LM324DE4 - Quad 1.2MHz Op Amp, 14-SOIC | Texas Instruments
MPN: LM324DE4 ✓ ActiveLM324DE4 Overview
An operational amplifier is an amplifier IC that uses high open-loop gain and negative feedback to control gain accurately. The LM324 family combines four general-purpose amplifier channels with internal biasing, allowing each channel to operate without external bias-current compensation in typical applications. Within the semiconductor hierarchy, it belongs to the operational-amplifier, analog-amplifier, analog-IC, and integrated-circuit categories.
The four internal channels can be configured as voltage followers, non-inverting or inverting amplifiers, summers, differential amplifiers, filters, comparators, and current-to-voltage converters. A 1.2 MHz gain-bandwidth product is appropriate for audio-frequency and general feedback-control circuits, while the 0.5 V/µs slew rate limits how quickly large voltage changes can be reproduced. The manufacturer datasheet identifies the device as a general-purpose amplifier with four circuits and a 14-pin SOIC package.
The architecture makes efficient use of board area by placing four amplifiers in one package. Rail-to-rail output operation and the broad supply range allow the device to operate from single or dual supplies within the stated limits. Its 0.8 mA typical current drain is useful for low-power analog systems, although actual supply current depends on the number of active channels and load conditions. The package is suitable for conventional surface-mount PCB assembly.
Typical LM324DE4 applications include audio preamplification, sensor signal conditioning, DC motor-control support circuits, battery-powered instrumentation, general-purpose filters, and active control loops. In multi-channel designs, the common package simplifies routing and inventory management while keeping each amplifier electrically independent. The amplifier should be selected when low bandwidth is acceptable and when a cost-conscious general-purpose implementation is more important than high-speed or low-noise performance.
Design with adequate input common-mode range, output-current capability, and supply headroom. Decoupling capacitors should be placed close to the supply pins, and output loads must remain within the package and device thermal limits. Because the LM324DE4 is supplied in a tube, PCB assembly processes must support tube-fed components or require an approved conversion step before placement.
This product page consolidates the exact LM324DE4 electrical and package specifications, verified same-package replacement information, a parameter comparison, application guidance, and practical PCB design notes. It is intended to accelerate component selection while preserving the distinction between exact-orderable versions and broader LM324-family devices.
Drop-in alternatives for LM324DE4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM324DE4 (same form factor and footprint) — differing in Package, Amplifier Type, Number of Amplifiers, Slew Rate.
LM324DRG4
✅ Drop-InContact for price
View Datasheet →LM324DRE4
✅ Drop-InContact for price
View Datasheet →LM324DR
✅ Drop-InContact for price
View Datasheet →LM324DE4 Maximum Ratings & Electrical Characteristics
| Amplifier Type | General Purpose |
| Number of Amplifiers | 4 circuits |
| Number of Channels | 4 channels |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/µs |
| Minimum Single-Supply Voltage | 1.5 V |
| Maximum Single-Supply Voltage | 16 V |
| Minimum Dual-Supply Voltage | ±1.5 V |
| Maximum Dual-Supply Voltage | ±16 V |
| Typical Supply Current | 0.8 mA |
| Package | 14-SOIC, 3.90 mm width |
| Pin Count | 14 pins |
| Mounting Type | Surface Mount |
| Packaging | Tube |
LM324DE4 Pin Configuration
| Pin 1 | OUT 1 — Amplifier 1 output |
| Pin 2 | IN 1- — Amplifier 1 inverting input |
| Pin 3 | IN 1+ — Amplifier 1 non-inverting input |
| Pin 4 | GND — Ground connection |
| Pin 5 | IN 2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN 2- — Amplifier 2 inverting input |
| Pin 7 | OUT 2 — Amplifier 2 output |
| Pin 8 | OUT 3 — Amplifier 3 output |
| Pin 9 | IN 3- — Amplifier 3 inverting input |
| Pin 10 | IN 3+ — Amplifier 3 non-inverting input |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IN 4- — Amplifier 4 inverting input |
| Pin 13 | IN 4+ — Amplifier 4 non-inverting input |
| Pin 14 | OUT 4 — Amplifier 4 output |
Typical Applications
LM324DE4 is suitable for 6 applications: General-Purpose Sensor Conditioning, Audio Preamplification and Mixing, Industrial Control and Feedback Loops, Active Filters and Signal Conditioning, Battery-Powered Instrumentation, Power-Supply Monitoring and Protection Support.
General-Purpose Sensor Conditioning
The LM324DE4 is appropriate for buffering and amplifying low-frequency sensor signals because each of its four channels provides a 1.2 MHz gain-bandwidth product and 0.5 V/µs slew rate. According to the Texas Instruments datasheet, the device operates from 1.5 V to 16 V on a single supply, allowing a sensor interface to share a compact 14-SOIC package. Place one channel in a non-inverting or differential configuration, verify the sensor output against the input common-mode range, and keep the output swing within the selected supply rails. The broad bandwidth supports slow temperature, pressure, and position signals, although offset and noise must be checked against the required measurement accuracy.
Recommended
Audio Preamplification and Mixing
The LM324DE4 can support inexpensive audio preamplifier, summing, and mixing stages because its four channels provide 1.2 MHz gain-bandwidth product and 0.5 V/µs slew rate. According to the Texas Instruments datasheet, the amplifier supports single supplies from 1.5 V to 16 V and dual supplies from ±1.5 V to ±16 V. Independent channels allow several low-frequency audio paths to share one package, reducing board area compared with separate single amplifiers. Select the feedback network for the intended closed-loop gain, maintain output headroom, and check distortion and bandwidth requirements; this is a general-purpose part rather than a dedicated low-noise audio amplifier.
Recommended
Industrial Control and Feedback Loops
The LM324DE4 fits slow industrial feedback loops where four channels can implement error amplifiers, comparators, transconductors, and actuator-driver support stages. According to the Texas Instruments datasheet, its 1.2 MHz gain-bandwidth product and 0.5 V/µs slew rate provide useful bandwidth for low-bandwidth control systems, while the 14-SOIC package simplifies assembly. Keep the closed-loop network away from the amplifier’s stability limits, account for input common-mode range at startup, and provide output-current margin for the load. A 24 V industrial supply requires an intermediate regulator because the LM324DE4 maximum supply voltage is 16 V.
Recommended
Active Filters and Signal Conditioning
The LM324DE4 is suitable for first-order and moderate-order active-filter stages that operate within its 1.2 MHz gain-bandwidth product and 0.5 V/µs slew-rate limits. According to the Texas Instruments datasheet, the device can be supplied from 1.5 V to 16 V, allowing filter sections to run from low-voltage sensor systems or conventional dual-rail analog rails. Use separate channels for cascaded sections and place the feedback resistors and capacitors close to the relevant pins to reduce parasitic effects. Verify component tolerances, input common-mode range, output swing, and stability at the target signal frequency before treating the circuit as a precision filter.
Recommended
Battery-Powered Instrumentation
The LM324DE4 can serve low-frequency instrumentation powered from a low-voltage source because its minimum single-supply voltage is 1.5 V and typical supply-current drain is 0.8 mA. According to the Texas Instruments datasheet, four amplifier channels are integrated into one 14-SOIC package, reducing both board area and the number of separate amplifier components. The device can buffer inputs, create gain stages, and form basic conversion or control functions around sensors. Designers should account for the battery’s changing voltage, verify common-mode and output headroom at the minimum operating voltage, and avoid using the full supply range as usable output range.
Recommended
Power-Supply Monitoring and Protection Support
The LM324DE4 can implement threshold monitoring, overvoltage comparison, and feedback assistance in low-voltage power systems because it includes four independently usable amplifier channels. According to the Texas Instruments datasheet, the device operates from 1.5 V to 16 V, matching many regulated low-voltage rails while also accepting dual supplies. Use suitable feedback networks to create the required threshold, observe output-swing limits, and account for input offset when setting protection points. The LM324DE4 does not include overvoltage, undervoltage, or thermal shutdown functions of its own, so those protections must be implemented in the surrounding circuit.
Recommended
Recommended Products Summary
Engineering reference data for LM324DE4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM324DRG4 | LM324DRE4 | LM324DR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Number of Amplifiers | 4 circuits | 4 amplifiers | 4 amplifiers | 4 amplifiers |
| Gain-Bandwidth Product | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz |
| Slew Rate | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs |
| 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 |
| Typical Supply Current | 0.8 mA | 0.8 mA typical | 0.8 mA typical | 0.8 mA typical |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose |
| Pin Count | 14 pins | 14 pins | 14 pins | 14 pins |
| Orderable Configuration | Tube packaging | Tape-and-reel green configuration | Tape-and-reel configuration | Tape-and-reel configuration |
Key Differentiators
- Four integrated amplifier channels (vs LM324DRG4)
- Identical verified gain-bandwidth product (vs LM324DRE4)
- Identical verified slew rate (vs LM324DR)
- Tube-compatible ordering configuration (vs LM324DRG4)
Design Notes
Keep the LM324DE4 supply within its 1.5 V to 16 V single-supply or ±1.5 V to ±16 V dual-supply range. The usable output range is narrower than the supply range, so verify that both inputs and outputs remain inside the common-mode and output-swing limits. Place a local bypass capacitor at the positive supply and ground pins, with a short return path. For systems powered above 16 V, regulate the rail before the amplifier rather than relying on absolute-maximum tolerance.
Route the four channels to keep feedback resistors, compensation components, and signal inputs close to their associated SOIC pins. Decouple pin 11 to pin 4 with the shortest high-frequency loop practical, and connect the bypass capacitor ground directly to the device ground pin. Maintain clearance between adjacent input traces when they carry high-impedance sensor signals, because parasitic coupling can affect the low-bandwidth application. The 14-SOIC footprint provides adequate routing flexibility for general-purpose analog stages but does not eliminate the need for careful analog grounding.
Do not assume that the complete supply-voltage range is available at the output. Verify common-mode range and output swing at the actual supply voltage, especially near 1.5 V or 16 V. Also avoid using the nominal 1.2 MHz gain-bandwidth figure as a guaranteed closed-loop bandwidth without accounting for the selected noise gain. The 0.5 V/µs slew rate limits large-signal performance, so confirm that the required signal amplitude and frequency can coexist within that limit.
Treat each amplifier channel as a separate analog section even though all four share the same 14-SOIC package. Avoid routing unrelated high-current or switching signals between amplifier pins, and place input-side components away from power inductors and switching nodes. Use a continuous ground plane where practical and connect each bypass capacitor to the ground reference with minimal inductance. If the four channels process widely different signal frequencies or levels, check for crosstalk and supply-current interaction rather than assuming the channels are entirely unaffected by one another.
Compliance Information
The manufacturer materials identified by LM324DE4 do not explicitly state the requested compliance status. The suffix G4 identifies a green material configuration for LM324DRG4, but it should not be interpreted as a complete RoHS, REACH, halogen-free, or conflict-minerals declaration without the applicable manufacturer documentation.