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Texas Instruments LM324NE4
- Part No.:
- LM324NE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM324NE4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,393
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Product details
Overview
LM324NE4 from Texas Instruments is a quad operational amplifier in 14-pin PDIP package, designed for cost-sensitive single-supply applications. It delivers rail-to-rail input (V– to V+ – 1.5V), ±3mV max input offset voltage at 25°C, 1.2MHz gain-bandwidth product, and 240µA typical quiescent current per amplifier - enabling precision signal conditioning in power supplies and industrial control systems.
For engineers reviewing the LM324NE4 datasheet, LM324NE4 pinout, LM324NE4 application, or LM324NE4 equivalent, this page provides verified electrical specs, validated PDIP-14 pin functions, real-world use cases in AC inverters and UPS systems, and two confirmed drop-in alternatives with documented parameter trade-offs.
Technical Context
The LM324NE4 implements four independent high-voltage op-amps in a single monolithic IC, each featuring common-mode input range extending to the negative rail (V–) and output swing within 1.5V of the positive rail under 1mA load. Its internal architecture supports unity-gain stability without external compensation.
It operates across 3V to 30V supply range (single- or split-rail), sustains input differential voltages up to ±32V, and maintains functional performance over 0°C to +70°C ambient temperature - matching legacy LM324 specifications while retaining full compatibility with existing designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Amplifier Count | 4 independent op-amps in one IC - reduces board space and BOM count vs discrete solutions |
| Supply Voltage Range | 3V to 30V - supports wide-input industrial power rails and battery-backed systems |
| Input Offset Voltage (max) | ±3mV at 25°C - enables accurate DC-coupled amplification in sensor front-ends |
| Gain-Bandwidth Product | 1.2MHz - sufficient for anti-aliasing filters, active RC networks, and slow-control loops |
| Quiescent Current (per amp) | 240µA typical - allows low-power operation in always-on monitoring circuits |
| Output Swing (from rail) | 1.5V from V+ / 100mV from V– at 50µA - accommodates single-supply signal processing near ground |
| Common-Mode Input Range | V– to (V+ – 1.5V) - accepts inputs down to ground in single-supply configurations |
Pinout & Package
LM324NE4 uses the 14-pin Plastic Dual In-line Package (PDIP, N package), measuring 19.3mm × 9.4mm, with through-hole mounting and industry-standard lead spacing (0.300" row-to-row).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Unused internal nodes - must remain unconnected to avoid parasitic coupling |
| 2 | Inverting Input (Amp 1) | Negative feedback node for first op-amp - sets gain and stability in inverting configurations |
| 3 | Non-Inverting Input (Amp 1) | Reference input for first op-amp - used in buffer, comparator, or non-inverting amplifier topologies |
| 4 | VCC+ | Positive supply rail - connects to main system voltage (3–30V); decoupling capacitor required |
| 6 | Non-Inverting Input (Amp 2) | Reference input for second op-amp - isolated from Amp 1 for multi-channel signal paths |
| 9 | Inverting Input (Amp 2) | Negative feedback node for second op-amp - enables independent gain setting per channel |
| 10 | Output (Amp 2) | Amplified output of second op-amp - drives loads up to 1mA with <1.5V headroom to V+ |
| 12 | Output (Amp 3) | Amplified output of third op-amp - shares same VCC+/VCC– rails but electrically isolated |
| 13 | Inverting Input (Amp 3) | Negative feedback node for third op-amp - supports cascaded filtering or summing networks |
| 14 | Output (Amp 4) | Amplified output of fourth op-amp - completes quad functionality for multi-sensor interfaces |
| VCC– (Pin 11) | Negative Supply / Ground | Lowest potential reference - tied to system ground in single-supply mode; enables rail-to-rail input |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Accepts signals from V– to (V+ – 1.5V), eliminating level-shifting needs in 0V-referenced sensor circuits |
| Unity-gain stable operation | Operates reliably at gain = 1 without external compensation - simplifies design of buffers and followers |
| High ESD robustness | 500V HBM rating - withstands handling in standard manufacturing environments without special precautions |
| Low quiescent current | 240µA per amplifier enables battery-powered or energy-harvesting applications with extended runtime |
| Four independent amplifiers | Integrates full signal-chain functionality (e.g., sensor gain, filter, reference buffer, comparator) in one package |
Applications
| Power Supply Monitoring | Industrial Motor Control |
|---|---|
Use Scenario: Real-time voltage/current sensing in AC-DC and DC-DC converters for overvoltage/overcurrent protection. IC Role / Device Role / Timing Role: Configured as precision difference amplifier and comparator to monitor rail integrity and trigger shutdown logic. Use Value: ±3mV offset ensures detection of <1% deviation from nominal output, improving PSU reliability and safety compliance. | Use Scenario: Closed-loop speed and torque regulation in HVAC blower motors and pump drivers. IC Role / Device Role / Timing Role: Signal conditioning for Hall-effect rotor position feedback and analog current loop scaling. Use Value: 1.2MHz GBW supports >10kHz control loop bandwidth, enabling fast transient response in variable-frequency drives. |
| Uninterruptible Power Supply (UPS) | Home Appliance Control |
Use Scenario: Battery voltage monitoring, inverter output waveform shaping, and line-failure detection in standby UPS units. IC Role / Device Role / Timing Role: Multi-function block: battery SOC estimator (integrator), sine-wave reference generator (active filter), and zero-crossing detector. Use Value: Single-supply operation (3–30V) allows direct interface with 12V/24V battery banks and eliminates dual-rail generation overhead. | Use Scenario: Temperature, water-level, and drum-speed sensing in washing machines and refrigerators. IC Role / Device Role / Timing Role: Front-end amplifier for NTC thermistors and pressure transducers, followed by analog-to-digital conversion. Use Value: 0°C to +70°C operating range matches appliance environmental requirements, avoiding derating or thermal management complexity. |
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, ±7mV max offset voltage (vs ±3mV for LM324NE4) | Higher offset limits accuracy in precision DC measurement; otherwise functionally interchangeable | Select LM324N only when cost is primary constraint and ±7mV offset is acceptable for target signal chain |
| LM2902N | Same footprint and pinout, wider temp range (–40°C to +125°C), ±7mV max offset, 30V max supply | Required for automotive or extended-temperature industrial deployments where LM324NE4's 0°C–70°C range is insufficient | Choose LM2902N when operating ambient exceeds 70°C or automotive qualification (AEC-Q100) is needed |
Compared with LM324N and LM2902N, the LM324NE4 offers tighter offset voltage than LM324N and lower cost than LM2902N, making it optimal for commercial-grade power supplies and appliances operating within 0°C–70°C.
Availability
LM324NE4 is available at Aetrix Electronics and suitable for merchant network power supplies, desktop PC motherboards, and indoor air conditioners requiring stable component supply and long-term production continuity.
Supply support for LM324NE4 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 delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.
The LM324 family was engineered for cost-sensitive, general-purpose analog signal conditioning - prioritizing ease of use, wide supply flexibility, and proven reliability in high-volume commercial electronics.
FAQ
What is the maximum supply voltage for LM324NE4?
The LM324NE4 supports a maximum supply voltage of 30V across its VCC+ and VCC– pins. This rating applies to both single-supply (e.g., 0V and +30V) and split-supply (e.g., ±15V) configurations. Exceeding 30V risks permanent damage per absolute maximum ratings in the TI datasheet. The LM324NE4 operates reliably from 3V to 30V, making it suitable for 24V industrial rails and 12V battery systems.
Does LM324NE4 support rail-to-rail output swing?
No, the LM324NE4 does not provide rail-to-rail output swing. Its output can swing within approximately 1.5V of the positive supply (V+) and 100mV of the negative supply (V–) under light load (50µA). At 1mA load, the high-side swing degrades to ~1.6V below V+, and low-side rises to ~0.75V above V–. This limitation must be accounted for in single-supply designs where signals approach supply rails - the LM324NE4 requires ≥1.5V headroom on V+ for full-scale output fidelity.
What is the operating temperature range of LM324NE4?
The LM324NE4 is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with typical desktop PC, printer, and home appliance environments. It is not rated for extended industrial (–40°C to +125°C) or automotive use - for those conditions, TI recommends LM2902N or LM2902B variants. Thermal derating is not defined beyond +70°C, and functionality outside this range is not guaranteed.
Can LM324NE4 replace LM324N in existing designs?
Yes, the LM324NE4 is a direct drop-in replacement for LM324N in PDIP-14 sockets. Both share identical pinout, package dimensions, electrical specifications (including ±3mV max offset), and recommended operating conditions. The "E4" suffix denotes TI's enhanced manufacturing flow and updated quality screening - no layout or schematic changes are required. System-level validation is still recommended to confirm performance under actual load and temperature conditions.
What is the input bias current specification for LM324NE4?
The LM324NE4 exhibits a maximum input bias current of –35nA at 25°C, with a worst-case value of –60nA across its 0°C to +70°C operating range. This bipolar-input architecture results in negative bias current flowing *into* the input terminals. Designers must account for this polarity when calculating offset errors in high-impedance source networks - for example, a 100kΩ source resistance contributes up to 6µV additional offset (60nA × 100kΩ) at worst case.
LM324NE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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
LM324NE4 FAQ
1.How can I place an order for LM324NE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324NE4 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 LM324NE4 reliable?
The price and inventory of LM324NE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324NE4 is usually 5 days.
3.What payment methods are accepted for LM324NE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324NE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324NE4?
LM324NE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324NE4 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 LM324NE4?
For technical support, including LM324NE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324NE4 requirements.
6.How does Aetrix verify that LM324NE4 is sourced from the original manufacturer or authorized distributors?
All LM324NE4 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 LM324NE4 meets industry standards.
7.What is the process for return or replacement of LM324NE4?
All LM324NE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM324NE4, 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 LM324NE4 part is unused and in its original packaging.
Return procedure for LM324NE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324NE4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
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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