LM324DRE4 - Quad 1.2MHz Op Amp | Texas Instruments | SOIC-14
MPN: LM324DRE4 ✓ نشطLM324DRE4 نظرة عامة
An operational amplifier is an analog signal-processing IC that uses high open-loop gain and negative feedback to amplify voltage differences. The LM324 belongs to the general-purpose op-amp family, a versatile subset of amplifier ICs used for buffering, amplification, comparisons, summing, filtering, and control applications. Its four independent sections allow one package to implement several analog functions without requiring four separate single-amplifier packages.
The headline operating characteristics include a 1.2 MHz gain-bandwidth product, 0.5 V/us slew rate, and 0.8 mA typical supply-current drain. The 14-pin SOIC package measures 3.90 mm in body width and supports conventional surface-mount assembly. Each amplifier is internally frequency compensated, allowing operation as a closed-loop amplifier without external compensation components in standard configurations.
LM324-family devices are designed for broad supply-voltage operation and can also work with positive and negative supplies. Their low quiescent current and ground-referenced common-mode input capability are useful in sensor interfaces powered from a single rail. The amplifier sections operate independently, although sharing the same package provides common supply and ground pins.
Typical uses include low-frequency sensor signal conditioning, buffered analog inputs, DC voltage amplification, comparator-style threshold circuits, audio preamplification, and low-frequency active filters. Because the LM324 is intended for general-purpose, low-bandwidth signal conditioning rather than high-speed precision work, system design should account for its 1.2 MHz gain-bandwidth product and 0.5 V/us slew rate.
A practical design consideration is common-mode and output range: an input or output operating point must remain inside the amplifier's usable voltage range. Place supply-bypass capacitors close to the supply and ground pins, and route sensitive input traces away from switching nodes and high-current return paths.
This page combines package and application guidance with a focused replacement analysis, helping engineers distinguish electrical-compatible alternatives from merely similar quad op-amp families before committing a design to the SOIC-14 footprint.
بدائل مباشرة لـ LM324DRE4 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LM324DRE4 (نفس عامل الشكل والبصمة) — يختلف في Package, Slew Rate, Amplifier Type, Gain-Bandwidth Product, Input Offset Voltage.
LM324DR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM324KDR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM324ADR2G
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM324AMX/NOPB
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM324DT
✅ بديل مباشر✗ غير متوفر
$0.0827 / وحدة
عرض ورقة البيانات ←LM324DRE4 الحدود القصوى والخصائص الكهربائية
| Amplifier Count | 4 amplifiers |
| Operational Amplifier Type | Quad general-purpose operational amplifier |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/us |
| Typical Supply Current | 0.8 mA |
| Single-Supply Operation | Supported |
| Split-Supply Operation | Supported |
| Frequency Compensation | Internal |
| Common-Mode Input Range | Includes ground |
| Supply Current Dependence | Independent of supply voltage |
| العلبة | 14-SOIC, 3.90 mm body width |
| نوع التركيب | Surface mount |
تكوين أطراف LM324DRE4
| دبوس 1 | OUT1 — Amplifier 1 output |
| دبوس 2 | IN1- — Amplifier 1 inverting input |
| دبوس 3 | IN1+ — Amplifier 1 non-inverting input |
| دبوس 4 | GND — Ground connection |
| دبوس 5 | IN2+ — Amplifier 2 non-inverting input |
| دبوس 6 | IN2- — Amplifier 2 inverting input |
| دبوس 7 | OUT2 — Amplifier 2 output |
| دبوس 8 | OUT3 — Amplifier 3 output |
| دبوس 9 | IN3- — Amplifier 3 inverting input |
| دبوس 10 | IN3+ — Amplifier 3 non-inverting input |
| دبوس 11 | GND — Ground connection |
| دبوس 12 | IN4+ — Amplifier 4 non-inverting input |
| دبوس 13 | IN4- — Amplifier 4 inverting input |
| دبوس 14 | OUT4 — Amplifier 4 output |
التطبيقات النموذجية
LM324DRE4 مناسب لـ 6 التطبيقs: Low-Frequency Sensor Signal Conditioning, Audio Preamplifier and Mixer, Industrial Control and Threshold Conditioning, Portable Battery-Powered Instrumentation, Low-Frequency Active Filtering, Communications and Interface Conditioning.
Low-Frequency Sensor Signal Conditioning
The LM324DRE4 is suitable for buffering and modest-gain conditioning of low-frequency sensor outputs when the signal is referenced close to ground. Its common-mode input range includes ground, while internal frequency compensation simplifies the amplifier stages. A designer can use one section as a unity-gain buffer and another as a gain stage, reducing the need for separate single-op-amp packages. The 1.2 MHz gain-bandwidth product supports conventional sensor bandwidths rather than high-speed sensing, and the 0.5 V/us slew rate should be checked against the required output transition rate. Supply bypassing and careful grounding are essential because high-impedance sensor nodes can couple switching noise directly into the measurement chain.
موصى به
Audio Preamplifier and Mixer
The four independent LM324DRE4 amplifier sections can implement low-frequency audio preamplification, summing, or small-signal mixing stages on a single supply. Its ground-referenced common-mode capability is useful for audio signals centered near the lower rail, and the 1.2 MHz gain-bandwidth product covers conventional voice-band signal paths. Each section must preserve its own feedback network while sharing the package supply and ground. The main limitation is the 0.5 V/us slew rate, which should be compared with the largest expected signal swing and load. For high-fidelity or high-output designs, verify output swing and distortion limits against the exact LM324 datasheet.
موصى به
Industrial Control and Threshold Conditioning
The LM324DRE4 can condition slow control signals, level-shift compatible analog thresholds, or generate control feedback in industrial systems with a single low-voltage supply. Its four independent channels allow local conditioning near several sensors or actuators without routing fragile signals across a large board. The common-mode input range including ground supports inputs near the supply's lower rail, a common arrangement in 3.3 V and 5 V control electronics. Internal frequency compensation makes conventional voltage-feedback configurations straightforward, although the 1.2 MHz bandwidth and 0.5 V/us slew rate favor slow feedback and sensor signals. The design should include grounding, input filtering, and separation from high-current switching stages.
موصى به
Portable Battery-Powered Instrumentation
The LM324DRE4 fits portable instrumentation because it combines four amplifier sections with typically 0.8 mA supply-current drain that is largely independent of supply voltage. The SOIC-14 package supports compact surface-mount layouts, while the amplifier's ability to operate from a single supply simplifies power architecture. Typical uses include low-frequency sensor amplifiers, excitation buffering, and data-acquisition input conditioning. The common-mode input range includes ground, which helps when the transducer output sits near the negative rail. Designers should still calculate total board power, use a low-noise regulator if the signal path demands it, and ensure that the 1.2 MHz bandwidth is sufficient. Decoupling capacitors should be placed directly between the supply and ground pins.
موصى به
Low-Frequency Active Filtering
Each LM324DRE4 amplifier section can implement the active stage of a low-frequency filter, such as a first-order active low-pass, high-pass, or smoothing network. The 1.2 MHz gain-bandwidth product provides ample loop gain for audio-band and low-frequency instrumentation filters, while internal frequency compensation removes the need for a separate compensation capacitor in standard closed-loop use. Component tolerances and the amplifier's finite gain-bandwidth response determine the actual filter shape, so simulation with the final component values is advisable. The 0.5 V/us slew rate limits large-signal behavior and should be checked against the output waveform. Keep the filter away from switching supplies and use a stable reference plane for sensitive nodes.
موصى به
Communications and Interface Conditioning
The LM324DRE4 can provide slow analog conditioning around communications interfaces, including receive-path buffers, slow comparator functions, and level-compatible amplifier stages. The four independent channels support local placement near several interface nodes, reducing trace length and improving noise isolation. Its broad supply flexibility and ground-inclusive common-mode input range are useful in mixed-signal communication equipment. The device is best suited to low-frequency baseband or supervisory signals rather than RF or high-speed line-rate amplification, since the 1.2 MHz gain-bandwidth product and 0.5 V/us slew rate are modest. Designers should maintain separate return-current paths, place bypass capacitors at the package pins, and verify the interface's logic levels and required settling behavior.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM324DRE4 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM324DR | LM324KDR | LM324ADR | LM324AMX/NOPB | LM324 |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Count | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers |
| Frequency Compensation | Internal | Internal | Internal | Internal | Internal | Internal |
| Single-Supply Operation | Supported | Supported | Supported | Supported | Supported | Supported |
| Automotive Designation | No automotive designation in MPN | No automotive designation in MPN | No automotive designation in MPN | Automotive-related A-series designation | Automotive-related A-series designation | Base family designation |
أبرز الفروقات
- Four independent amplifier sections in one package (مقابلLM2904P3)
- Direct ordering-code match for the LM324D family (مقابلLM324AMX/NOPB)
- Ground-inclusive common-mode input range for single-supply sensing (مقابلTLV2402ID)
- Four channels with internal frequency compensation (مقابلLM2904P3)
ملاحظات التصميم
The LM324 family's typical supply-current drain is 0.8 mA and is largely independent of supply voltage. Treat that figure as a device-level baseline and add the load current from all four amplifier sections. Place a supply-bypass capacitor directly between the supply and ground pins, and keep the ground return path continuous beneath the device. For battery-powered designs, calculate the complete analog-chain consumption rather than relying only on the nominal op-amp current.
The 14-pin SOIC has separate amplifier sections but shared supply and ground connections. Route each feedback network close to its associated input and output pins to minimize parasitic feedback and oscillation risk. Keep high-impedance input traces short, avoid routing them beneath switching nodes, and use a quiet ground reference for single-supply applications. The input common-mode range includes ground, but the output must still remain within the usable output swing.
The 1.2 MHz gain-bandwidth product and 0.5 V/us slew rate make the LM324 suitable for conventional low-frequency signal paths rather than wideband waveform generation. Check the closed-loop gain against the bandwidth available at that gain, and verify that the largest expected output step can be slewed without distortion. Add input filtering for sensor or communication nodes whose bandwidth is well below the amplifier bandwidth.
Do not assume that an input close to ground is always valid merely because the common-mode range includes ground. Output swing, output-current limits, stability with capacitive loading, and the selected supply limits must also be checked in the manufacturer datasheet. When replacing LM324DRE4, verify the exact suffix and pin configuration; an LM324-family label alone does not establish the same package, temperature grade, or qualification status.
معلومات الامتثال
The exact LM324DRE4 compliance declarations are not stated in the manufacturer page excerpt. The A-series ordering codes identify a related automotive family, but the standard LM324DRE4 is not treated as AEC-Q100 qualified.
