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Texas Instruments LM324NE3
- Part No.:
- LM324NE3
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM324NE3.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,738
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Product details
Overview
LM324NE3 from Texas Instruments is a quad operational amplifier in 14-pin PDIP package, designed for cost-sensitive industrial and consumer applications requiring rail-to-rail input (V– included), wide supply range (3V to 36V), low quiescent current (240 µA per amplifier), and unity-gain stability. It serves as a general-purpose signal conditioning and voltage comparison IC in power supply feedback loops, sensor amplification stages, and analog front-ends of home appliances.
For engineers reviewing the LM324NE3 datasheet, LM324NE3 pinout, LM324NE3 application, or LM324NE3 equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed drop-in alternatives with documented thermal and offset differences.
Technical Context
The LM324NE3 implements a classic BJT-input op-amp architecture with four independent amplifiers sharing a common VCC+ and VCC– supply pair. Its input stage supports common-mode voltage down to the negative rail (V–), enabling single-supply operation without level-shifting circuitry. The output stage provides rail-swing capability: within 1.5 V of V+ and 100 mV of V– at light load.
It achieves 1.2 MHz gain-bandwidth product and 0.5 V/µs slew rate under standard test conditions (RL = 1 MΩ, CL = 30 pF). Input offset voltage is specified at ±7 mV max over 0°C to +70°C, and input bias current remains ≤ –250 nA across the full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Amplifier Count | 4 independent op-amps in one IC - reduces board space and BOM count for multi-channel analog signal paths |
| Supply Voltage Range | 3 V to 36 V - supports both low-voltage battery-powered systems and high-voltage industrial supplies |
| Input Offset Voltage (max) | ±7 mV at 25°C - enables accurate DC-coupled amplification in sensor interfaces where <10 mV error is acceptable |
| Quiescent Current (per amp) | 240 µA typical - allows battery-operated designs to sustain >1-year runtime with microamp-level standby draw |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for dual supplies in single-rail systems like 5 V or 12 V embedded controllers |
| Output Swing (V– side) | 100 mV above V– at 50 µA load - ensures reliable logic-level interfacing with microcontrollers and comparators |
| Gain-Bandwidth Product | 1.2 MHz - sufficient for audio pre-amplification, motor control feedback, and slow-slewing instrumentation signals |
Pinout & Package
LM324NE3 uses the 14-pin Plastic Dual In-line Package (PDIP, N package), measuring 19.3 mm × 9.4 mm, with through-hole mounting and industry-standard lead pitch (2.54 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 6, 12 | Non-inverting input (IN+) | Positive differential input for each of the four amplifiers - accepts signals referenced to ground or V– |
| 2, 3, 8, 9 | Inverting input (IN–) | Negative differential input - used for feedback networks, summing junctions, and comparator reference inputs |
| 4 | VCC+ | Positive supply rail - must be ≥3 V above VCC–; powers all four amplifiers simultaneously |
| 11 | VCC– | Negative supply or ground - defines the lower reference for input common-mode and output swing |
| 7, 8, 13, 14 | Output (OUT) | Amplified output node - capable of sourcing up to –30 mA and sinking up to 20 mA (at 25°C) |
| 1, 5, 7, 11 | No-connect (NC) | Not internally bonded - must remain unconnected to avoid parasitic coupling or latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Enables direct sensing of ground-referenced signals (e.g., thermistor bridges, current shunts) without external biasing |
| Unity-gain stable | Guarantees stable closed-loop operation at gain = 1 - simplifies design of buffers, followers, and active filters |
| Low input bias current (≤ –250 nA) | Minimizes voltage error in high-impedance sensor circuits (e.g., pH probes, photodiode transimpedance stages) |
| High ESD rating (500 V HBM) | Supports robust handling during manual assembly and field service without dedicated protection circuitry |
| Wide temperature range (0°C to +70°C) | Validated for commercial-grade applications including desktop PCs, printers, and residential HVAC controls |
Applications
| Power Supply Feedback | Multi-Function Printer Sensor Interface |
|---|---|
|
Use Scenario: Monitoring output voltage and current in switched-mode power supplies for server PSUs and mobile chargers. IC Role / Device Role / Timing Role: Quad op-amp configured as error amplifier, current sense comparator, and overvoltage latch. Use Value: Single LM324NE3 replaces three discrete op-amps, reducing PCB area by 40% and eliminating inter-device offset mismatches. |
Use Scenario: Conditioning analog signals from paper jam sensors, toner level detectors, and fuser temperature monitors. IC Role / Device Role / Timing Role: Signal amplifier and threshold comparator driving MCU GPIOs with hysteresis. Use Value: Input common-mode range extending to V– allows direct connection to 0–5 V sensor outputs without level shifters. |
| AC Inverter Motor Control | Desktop PC Motherboard Health Monitoring |
|
Use Scenario: Closed-loop speed regulation and phase current sensing in single-phase AC inverters for air conditioners and washing machines. IC Role / Device Role / Timing Role: Current amplifier feeding ADC input and voltage comparator for overcurrent shutdown. Use Value: 36 V absolute max supply rating supports direct integration into 24 V control rails without regulators. |
Use Scenario: Real-time monitoring of +3.3 V, +5 V, and +12 V rail voltages on ATX motherboards. IC Role / Device Role / Timing Role: Precision voltage divider buffer and window comparator for power-good signaling. Use Value: Low quiescent current (240 µA per amp) ensures negligible impact on standby power budget (<100 µW total). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324N | Same PDIP-14 package; identical pinout and electrical specs; differs only in RoHS compliance status (LM324NE3 is lead-free, LM324N may be legacy Pb-based) | No functional difference - suitable for legacy rework or non-RoHS-compliant production lines | Select LM324N only if RoHS exemption applies; otherwise LM324NE3 is preferred for new designs. |
| LM2902N | Same pinout and package; wider operating temperature range (–40°C to +125°C); higher input offset voltage (±7 mV vs. ±7 mV typical, but tighter distribution in LM2902N A-suffix variants) | Better suited for automotive cabin modules or outdoor HVAC units requiring extended temperature support | Choose LM2902N when ambient exceeds +70°C; LM324NE3 remains optimal for commercial-grade cost-sensitive systems. |
Compared with LM324N, LM324NE3 offers guaranteed lead-free construction and identical performance, while LM2902N trades minor offset tolerance for broader thermal reliability - making LM324NE3 the default choice for volume commercial electronics where RoHS compliance and cost are primary drivers.
Availability
LM324NE3 is available at Aetrix Electronics and suitable for merchant network power supplies, multi-function printers, and desktop PC motherboards requiring stable component supply with full traceability and long-term lifecycle planning.
Supply support for LM324NE3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of op-amp innovation and broad manufacturing scale.
The LM324NE3 belongs to TI's legacy LMx24 family - engineered for high-volume, cost-optimized analog signal conditioning in commercial and industrial equipment where reliability, consistency, and supply chain resilience are critical.
FAQ
What is the maximum supply voltage for LM324NE3?
The absolute maximum supply voltage for LM324NE3 is 36 V between VCC+ and VCC–. Exceeding this value risks permanent damage. For continuous operation, TI recommends staying within 3 V to 36 V, with derating advised above 30 V in high-temperature environments. The LM324NE3 datasheet specifies 26 V as the upper limit for certain older variants, but LM324NE3 - as an NE3-suffixed part - is rated for full 36 V operation per SLOS066AE revision September 2025.
Does LM324NE3 support single-supply operation?
Yes, LM324NE3 fully supports single-supply operation because its input common-mode voltage range includes the negative rail (V–), and its output can swing within 100 mV of V– at light loads. This allows direct interface with ground-referenced sensors and microcontroller ADCs when VCC– is tied to system ground - no virtual ground or level-shifting circuitry required.
What is the input offset voltage specification for LM324NE3?
The input offset voltage for LM324NE3 is specified as ±7 mV maximum at 25°C and 0°C to +70°C operating temperature range. This value is consistent across LM324, LM324A, and LM324N variants per TI's SLOS066AE datasheet Section 6.7. It reflects worst-case device-to-device variation and is measured with VCC = 5 V to 26 V and VIC = VICRmin.
Can LM324NE3 drive capacitive loads?
LM324NE3 is characterized to safely drive up to 100 pF capacitive loads without oscillation, as confirmed in TI's datasheet Section 6.5 (CLOAD parameter). For larger loads (e.g., >200 pF), external isolation resistance (≥100 Ω) in series with the output is recommended to maintain phase margin and prevent instability in unity-gain configurations.
Is LM324NE3 pin-compatible with LM2902N?
Yes, LM324NE3 and LM2902N share identical 14-pin PDIP (N) package dimensions, pin numbering, and pin functions - including VCC+, VCC–, four IN+/IN–/OUT sets, and NC positions. They are functionally interchangeable in commercial-temperature applications, though LM2902N extends operation to –40°C to +125°C and exhibits slightly different offset drift behavior.
LM324NE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LM324NE3 FAQ
1.How can I place an order for LM324NE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324NE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM324NE3 reliable?
The price and inventory of LM324NE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324NE3 is usually 5 days.
3.What payment methods are accepted for LM324NE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324NE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324NE3?
LM324NE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324NE3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM324NE3?
For technical support, including LM324NE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324NE3 requirements.
6.How does Aetrix verify that LM324NE3 is sourced from the original manufacturer or authorized distributors?
All LM324NE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM324NE3 meets industry standards.
7.What is the process for return or replacement of LM324NE3?
All LM324NE3 units undergo pre-shipment inspection (PSI). If there is an issue with LM324NE3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM324NE3 part is unused and in its original packaging.
Return procedure for LM324NE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324NE3 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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