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Texas Instruments LM324KAN
- Part No.:
- LM324KAN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM324KAN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
LM324KAN 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) and robust output drive (±20mA per amplifier). It operates from 3V to 30V single supply or ±15V dual supply, delivers 1.2MHz gain-bandwidth, 0.5V/μs slew rate, and achieves ±7mV max input offset voltage at 25°C.
For engineers reviewing the LM324KAN datasheet, LM324KAN pinout, LM324KAN application, or LM324KAN equivalent, this page provides verified electrical specifications, validated PDIP-14 pin functions, real-world use cases in power supplies and home appliances, and two confirmed drop-in alternatives with documented thermal and ESD differences.
Technical Context
The LM324KAN belongs to the legacy LM324 family-non-B version-with guaranteed operation across 0°C to +70°C ambient temperature and 3V to 30V supply range. Its input stage supports common-mode voltage down to V–, enabling true single-supply sensor interface without level-shifting. Output stage provides symmetrical sourcing/sinking capability up to ±20mA per op amp under 15V supply.
It features unity-gain stability, 120dB channel separation, and integrated EMI filtering absent in earlier LM324 variants. Unlike B/BA versions, LM324KAN does not include enhanced ESD protection (HBM = 500V), nor does it meet extended temperature grades (e.g., –40°C to +125°C) or low-offset BA-grade specs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V single supply - enables direct integration into 5V, 12V, and 24V systems without regulation |
| Input Offset Voltage (max) | ±7mV at 25°C - sets minimum detectable differential signal in precision DC-coupled amplifiers |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop gain up to ~120 at 10kHz for signal conditioning |
| Slew Rate | 0.5V/μs - limits full-scale step response time to ≥2μs for 1V transitions |
| Output Current (per amp) | ±20mA source/sink - drives 2kΩ loads directly without external buffers |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for negative bias in single-supply transducer interfaces |
| Quiescent Current (4 amps) | 0.7–1.2mA total - enables low-power operation in battery-backed or energy-conscious designs |
Pinout & Package
LM324KAN uses a 14-pin Plastic Dual In-line Package (PDIP, N package), 19.3mm × 9.4mm footprint, through-hole mountable with 2.54mm pitch. Designed for manual soldering and prototyping, it offers mechanical robustness and thermal dissipation suitable for ambient temperatures up to +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Unused internal die connections - must remain unconnected to avoid parasitic coupling |
| 2, 6, 9, 13 | Inverting Input (–) | Differential input node for each of four amplifiers; accepts signals down to V– |
| 3, 8, 10, 14 | Non-Inverting Input (+) | Differential input node; common-mode range includes V– for true single-supply operation |
| 1OUT (pin 1), 2OUT (pin 7), 3OUT (pin 8), 4OUT (pin 14) | Amplifier Output | Class-AB output stage capable of ±20mA drive into resistive loads |
| 4 (VCC+), 11 (VCC–) | Power Supply Rails | VCC+ = highest potential (e.g., +30V or +5V); VCC– = lowest (typically ground or –15V) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes V– (ground), enabling direct connection of sensors referenced to system ground |
| Unity-gain stable architecture | Guarantees stability with no external compensation required in follower or low-gain configurations |
| High channel separation (120dB) | Minimizes crosstalk between amplifiers sharing same die - critical in multi-channel data acquisition |
| Robust output short-circuit protection | Unlimited duration short-circuit to ground at TA ≤ 25°C and VCC ≤ 15V - enhances field reliability |
| Low quiescent current per amplifier | Typical 175–300μA per op amp - reduces system-level power budget in multi-amplifier designs |
Applications
| Power Supply Monitoring | Home Appliance Control |
|---|---|
Use Scenario: Real-time sensing of +12V and +5V rails in ATX PSUs and AC-DC adapters. IC Role / Device Role / Timing Role: Quad op amp configured as comparator and error amplifier for overvoltage/undervoltage detection and feedback loop stabilization. Use Value: Single LM324KAN replaces four discrete comparators, reducing BOM count and PCB area while maintaining ±7mV threshold accuracy. | Use Scenario: Motor speed control and temperature feedback in washing machines and refrigerators. IC Role / Device Role / Timing Role: Signal conditioning for thermistor and tachometer inputs; driving TRIAC gate drivers via buffered outputs. Use Value: Rail-to-rail input allows direct interface with grounded NTC sensors; ±20mA output drives opto-TRIAC inputs without external transistors. |
| Desktop PC Peripheral Interface | Industrial Sensor Signal Conditioning |
Use Scenario: Fan RPM monitoring and voltage margining on motherboard VRMs. IC Role / Device Role / Timing Role: Amplifying low-amplitude tach pulses and scaling analog sense voltages for ADC input. Use Value: 1.2MHz GBW ensures accurate pulse edge detection up to 100kHz; 0.5V/μs slew rate preserves rise/fall integrity. | Use Scenario: Amplification and filtering of 4–20mA loop signals and strain gauge bridges in HVAC controllers. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (with external resistors) and active low-pass filter stage. Use Value: Common-mode input range including V– simplifies single-supply bridge excitation; 120dB channel separation prevents cross-talk in multi-sensor nodes. |
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 electrical specs, but rated for 0°C to +70°C only - no K-suffix temperature screening | No guaranteed performance at upper end of commercial temp range; unsuitable where batch consistency at 70°C is required | Select LM324N only for non-critical, low-volume prototypes where LM324KAN's tighter temp screening is unnecessary |
| LM2902N | Same pinout and function, but specified for –40°C to +125°C operation and higher ESD rating (2kV HBM vs. 500V) | Valid for automotive and industrial environments requiring extended temperature compliance and ruggedness | Choose LM2902N when operating beyond 70°C or in high-ESD environments - requires no layout change |
Compared with LM324KAN, LM324N offers identical functionality at lower cost but lacks K-grade temperature screening, while LM2902N extends operating range and ESD robustness at the expense of slightly higher input offset (±7mV vs. ±7mV typical, but wider distribution).
Availability
LM324KAN is available at Aetrix Electronics and suitable for desktop PC motherboards, home appliance control boards, and industrial power supply units requiring stable component supply across long production lifecycles.
Supply support for LM324KAN 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 decades of heritage in precision op amps and broad industrial portfolio coverage.
The LM324 family was engineered for cost-effective, general-purpose amplification in commercial-grade equipment - prioritizing ease of use, wide supply tolerance, and proven reliability over ultra-low noise or rail-to-rail output.
FAQ
What is the maximum supply voltage for LM324KAN?
The absolute maximum supply voltage for LM324KAN is 32V, but its recommended operating range is 3V to 30V. Operation above 30V risks exceeding safe junction temperature and degrading long-term reliability. The device is commonly used at 5V, 12V, and 24V rails in power supplies and appliance control circuits, and LM324KAN maintains full specification compliance within this window.
Does LM324KAN support single-supply operation?
Yes, LM324KAN fully supports single-supply operation due to its input common-mode voltage range extending to V– (ground) and output swing within 1.5V of the rails. This allows direct interfacing with grounded sensors and microcontroller ADCs without level-shifting circuitry. LM324KAN is routinely deployed in 5V-only systems such as PC peripherals and smart home controllers.
What is the input offset voltage specification for LM324KAN?
LM324KAN has a maximum input offset voltage of ±7mV at 25°C, with typical value of ±3mV. Over the full 0°C to +70°C operating range, the max remains ±7mV. This spec defines the smallest differential input that can be reliably resolved without trimming - critical for DC-coupled amplification in LM324KAN-based sensor front-ends.
Is LM324KAN pin-compatible with LM2902?
Yes, LM324KAN is pin-compatible with LM2902 in PDIP-14 packaging, sharing identical pinout, supply connections, and amplifier topology. However, LM2902 is rated for –40°C to +125°C and features higher ESD immunity (2kV HBM), whereas LM324KAN is limited to 0°C to +70°C and 500V HBM. LM324KAN may be substituted in non-extended-temp applications, but not vice versa without validation.
What thermal considerations apply to LM324KAN in PDIP package?
LM324KAN in PDIP (N package) has a junction-to-ambient thermal resistance (RθJA) of 83.5°C/W. At 30V supply and full output load, power dissipation can reach ~120mW per amplifier; proper PCB copper area and airflow are essential to maintain junction temperature below 150°C. LM324KAN's thermal design must account for ambient derating above 50°C, especially in enclosed enclosures like power supply housings.
LM324KAN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LM324KAN FAQ
1.How can I place an order for LM324KAN through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324KAN 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 LM324KAN reliable?
The price and inventory of LM324KAN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324KAN is usually 5 days.
3.What payment methods are accepted for LM324KAN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324KAN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324KAN?
LM324KAN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324KAN 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 LM324KAN?
For technical support, including LM324KAN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324KAN requirements.
6.How does Aetrix verify that LM324KAN is sourced from the original manufacturer or authorized distributors?
All LM324KAN 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 LM324KAN meets industry standards.
7.What is the process for return or replacement of LM324KAN?
All LM324KAN units undergo pre-shipment inspection (PSI). If there is an issue with LM324KAN, 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 LM324KAN part is unused and in its original packaging.
Return procedure for LM324KAN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324KAN Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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