common-mode input range includes ground. One amplifier can buffer a divided battery voltage, another can amplify a thermistor or current-sense output, and the remaining sections can form gain stages for an ADC input. Its 0.8 mA typical supply-current drain is useful in power-constrained equipment. The principal design trade-off is input offset and noise: when measuring small sensor voltages, compare the family offset limit of 3 mV for B versions against the smallest signal and required measurement accuracy.
推荐
Control-System Error Amplifier
The LM324NSRE4 can serve as an error amplifier, integrator, or comparator element in low-frequency industrial control loops. The 1.2 MHz typical gain-bandwidth product is generally more than adequate for slow feedback loops and is paired with internal frequency compensation that simplifies analog implementation. Four independent sections permit a controller, signal monitor, output buffer, and auxiliary threshold function in one package. Stability must be evaluated with the actual sensor and actuator impedances because added phase delay in a feedback loop can reduce margin even when the amplifier’s nominal bandwidth is well above the loop bandwidth.
推荐
Test and Measurement Buffering
LM324NSRE4 is useful for general-purpose test and measurement buffering where inexpensive high-gain amplifiers are more important than precision or high speed. Each section can buffer a sensor, amplify a differential stage, or drive a moderate input impedance, with the 14-pin SOIC simplifying PCB layout. The 1.2 MHz typical gain-bandwidth product supports conventional audio and low-frequency instrumentation bandwidth, and the 0.5 V/us slew rate limits the fastest full-scale output transitions. For precision measurements, include the actual offset and drift in the uncertainty budget or move to a precision amplifier when those errors dominate.
推荐
Communication Interface Conditioning
The LM324NSRE4 can amplify and filter low-frequency communication-interface signals without requiring a high-speed amplifier. Typical uses include receive-path amplification, threshold conditioning, level shifting within a single supply, and filtering after a sensor or modem front end. Its common-mode input range includes ground supports signals referenced to the lower rail, and four amplifiers enable a complete receive chain in one package. Keep the gain low enough to preserve stability, observe the 0.5 V/us slew-rate limit, and route the sensitive input away from switching nodes to minimize induced errors.
推荐
推荐产品汇总
工程参考数据： LM324NSRE4 ——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 | LM324NSR | LM324KNS | LM324D | LM324ADR2G |
|---|---|---|---|---|---|
| Package | SOIC-14 (14-SO) | SOIC-14 (14-SO) | SOIC-14 (14-SO) | SOIC-14 (14-SO) | SOIC-14 (14-SO) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Gain-Bandwidth Product | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz |
| Slew Rate | 0.5 V/us | 0.5 V/us | 0.5 V/us | 0.5 V/us | 0.5 V/us |
| Supply-Current Drain | 0.8 mA typical | 0.8 mA typical | 0.8 mA typical | 0.8 mA typical | 0.8 mA typical |
| Common-Mode Input Range | Includes ground | Includes ground | Includes ground | Includes ground | Includes ground |
| Compensation | Internally frequency compensated | Internally frequency compensated | Internally frequency compensated | Internally frequency compensated | Internally frequency compensated |
关键差异点
- Four independent amplifiers in one 14-pin SOIC package （对比 LM2902)
- Single-supply input operation extends to ground （对比 LM324ADR2G)
- Established 1.2 MHz bandwidth and 0.5 V/us slew-rate family （对比 LM324NSR)
- General-purpose four-channel integration reduces board area （对比 LM224)
设计说明
Place the supply-bypass capacitor close to the positive and ground pins, and route the amplifier inputs and feedback components away from switching nodes and high-current traces. The four sections share a common package, so pin 1 orientation must be checked against the PCB footprint before assembly. For unused sections, follow the manufacturer’s recommended input and output states rather than leaving high-impedance inputs floating.
Treat the LM324 as a low-bandwidth amplifier rather than a high-speed device. Its 1.2 MHz typical gain-bandwidth product and 0.5 V/us typical slew rate should be included in closed-loop bandwidth and output-transition calculations. Add compensation only when required by the specific feedback network, and verify stability with the real source impedance, load capacitance, and parasitic capacitance.
Confirm both absolute maximum and recommended supply conditions for the exact ordering code before applying power. The LM324 B-version family uses a 3 V to 36 V supply range, but the exact LM324NSRE4 limits must be read from its manufacturer datasheet. In single-supply operation, calculate output-swing headroom and verify that the input common-mode voltage includes the signal range required by the circuit.
Do not treat every LM324 ordering code as electrically identical despite its shared 14-pin SOIC footprint. Confirm the offset-voltage grade, temperature range, supply limits, device marking, and qualification requirements for LM324NSR, LM324KNS, LM324D, or LM324ADR2G. Substitution is appropriate only when the replacement meets the original circuit’s accuracy, environmental, and production requirements.
合规信息
Compliance status was not established for the exact LM324NSRE4 ordering code. Verify the current manufacturer product page and applicable declarations before production release.
