LM324NE4 - Quad 14-Pin General-Purpose Op Amp | TI
N.º da peça: LM324NE4 ✓ AtivoLM324NE4 Visão geral
An operational amplifier is a voltage-controlled, differential-input amplifier whose closed-loop behavior is determined primarily by external feedback components. The LM324NE4 belongs to the operational-amplifier, analog-amplifier, and semiconductor hierarchy. Its four independent channels make it useful where several low-frequency analog signals must be amplified, summed, filtered, compared, or buffered within one package.
The four-amplifier configuration provides design flexibility for sensor conditioning, signal buffers, active filters, and mixed-signal interfaces. Because each amplifier operates independently, one package can implement four separate signal paths. The 14-pin PDIP format also supports conventional through-hole assembly and is convenient for prototypes, educational systems, industrial control boards, and legacy equipment where maintaining an existing 14-pin footprint is important.
The LM324 family is designed for general-purpose low-frequency applications rather than high-speed or precision signal chains. Internal frequency compensation gives stable operation in many closed-loop configurations without an added compensation network. Applications commonly include DC amplification, voltage followers, comparators, summing amplifiers, transimpedance stages, and low-frequency active filters. The device is not intended for demanding high-bandwidth, low-latency, or precision offset applications.
A practical advantage of the LM324NE4 is flexible supply operation. It can operate from a single positive supply or from split positive and negative supplies, allowing the same device family to support ground-referenced signals and bipolar analog systems. The common-mode input range includes ground, which is useful in single-supply circuits where signal inputs remain near 0 V. Supply bypass capacitors close to the device are still required to control impedance and improve transient response.
When replacing an existing LM324 implementation, verify the required output current, input and output swing, noise, offset, bandwidth, and operating temperature against the complete manufacturer datasheet. A 14-pin package match alone does not establish electrical equivalence, particularly between original and enhanced B-version devices or parts qualified for different applications.
This page organizes the LM324NE4 package, electrical characteristics, application guidance, verified drop-in candidates, and design considerations into a practical engineering reference. It emphasizes where the original LM324NE4 is appropriate, which replacements retain the 14-pin footprint, and which parameters must be checked before approving a substitution.
Alternativas drop-in para LM324NE4 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LM324NE4 (mesmo formato e footprint) — diferindo em Amplifier Count, Frequency Compensation, Supply Configuration.
LM324N/NOPB
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM324AN/NOPB
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM324NE3
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324NG
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324N
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324NE4 Classificações máximas e características elétricas
| Amplifier Count | 4 circuits |
| Device Type | General-purpose operational amplifier |
| Channel Architecture | 4 independent amplifiers |
| Encapsulamento | 14-pin PDIP |
| Tipo de montagem | Through-hole |
| Supply Configuration | Single supply or split supply |
| Frequency Compensation | Internally frequency compensated |
| Common-Mode Input Range | Includes ground |
| Status RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Configuração de pinos do LM324NE4
| Pino 1 | OUT1 — Amplifier 1 output |
| Pino 2 | IN1- — Amplifier 1 inverting input |
| Pino 3 | IN1+ — Amplifier 1 non-inverting input |
| Pino 4 | V+ — Positive supply connection |
| Pino 5 | IN2+ — Amplifier 2 non-inverting input |
| Pino 6 | IN2- — Amplifier 2 inverting input |
| Pino 7 | OUT2 — Amplifier 2 output |
| Pino 8 | OUT3 — Amplifier 3 output |
| Pino 9 | IN3- — Amplifier 3 inverting input |
| Pino 10 | IN3+ — Amplifier 3 non-inverting input |
| Pino 11 | V- — Negative supply connection or ground in single-supply operation |
| Pino 12 | IN4+ — Amplifier 4 non-inverting input |
| Pino 13 | IN4- — Amplifier 4 inverting input |
| Pino 14 | OUT4 — Amplifier 4 output |
Aplicações típicas
LM324NE4 é adequado para 6 aplicaçãos: Single-Supply Sensor Signal Conditioning, Industrial Control and Actuator Interfaces, Active Audio and Low-Frequency Filters, Power Supply and Voltage Monitoring Circuits, Data Acquisition and Analog Multiplexing Front Ends, Legacy Through-Hole Instrumentation.
Single-Supply Sensor Signal Conditioning
The LM324NE4 is well suited to conditioning low-frequency sensor outputs in 5 V or other single-supply systems because its four independent channels can amplify, filter, and buffer several stages. Its common-mode input range includes ground, helping circuits process signals near the lower supply rail. Each internally compensated channel can implement a noninverting amplifier or voltage follower with external resistors. The designer should still verify output swing, load capability, and stability against the manufacturer datasheet. A practical advantage is consolidation: four analog functions can occupy one 14-pin PDIP rather than four separate amplifier packages, reducing board area in industrial controls, instrumentation, and educational circuits.
Recomendado
Industrial Control and Actuator Interfaces
The LM324NE4 can provide the low-frequency amplification and buffering required between industrial sensors, controller inputs, and actuator drive stages. Four channels allow one package to handle multiple control signals, reducing component count while preserving independent gain settings and feedback networks. Because the amplifiers are internally compensated, straightforward voltage-amplifier configurations can be implemented without external compensation capacitors. Single- or split-supply operation supports both grounded sensor systems and bipolar control signals. Designers should confirm the required output-current capability and rail-to-rail behavior for the attached load, especially when driving a larger capacitor or relay-driver stage, and should include local supply bypass capacitance for stable operation.
Recomendado
Active Audio and Low-Frequency Filters
The LM324NE4 is appropriate for low-frequency active-filter and audio preamplification circuits built with passive R-C networks around each amplifier. Its four channels permit multistage filters, summing paths, or separate input buffers without requiring multiple quad packages. Internal frequency compensation removes the need for an external compensation capacitor in standard closed-loop configurations, making gain and phase calculations more approachable. The performance tradeoff is that this general-purpose family is better suited to moderate-bandwidth audio and control signals than to high-frequency precision filtering. Select resistor values and capacitance using the manufacturer gain-bandwidth, slew-rate, and stability data, and keep feedback paths short to avoid parasitic oscillation.
Recomendado
Power Supply and Voltage Monitoring Circuits
The four channels in the LM324NE4 can support threshold comparisons, scaled monitoring signals, buffered references, and error-amplifier stages within a linear power-supply or battery-monitoring design. Its ability to operate from a single supply or split supply makes it useful in both positive-only and bipolar systems. The internal compensation simplifies closed-loop error-amplifier layouts when stability requirements are moderate. When monitoring a supply rail, the input common-mode range must remain within the permitted operating region, and offset accuracy may set the detection threshold. This device is best selected for general monitoring rather than precision measurement; check input offset, bias current, and output swing before using it in a high-accuracy protection threshold.
Recomendado
Data Acquisition and Analog Multiplexing Front Ends
The LM324NE4 can buffer sensor outputs and condition multiple low-frequency channels before multiplexing or digitization. Four independent amplifiers allow each input to receive its own gain stage or voltage follower, reducing interaction between channels and simplifying PCB routing. The internal common-mode range that includes ground is useful when unipolar converters produce signals near zero volts. A key design consideration is settling and bandwidth: the selected feedback network must preserve the required accuracy and acquisition time, so the application should be evaluated against the device's slew-rate and gain-bandwidth characteristics. The DIP package is particularly convenient for data-acquisition prototypes and legacy control cards that require through-hole replacement.
Recomendado
Legacy Through-Hole Instrumentation
The LM324NE4's 14-pin PDIP format is useful when repairing or extending legacy instrumentation that already uses a through-hole quad operational-amplifier footprint. Four complete channels can replace several separate amplifier sections while preserving the board's mechanical and electrical layout conventions. This is especially practical for educational instruments, bench power supplies, relay-control boards, and older measurement interfaces. Before fitting the device, verify that every replacement position uses the same pin numbering and that the original circuit's load, supply, and temperature requirements remain satisfied. Avoid substituting a surface-mount part when it would require lead forming or board changes; the DIP package simplifies inspection, repair, and prototype work.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM324NE4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM324N/NOPB | LM324AN/NOPB | LM324NE3 | LM324NG | LM324N |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | onsemi |
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Amplifier Count | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Supply Configuration | Single or split supply | Single or split supply | Single or split supply | Single or split supply | Single or split supply | Single or split supply |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
Principais diferenciais
- Original Texas Instruments orderable device in a serviceable through-hole package (vs LM324NG)
- Four complete general-purpose channels in one package (vs LM2904P3)
- Internal frequency compensation simplifies standard feedback networks (vs LM324AN/NOPB)
- Single- and split-supply flexibility for grounded and bipolar signals (vs LM324N)
Notas de projeto
Place the supply bypass capacitors directly between pins 4 and 11 and the appropriate supply rails. The exact capacitance is not stated in the product information, so select it from the manufacturer datasheet and stability guidance rather than reusing a value without checking the operating gain. In single-supply operation, pin 11 is the ground reference; in split-supply operation, it connects to the negative rail.
Use the manufacturer pin-description table before assigning signals on the 14-pin PDIP footprint. Keep each feedback network close to its amplifier, avoid routing inputs beside supply and output paths, and provide a low-impedance ground reference. The DIP format allows generous lead spacing, but the body still requires clearance from adjacent tall components and should be oriented to match the board's pin-1 marking.
Do not treat every LM324 orderable code as electrically identical. The enhanced B and BA versions have different supply and offset characteristics, and packaging or temperature-grade suffixes may also change ordering information. Before replacing an LM324NE4, compare the exact ordering code, supply range, common-mode range, output swing, load current, stability, and temperature grade. Also connect unused inputs to a defined voltage to prevent unstable output behavior.
The LM324 family is intended for general-purpose low-frequency amplification rather than high-speed signal conditioning. Avoid presenting it as a rail-to-rail, precision, or high-bandwidth solution. Keep source impedances low where practical, minimize capacitance on amplifier inputs, and use the lowest practical gain-bandwidth-compatible closed-loop gain. For ADC or DAC interfaces, verify settling, slew rate, output swing, and capacitive-load behavior in the manufacturer documentation.
Informações de conformidade
No specific environmental or product-compliance declarations are stated in the listed product information. Confirm current declarations with Texas Instruments before production release.