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Texas Instruments LM224KAN
- Part No.:
- LM224KAN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM224KAN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,381
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Product details
Overview
LM224KAN 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 capability, 3V–30V supply operation, ±7mV max input offset voltage at 25°C, and common-mode input range extending to V–. It serves as a general-purpose signal conditioning and amplification IC in power supply feedback loops, sensor interfaces, and analog front-ends.
For engineers reviewing the LM224KAN datasheet, LM224KAN pinout, LM224KAN application, or LM224KAN equivalent, this page delivers verified electrical specifications, validated pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed drop-in alternatives with documented parameter trade-offs.
Technical Context
The LM224KAN implements four independent high-voltage op-amps in a single monolithic silicon die, featuring unity-gain stability, input stage biasing that supports common-mode voltage down to the negative rail (V–), and output swing within 1.5V of V+ and 20mV of V– under 1mA load. Its architecture enables single-supply operation without level-shifting circuitry.
It operates across –25°C to +85°C ambient temperature, supports differential input voltages up to ±32V, and maintains open-loop gain ≥25 V/mV over full temperature range. Input bias current remains ≤–500nA (max) and quiescent current per amplifier is 0.7–1.2mA (four-amplifier total) at 5V supply.
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 | 3V to 30V - supports wide-input industrial power rails and battery-backed systems without external regulators. |
| Input Offset Voltage (max) | ±7 mV at 25°C - sets baseline DC error in precision gain stages; requires calibration or trimming for sub-mV accuracy. |
| Common-Mode Input Range | V– to (V+) – 1.5V - enables direct sensing of signals referenced to ground in single-supply configurations. |
| Output Swing (min) | Within 20 mV of V– and 1.5 V of V+ at 1 mA - allows near-ground-level detection and high-side saturation in comparator or buffer roles. |
| Quiescent Current (total) | 0.7–1.2 mA - ensures low power consumption in always-on monitoring circuits while maintaining bandwidth. |
| Gain-Bandwidth Product | 1.2 MHz - supports closed-loop gains up to ~120 at 10 kHz, suitable for anti-aliasing, active filtering, and slow-control loops. |
Pinout & Package
LM224KAN uses a 14-pin Plastic Dual In-line Package (PDIP) measuring 19.3 mm × 9.4 mm, optimized for through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Unused internal die connections - must remain unconnected to avoid parasitic coupling or latch-up. |
| 2 | Inverting Input (Amp 1) | Accepts feedback or signal inversion node; high-impedance input enables high-Z sensor interfacing. |
| 3 | Non-Inverting Input (Amp 1) | Reference or signal source input; common-mode range includes V– for ground-referenced sources. |
| 4 | Positive Supply (VCC+) | Main power rail connection; accepts up to 30V DC - no external reverse-polarity protection required. |
| 6 | Non-Inverting Input (Amp 2) | Independent channel input - allows dual-sensor conditioning or differential pair implementation. |
| 9 | Inverting Input (Amp 2) | Paired with Pin 6 for second amplifier; identical electrical specs to Pin 2. |
| 10 | Output (Amp 2) | Low-impedance buffered output - drives 2kΩ loads directly; short-circuit protected to ±60 mA. |
| 12 | Output (Amp 3) | Third independent output - enables three-stage signal chain (e.g., filter → gain → clamp) on one IC. |
| 13 | Inverting Input (Amp 3) | Matches Pin 2/9 functionality; supports cascaded or parallel amplifier topologies. |
| 14 | Output (Amp 4) | Final channel output - used for reference buffering, LED drive, or fault indicator signaling. |
| 8 | Output (Amp 1) | Primary output; typical use includes transducer amplification or voltage follower for ADC input driving. |
| 11 | Negative Supply / Ground | Return path for single- or dual-supply operation; connects to system GND or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at V–, eliminating need for level-shifters in ground-referenced sensor circuits. |
| High ESD tolerance | 500 V HBM rating - withstands handling in non-ESD-controlled environments during assembly. |
| Unity-gain stable | Configurable as buffer, integrator, or active filter without external compensation components. |
| Low quiescent current | 0.7–1.2 mA total for four amplifiers - extends battery life in portable instrumentation and IoT edge nodes. |
| Robust output short-circuit protection | Unlimited duration at TA ≤ 25°C and VCC ≤ 15V - prevents failure during transient overloads in motor control feedback. |
Applications
| Power Supply Feedback | Multi-function Printer Sensors |
|---|---|
Use Scenario: Monitoring output voltage in 12V/24V offline SMPS for closed-loop regulation. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output to reference; sets loop response via compensation network on Pins 1/2/3. Use Value: Input common-mode range including V– allows direct connection to low-side shunt, reducing component count vs. isolated sensing. | Use Scenario: Converting paper jam, toner level, and fuser temperature signals into clean analog voltages. IC Role / Device Role / Timing Role: Signal conditioner for thermistors and photo-interrupters; each amp handles one sensor channel. Use Value: Four independent amps enable simultaneous acquisition without multiplexing delay or crosstalk degradation. |
| AC Inverter Control | Home Appliance Motor Drive |
Use Scenario: Isolating and scaling current-sense signals from IGBT gate drivers in 3-phase inverters. IC Role / Device Role / Timing Role: Differential input stage (Pins 2/3) rejecting common-mode noise on motor phase currents. Use Value: 120 dB channel separation minimizes interference between adjacent amplifier channels in compact inverter PCB layouts. | Use Scenario: Amplifying hall-effect rotor position signals in washing machine drum motors. IC Role / Device Role / Timing Role: Low-noise preamplifier feeding MCU ADC; operates from same 5V rail as microcontroller. Use Value: 35 nV/√Hz input voltage noise density preserves signal integrity for precise commutation timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324N | Same PDIP-14 package; wider temp range (0°C to +70°C vs. –25°C to +85°C); ±7mV VOS max at 25°C - identical offset spec but narrower operating window. | Preferred for commercial-grade desktop PC motherboards where extended temperature is unnecessary. | Select LM324N when cost is primary driver and ambient does not exceed 70°C. |
| LM2902N | Same pinout; rated for –40°C to +125°C; ±7mV VOS max at 25°C; higher ESD (500V HBM) - broader thermal envelope and equal DC precision. | Suitable for automotive cabin modules and outdoor HVAC controllers requiring extended temperature compliance. | Choose LM2902N for designs needing industrial or automotive temperature qualification without layout change. |
Compared with LM224KAN, LM324N offers lower unit cost but sacrifices low-end temperature capability, while LM2902N provides guaranteed operation down to –40°C with identical DC performance - making it the preferred upgrade path for harsh-environment deployments.
Availability
LM224KAN is available at Aetrix Electronics and suitable for merchant network power supplies, multi-function printers, and indoor air conditioners requiring stable component supply across long production lifecycles.
Supply support for LM224KAN 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 industrial market reach.
The LMx24 family was engineered for cost-sensitive, high-volume applications demanding reliability, wide supply range, and ease of use - targeting power management, appliance control, and legacy industrial systems.
FAQ
What is the maximum supply voltage for LM224KAN?
The absolute maximum supply voltage for LM224KAN is 32V, but the recommended operating range is 3V to 30V. Exceeding 30V risks exceeding safe junction temperature limits under load, especially in PDIP packages with higher thermal resistance (RθJA = 83.5°C/W). For continuous operation, TI specifies 30V as the upper limit in Recommended Operating Conditions.
Does LM224KAN support rail-to-rail output?
LM224KAN does not provide rail-to-rail output swing. Its output can swing within 1.5V of V+ and as low as 20mV above V– at 1mA load. At lighter loads (e.g., 50µA), the negative swing improves to 100–150mV above V–. This behavior is consistent across all LM224 variants and reflects the bipolar output stage design.
Can LM224KAN replace LM324N in existing designs?
Yes, LM224KAN is a direct pin-compatible and functionally equivalent replacement for LM324N in PDIP-14 sockets. Both share identical pinout, electrical specs (±7mV VOS max, 1.2MHz GBW), and package dimensions. LM224KAN extends the minimum operating temperature to –25°C, offering improved robustness in cooler environments without any PCB or schematic changes.
What is the input bias current specification for LM224KAN?
LM224KAN has a maximum input bias current of –500nA at full temperature range (–25°C to +85°C), with typical value of –20nA at 25°C. This bipolar-input characteristic necessitates matched PCB trace impedances on inverting and non-inverting inputs to minimize offset voltage contribution from bias current mismatch.
Is LM224KAN qualified for automotive applications?
No, LM224KAN is not AEC-Q200 qualified. Its specified operating temperature range is –25°C to +85°C, falling short of the –40°C to +125°C requirement for automotive grade. For automotive use, TI recommends LM2902N or LM2902B variants, which are explicitly qualified and tested to AEC standards.
LM224KAN 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:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LM224KAN FAQ
1.How can I place an order for LM224KAN through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224KAN 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 LM224KAN reliable?
The price and inventory of LM224KAN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224KAN is usually 5 days.
3.What payment methods are accepted for LM224KAN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224KAN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224KAN?
LM224KAN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224KAN 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 LM224KAN?
For technical support, including LM224KAN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224KAN requirements.
6.How does Aetrix verify that LM224KAN is sourced from the original manufacturer or authorized distributors?
All LM224KAN 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 LM224KAN meets industry standards.
7.What is the process for return or replacement of LM224KAN?
All LM224KAN units undergo pre-shipment inspection (PSI). If there is an issue with LM224KAN, 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 LM224KAN part is unused and in its original packaging.
Return procedure for LM224KAN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224KAN 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
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LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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