LM324ADRE4 - Quad 1.2MHz Op Amp in 14-SOIC | Texas Instruments
Артикул: LM324ADRE4 ✓ АктивенLM324ADRE4 Обзор
An operational amplifier is an analog signal-conditioning semiconductor that amplifies the difference between its inverting and non-inverting inputs. The LM324 belongs to the general-purpose op-amp hierarchy, combining four amplifiers in one integrated circuit. This integration reduces board area and simplifies designs requiring multiple low-frequency signal channels, such as sensor conditioning, audio paths, data acquisition, and industrial control loops.
Each channel supports single-supply or dual-supply operation. Key characteristics include a 1.2 MHz gain-bandwidth product, 0.5 V/us slew rate, and a supply-voltage range of ±1.5 V to ±16 V. The four-channel architecture makes the device useful for amplifier arrays, active filters, comparators, buffer stages, and transducer interfaces. The 14-pin SOIC is a standard surface-mount package suitable for conventional PCB assembly and rework.
The LM324ADRE4 is designed for general-purpose applications where a wide bandwidth, adequate slew rate, and economical quad integration are more important than low offset voltage, rail-to-rail output, or high precision. Its 14-pin package provides one amplifier section per three-and-a-half pins, with the positive supply connected to pin 4 and the negative supply connected to pin 11 in the standard dual-supply configuration. Grounding the negative supply pin permits single-supply operation when the signal and output remain within the usable common-mode range.
Typical uses include low-frequency audio amplification, sensor signal conditioning, active filter stages, voltage followers, comparators, and general instrumentation. In multi-stage designs, the four channels can implement cascaded gain, summing, difference, or buffering functions while reducing component count. Independent amplifier sections also allow unused channels to be configured conservatively rather than left floating.
Layout should keep feedback resistors and input traces close to the device, maintain short return paths to the supply ground, and place input bypass capacitance near the supply pins. Check output-current and capacitive-load limits for the selected operating condition. Because the LM324 is a general-purpose amplifier rather than a precision or rail-to-rail part, verify input common-mode range, output swing, offset, and noise requirements against the actual signal.
This page combines the manufacturer-family specifications with same-package alternatives, a parameter comparison, and practical PCB guidance. It is designed to support quick part selection while directing engineers to the manufacturer datasheet and pin-description table for final circuit qualification.
Аналоги без доработки для LM324ADRE4 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с LM324ADRE4 (тот же форм-фактор и посадочное место) — отличается по Amplifier Type, Gain Bandwidth Product, Number of Channels, Package, Packaging.
LM324ADR2G
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Открыть даташит →LM324KAD
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Открыть даташит →LM324KADRG4
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Открыть даташит →LM324ADR2G
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Открыть даташит →LM324BAIDR
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Открыть даташит →LM324ADRE4 Максимальные параметры и электрические характеристики
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Channels | 4 channels |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/us |
| Supply Voltage Range | ±1.5 V to ±16 V |
| Корпус | 14-pin SOIC |
| Число выводов | 14 pins |
| Тип монтажа | Surface mount |
Конфигурация выводов LM324ADRE4
| Контакт 1 | OUT1 — Amplifier 1 output |
| Контакт 2 | -IN1 — Amplifier 1 inverting input |
| Контакт 3 | +IN1 — Amplifier 1 non-inverting input |
| Контакт 4 | V+ — Positive supply voltage |
| Контакт 5 | +IN2 — Amplifier 2 non-inverting input |
| Контакт 6 | -IN2 — Amplifier 2 inverting input |
| Контакт 7 | OUT2 — Amplifier 2 output |
| Контакт 8 | OUT3 — Amplifier 3 output |
| Контакт 9 | -IN3 — Amplifier 3 inverting input |
| Контакт 10 | +IN3 — Amplifier 3 non-inverting input |
| Контакт 11 | V- — Negative supply voltage or ground for single-supply operation |
| Контакт 12 | +IN4 — Amplifier 4 non-inverting input |
| Контакт 13 | -IN4 — Amplifier 4 inverting input |
| Контакт 14 | OUT4 — Amplifier 4 output |
Типичное применение
LM324ADRE4 подходит для 6 применениеs: Industrial Sensor Signal Conditioning, Low-Frequency Audio Preamplification, Active Audio-Crossover Filters, Data-Acquisition Input Conditioning, Precision DC Voltage Buffering, Motor and Control-System Interfaces.
Industrial Sensor Signal Conditioning
The LM324ADRE4 is well suited to conditioning low-frequency sensor signals because four general-purpose amplifier sections are integrated into one 14-pin SOIC. According to the manufacturer family documentation, the device provides a 1.2 MHz gain-bandwidth product and accepts supplies from ±1.5 V to ±16 V. A typical signal chain can use separate channels for sensor amplification, active filtering, level translation, and output buffering. The 0.5 V/us slew rate supports moderate-amplitude signals without requiring a high-speed amplifier. Check the sensor output against the LM324 input common-mode range, because the LM324 is not a rail-to-rail-input amplifier. Verify output swing and capacitive loading at the selected supply voltage, and connect unused inputs to a defined bias voltage rather than allowing them to float.
Рекомендуется
Low-Frequency Audio Preamplification
LM324ADRE4 can implement several stages of a low-frequency audio preamplifier, including input gain, active tone control, and output buffering. Its 1.2 MHz gain-bandwidth product gives useful bandwidth for audio-band signals, while the 0.5 V/us slew rate helps preserve large-amplitude transients better than a very slow precision-oriented amplifier. The four independent channels reduce the number of ICs needed for a multi-stage signal path. According to the Texas Instruments LMx24 family datasheet, the device supports ±1.5 V to ±16 V supplies, allowing it to operate from a split supply or a single-supply arrangement with appropriate input biasing. Headroom and output swing must be checked against the signal amplitude to prevent clipping, and feedback-component values should preserve the intended gain-bandwidth and stability behavior.
Рекомендуется
Active Audio-Crossover Filters
The LM324ADRE4 is suitable for building multi-stage active filters and crossover networks because its four channels support cascaded first- or second-order sections without requiring four separate packages. The 1.2 MHz gain-bandwidth product provides ample loop-gain range for common audio crossover frequencies, although component tolerances and the amplifier's actual gain-bandwidth response determine the final response. According to the manufacturer family documentation, the LM324 operates from ±1.5 V to ±16 V, so both split-supply and grounded single-supply implementations are possible. Keep input and feedback networks compact to minimize parasitic coupling, and verify signal levels so that the 0.5 V/us slew rate and output-current capability remain adequate. Place the input, output, and supply-ground connections according to the manufacturer pin-description table.
Рекомендуется
Data-Acquisition Input Conditioning
LM324ADRE4 can provide the gain, buffering, and differential stages used ahead of a data-converter input. Four channels allow an instrumentation-style signal to use one amplification section, one differential or summing section, and one output buffer, while a separate channel can support calibration or reference conditioning. According to the Texas Instruments LMx24 family datasheet, the 1.2 MHz gain-bandwidth product and 0.5 V/us slew rate are appropriate for many low- to moderate-bandwidth acquisition signals. The device is not rail-to-rail, so the sensor or converter input range must remain within its common-mode limits. Check DC offset, bias current, output swing, and settling time for the required acquisition rate, and maintain a low-impedance reference return to minimize conversion error and channel crosstalk.
Рекомендуется
Precision DC Voltage Buffering
The LM324ADRE4 can buffer high-impedance DC sources because each channel operates as a voltage follower when its inverting input is connected to the output. This is useful when a reference, divider, or sensor output must drive another circuit without loading the source. According to the manufacturer family documentation, the device operates from ±1.5 V to ±16 V and has a 1.2 MHz gain-bandwidth product, making it appropriate for slow-to-moderate bandwidth control and measurement paths. Input bias current and input offset voltage must be evaluated when the source impedance is high, since either effect can create meaningful DC error. The LM324 is not rail-to-rail, so confirm that the buffered voltage lies inside the usable common-mode range and that the output swing provides adequate margin at the chosen supply voltage.
Рекомендуется
Motor and Control-System Interfaces
LM324ADRE4 can implement low-frequency control and interface functions such as error amplification, command scaling, current-sense amplification, and comparator-style threshold detection. Its four channels make it practical to centralize these functions in a control board, while the 1.2 MHz gain-bandwidth product is adequate for many slow feedback loops. According to the Texas Instruments LMx24 family datasheet, the supported supply range is ±1.5 V to ±16 V, which supports common industrial signal levels. The amplifier should not directly drive a power MOSFET or motor without an appropriate driver stage. Check common-mode range, output swing, slew rate, and output-current requirements, and keep feedback routing away from motor-switching nodes to reduce switching-noise pickup and false comparator transitions.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LM324ADRE4 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LM324ADR | LM324KAD | LM324KADRG4 | LM324A | LM324B |
|---|---|---|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain-Bandwidth Product | 1.2 MHz | 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 | 0.5 V/us |
| Supply Voltage Range | ±1.5 V to ±16 V | ±1.5 V to ±16 V | ±1.5 V to ±16 V | ±1.5 V to ±16 V | ±1.5 V to ±16 V | ±1.5 V to ±16 V |
| Operating-Amplifier Class | General purpose | General purpose | General purpose | General purpose | General purpose | General purpose |
| Single-Supply Operation | Supported with V- grounded within common-mode limits | Supported with V- grounded within common-mode limits | Supported with V- grounded within common-mode limits | Supported with V- grounded within common-mode limits | Supported with V- grounded within common-mode limits | Supported with V- grounded within common-mode limits |
Ключевые отличия
- Four general-purpose amplifiers integrated in one standard SOIC (против LM324ADR)
- Documented manufacturer-family terminal and package compatibility (против LM324KAD)
- Multiple TI ordering options for assembly and qualification planning (против LM324KADRG4)
Заметки по проектированию
Route each amplifier's input and feedback components close to the associated SOIC pins to minimize parasitic capacitance, coupling, and feedback-loop area. Place input bypass capacitors near pins 4 and 11 and provide a short, low-impedance ground return. Because the LM324 contains four amplifiers in one package, isolate high-gain stages from sensitive inputs by grouping similar channels and maintaining separation between high-impedance input traces and switching or digital return paths.
Do not assume rail-to-rail input or output behavior. Verify that every input voltage remains inside the common-mode range and that each output retains adequate swing margin at the selected supply. Grounding pin 11 enables single-supply operation, but midpoint biasing or a suitable source signal is still needed for signals near ground. The 1.2 MHz gain-bandwidth product and 0.5 V/us slew rate should also be checked against the required gain, bandwidth, and signal amplitude.
Avoid connecting unused amplifier inputs to uncontrolled high-impedance nodes. Tie each unused non-inverting input to a defined reference within the input common-mode range, and configure the corresponding inverting input to follow that reference as a stable voltage follower. This prevents input bias currents from drifting through floating nodes and creating unintended voltages that may couple into adjacent channels. Confirm the final bias arrangement against the manufacturer pin-description table.
Информация о соответствии
The exact LM324ADRE4 ordering code was not explicitly associated with compliance declarations in the cited manufacturer and distributor records. Verify RoHS, REACH, lead-free, halogen-free, and conflict-minerals status for the exact package and reel suffix before release.