LM324D - Quad 36V Op Amp | Texas Instruments | SOIC-14 (Tape & Reel)
Référence : LM324D ✓ ActifLM324D Présentation
An operational amplifier is an analog amplifier used in the wider semiconductor hierarchy of integrated circuits and analog signal-processing devices. The LM324 family is commonly used for voltage buffering, sensor-interface conditioning, current-to-voltage conversion, audio paths, filters, and control loops. Its single-supply capability is useful when the signal and system share a common ground reference, while split-supply operation supports bipolar signals in applications where positive and negative rails are available.
Verified feature data identifies the LM324 family as a next-generation LM324B and LM2902B offering, with B versions intended as drop-in replacements for LM224, LM324, and LM2902 versions. The listed operating supply range is 3 V to 36 V. The family also includes versions with input offset voltage specified as low as plus or minus 2 mV, 2 kV HBM ESD protection for B, BA, and K versions, and internal RF and EMI filtering for B and BA versions. These features support general-purpose analog designs where supply tolerance and input conditioning matter.
The LM324D is packaged in the SOIC-14 footprint, making it suitable for conventional PCB assembly and educational, industrial-control, instrumentation, and embedded-control designs. The device is not a precision, rail-to-rail-input amplifier, so input common-mode range, output swing, input bias current, noise, slew rate, and stability behavior must be checked against the actual signal path. The four amplifiers share a package power supply but operate independently at their input, output, and feedback pins.
Typical uses include four-channel sensor buffering, low-frequency active filtering, audio preamplification, DC gain stages, comparator-style threshold conditioning with suitable feedback arrangements, and general embedded analog interfaces. When designing around the LM324D, verify the supply rails, keep input and feedback connections short, provide stable bypass capacitance near the supply pins, and account for the amplifier’s output-current and thermal limits. The manufacturer product page and datasheet are the authoritative sources for exact electrical limits and ordering information.
This page combines verified manufacturer and distributor links with application guidance and explicitly marks electrical details that were not supplied in the verified excerpts. The LM324D remains a practical choice when four general-purpose amplifiers, single-supply operation, and a standard SOIC-14 footprint are more important than precision or rail-to-rail performance.
Alternatives de remplacement direct pour LM324D — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM324D (même facteur de forme et même empreinte) — différant par Amplifier Type.
LM324BDR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LM324ADR2G
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →LM324D Valeurs maximales et caractéristiques électriques
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Amplifiers | 4 |
| Architecture | Four independent high-gain frequency-compensated operational amplifiers |
| Supply Voltage Range | 3 V to 36 V for B versions |
| Input Offset Voltage | Plus or minus 2 mV maximum for BA versions at 25 C |
| ESD Protection | 2 kV HBM for B, BA, and K versions |
| Input Filtering | Internal RF and EMI filter for B and BA versions |
| Supply Configuration | Single supply or split supply |
| Frequency Compensation | Internal |
| Boîtier | 14-pin SOIC |
| Type de montage | Surface mount |
| Device Type | Low-power operational amplifier |
| Input Type | Differential input |
| Type de sortie | Single-ended output |
| Operating Class | Standard general purpose |
Guide de configuration des broches du LM324D 14-pin soic
Configuration des broches du LM324D (boîtier 14-pin soic). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour LM324D.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM324D convient pour 6 applications: Four-Channel Sensor Conditioning, Industrial Analog Interfaces, Audio Signal Conditioning, Active Filters and Low-Frequency Controls, Embedded Control Analog Front Ends, Power-Supply Monitoring and Feedback.
Four-Channel Sensor Conditioning
LM324D fits low-frequency sensor-conditioning boards where four analog channels need buffering, gain, or active filtering in one SOIC-14 package. The verified family supply range of 3 V to 36 V for B versions gives the design room to operate from low-voltage logic or a higher analog rail, while internal frequency compensation supports general-purpose closed-loop use. Each amplifier can process one sensor, reducing package count and simplifying routing. Before finalizing, verify common-mode input range, input bias current, offset voltage, output swing, and ADC input limits against the sensor source impedance and signal amplitude.
Recommandé
Industrial Analog Interfaces
The LM324D is appropriate for general industrial analog interfaces that require multiple amplifier channels on a shared board. Its verified single-supply or split-supply operating concept and 3 V to 36 V B-version range make it useful for control and instrumentation blocks that must accommodate different supply arrangements. The four independent channels can implement voltage followers, gain stages, or first-order active filters. Layout should keep high-impedance inputs short, provide local supply bypassing, and route feedback traces away from noisy switching nodes to avoid degrading accuracy.
Recommandé
Audio Signal Conditioning
LM324D can support low-frequency audio preamplification, mixing, and buffering stages when the signal bandwidth does not require a high-speed audio amplifier. The four channels allow several gain or buffer functions to be combined in one standard SOIC-14 package, reducing board area. Because the verified data does not provide the exact noise, slew-rate, gain-bandwidth, and output-current figures, the designer must confirm that the intended audio bandwidth and load impedance remain within the family’s electrical limits. Decouple the supply pins and use short, shielded feedback paths to reduce noise pickup.
Recommandé
Active Filters and Low-Frequency Controls
LM324D is a practical candidate for first-order and modest low-frequency active-filter stages because the family provides four internally frequency-compensated amplifiers. One IC can implement multiple filter sections, buffer stages, or control-loop blocks while operating from a common supply. The 3 V to 36 V B-version supply range provides useful flexibility, but the exact gain-bandwidth product, slew rate, noise, and output capabilities were not included in the verified excerpts. Confirm stability at the intended gain, capacitor tolerances, signal amplitude, and load before production release.
Recommandé
Embedded Control Analog Front Ends
LM324D can serve embedded-control boards that need inexpensive, multi-channel conditioning for switches, dividers, transducers, and actuator feedback. The four-channel arrangement helps consolidate common analog tasks around a microcontroller or communications interface, while the 14-SOIC package is widely supported by conventional assembly methods. The device is best used when its input offset, bias current, common-mode range, and output swing are compatible with the sensed signal. Use a precision reference and appropriate filtering if the control loop requires accuracy beyond general-purpose performance.
Recommandé
Power-Supply Monitoring and Feedback
LM324D can be used in non-isolated monitoring and feedback circuits where several voltages or conditions need independent comparison, amplification, or signal shaping. The wide B-version supply range allows the amplifier to sit alongside higher-voltage monitoring circuitry when its absolute ratings are respected. The four channels can reduce the number of discrete amplifier packages, but the verified material does not provide the exact input protection, common-mode, slew-rate, or transient-response limits. Keep high-voltage nodes physically separated, verify absolute maximum ratings, and use resistor networks to limit fault current.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM324D — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM324BDR | LM324ADR | LM324D |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Amplifier Count | 4 | 4 | 4 | 4 |
Principaux différenciateurs
- Four integrated general-purpose amplifiers in one package (vs LM324BDR)
- Wide B-version supply capability (vs LM324ADR)
- Documented availability and starting price visibility (vs LM324BDR)
Notes de conception
Place the LM324D close to the signals it conditions and keep each non-inverting, inverting, and feedback route short. Separate sensitive input traces from switching nodes and power inductors. Because the device contains four amplifiers in one SOIC-14 package, maintain consistent grounding and route each feedback loop locally rather than creating long shared paths between channels.
Add local supply bypass capacitance near the device power pins and verify the selected capacitors against the supply voltage and application stability requirements. The verified family supports single- or split-supply operation and a 3 V to 36 V B-version range, but the exact decoupling and transient requirements must be taken from the manufacturer datasheet. Confirm startup, output settling, and load behavior at the actual supply voltage.
Do not treat the LM324D as a precision or automatically rail-to-rail-input amplifier. Check input common-mode range, output swing, input bias current, offset voltage, gain-bandwidth product, slew rate, and maximum output current before finalizing a signal path. For sensor inputs with high source impedance or measurements requiring low offset, use appropriate bias compensation, filtering, or a more precise amplifier instead.
Calculate amplifier dissipation from the actual supply voltage, output voltage, load current, and quiescent current using Pdiss approximately equal to (VIN minus VOUT) multiplied by ILOAD plus quiescent power. The verified excerpts do not provide package thermal resistance or maximum output current, so no final temperature rise can be stated. Validate the result against the datasheet limits and the PCB copper available around the SOIC-14 package.
Informations de conformité
The supplied verified excerpts identify the family and features but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Verify these attributes using the current manufacturer product documentation and applicable distributor declarations.