LM324NG - Quad 3-32V Op Amp | onsemi | Signal Conditioning
N.º da peça: LM324NG ✓ AtivoLM324NG Visão geral
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to control an output stage. The LM324 belongs to the single-supply quad operational-amplifier hierarchy, combining transistor-level input and output stages with internal biasing. Its true differential inputs and common-mode rejection of at least 65 dB make it useful when a circuit must amplify small signals while rejecting voltages common to both inputs.
Key characteristics include four amplifier channels, a 3 V to 32 V supply range, 5 mV maximum input offset voltage, and at least 65 dB common-mode rejection. These parameters support general-purpose amplifier, buffer, and instrumentation functions. The four-channel arrangement reduces package count when several independent analog stages are required, although common supply routing and thermal behavior must be considered on the PCB.
The LM324NG uses a multiplexed internal architecture in which several amplifier sections share internal resources. Although the four circuits are presented as independent amplifiers, bandwidth and slew-rate behavior should be evaluated for the specific combination of active channels. The manufacturer datasheet should be consulted for the complete electrical characteristics, common-mode limits, output-swing limits, quiescent-current behavior, and recommended operating conditions.
Typical uses include low-level signal conditioning, current-to-voltage conversion, sensor amplification, waveform shaping, and general instrumentation. In a buffered sensor frontend, the quad package can provide sensor amplification followed by active filtering or level shifting. In a multi-stage instrumentation circuit, two channels can be used for amplification while the remaining channels perform filtering, offset correction, or output driving when the load and bandwidth requirements permit.
PCB design should keep input traces short, provide a stable ground-return path, and place input and output decoupling capacitors close to the device pins. Check the datasheet for the recommended supply capacitor and confirm that external feedback components preserve the intended closed-loop bandwidth. Avoid placing sensitive input nodes beside switching nodes or high-current return paths, because parasitic coupling can dominate the input offset and common-mode performance.
This product record combines the manufacturer-device description, package identification, electrical highlights, search-oriented technical questions, application guidance, and same-package replacement information. It is designed to help engineers identify the LM324NG quickly, compare it with pin-compatible devices, and plan a practical analog implementation while consulting the manufacturer datasheet for design-limiting details.
Alternativas drop-in para LM324NG — 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 LM324NG (mesmo formato e footprint) — diferindo em Mounting Type, Gain Bandwidth Product, Number of Channels, Package, Packaging.
LM324N
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324N
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324ADR2G
✅ Drop-InConsulte o preço
Ver ficha técnica →LM324BAIDR
✅ Drop-InConsulte o preço
Ver ficha técnica →TL074CN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM324NG Classificações máximas e características elétricas
| Number of Channels | 4 channels |
| Product Type | Single-supply quad operational amplifier |
| Supply Voltage Range | 3 V to 32 V |
| Maximum Input Offset Voltage | 5 mV |
| Minimum Common-Mode Rejection Ratio | 65 dB |
| Listed Input Offset Voltage | 7 mV |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.6 V/us |
| Package Type | 14-pin PDIP |
| Número de pinos | 14 pins |
| Tipo de montagem | Through-hole |
| Status RoHS | Unknown |
| REACH Status | Unknown |
Guia de Configuração de Pinos do LM324NG 14-pin pdip
Configuração de pinos para LM324NG (pacote 14-pin pdip). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para LM324NG.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LM324NG é adequado para 6 aplicaçãos: Low-Level Sensor Signal Conditioning, Instrumentation Buffering, Current-to-Voltage Conversion, Audio Preamplifier and Control Stage, Industrial Control Signal Conditioning, Active Filtering and Waveform Conditioning.
Low-Level Sensor Signal Conditioning
The LM324NG fits low-level sensor signal conditioning because it combines four amplifier channels, true differential inputs, at least 65 dB common-mode rejection, and a 1 MHz gain-bandwidth product in one 14-pin PDIP package. A transducer signal can be amplified first, then filtered or offset-corrected with other channels. The 5 mV maximum input offset listed by Mouser should be checked against the sensor’s minimum useful full-scale signal. Because the LM324NG is not a rail-to-rail precision amplifier, input common-mode range and output swing must also remain within the manufacturer’s limits.
Recomendado
Instrumentation Buffering
The LM324NG is appropriate for instrumentation buffering where a high-impedance source must drive a subsequent measurement or control stage. Its 65 dB minimum common-mode rejection helps reduce common-mode pickup, while four channels allow a complete analog frontend to be consolidated. The 1 MHz gain-bandwidth product supports moderate-bandwidth closed-loop operation rather than high-speed instrumentation. Confirm the maximum output current and output-voltage swing for the intended load, and use short PCB routes between the source, amplifier, and feedback network to minimize added error.
Recomendado
Current-to-Voltage Conversion
The LM324NG can implement a current-to-voltage converter for a photodiode, sensor, or other current-producing device when the required bandwidth and output level remain within its capabilities. The four-channel package permits the transimpedance stage, gain stage, offset stage, and output buffer to share one PDIP package. Its 0.6 V/us slew rate and 1 MHz gain-bandwidth product constrain fast transient and wideband photodiode designs. Feedback resistor capacitance and board leakage should be selected carefully, and the output swing must be verified at the required load.
Recomendado
Audio Preamplifier and Control Stage
The LM324NG can serve as a general-purpose audio preamplifier, mixer, or control-stage amplifier in equipment that does not require rail-to-rail operation or high audio bandwidth. Four channels provide useful flexibility for input amplification, active filtering, gain control, and output buffering. The 1 MHz gain-bandwidth product and 0.6 V/us slew rate limit large-signal bandwidth, while the maximum input offset voltage affects distortion and channel matching at low signal levels. Validate output swing against the speaker or line-level load and verify the supply rails in the manufacturer data.
Recomendado
Industrial Control Signal Conditioning
The LM324NG fits industrial control boards that need multiple general-purpose analog channels for actuator and sensor interfaces. The 3 V to 32 V supply range permits operation from common industrial supply rails, while the through-hole PDIP package supports conventional plated-through-hole assembly. Four channels can process command, feedback, and interlock signals without requiring four separate packages. Engineers should verify the common-mode range at the actual supply voltage and maintain adequate separation from switching power stages to prevent coupling into the input offset and signal path.
Recomendado
Active Filtering and Waveform Conditioning
The LM324NG is suitable for active filters, comparators, oscillators, and waveform-conditioning stages where a low-cost general-purpose amplifier is sufficient. Its four channels can implement a two-stage filter, a comparator plus driver combination, or a rectifier and smoothing chain. The 1 MHz gain-bandwidth product sets the approximate closed-loop bandwidth ceiling, and the 0.6 V/us slew rate affects large-signal behavior. Confirm output swing, load capability, and channel-to-channel behavior in the manufacturer datasheet, then prototype the feedback network before high-volume assembly.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM324NG — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM324N | LM324N | LM324A | LM324B | TL074CN |
|---|---|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Brand | onsemi | onsemi | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
Principais diferenciais
- Four-channel integration in one through-hole package (vs LM2904P3)
- Broad single-supply operating range (vs TLV2402ID)
- General-purpose 1 MHz bandwidth with 0.6 V/us slew rate (vs TL074CN)
Notas de projeto
Keep the two input pins of each amplifier close to their associated feedback components and use a continuous ground plane beneath the analog section. Route sensitive input traces away from switching inductors, motor traces, and high-current supply returns. The LM324NG has a listed maximum input offset voltage of 5 mV, so even small parasitic pickup can be significant in low-level sensor circuits. Place input components before long analog traces and provide a quiet return path directly to the device ground.
Do not assume rail-to-rail input or output behavior. Verify that the intended signal remains inside the manufacturer’s input common-mode range and that the required output level remains inside the output-swing limits under the actual load. Also account for the 3 V to 32 V supply restriction, the 1 MHz gain-bandwidth product, and the 0.6 V/us slew rate. These constraints are especially important when powering the device from a single low-voltage rail.
Check the interaction between closed-loop gain, slew rate, output loading, and the number of simultaneously active channels. Four channels in one package may share internal resources, so a circuit that is acceptable with one amplifier may show reduced bandwidth or slew performance when all four sections operate. Prototype the complete channel configuration, include the intended feedback network, and use an oscilloscope at the amplifier output to confirm rise time and stability before production release.
Informações de conformidade
The manufacturer and distributor records do not provide an unambiguous compliance statement for this exact MPN and suffix. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-mineral status with onsemi for the ordered device.