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Texas Instruments LM224AN
- Part No.:
- LM224AN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM224AN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:9,536
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Product details
Overview
LM224AN 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 to 30V supply operation, ±7mV max input offset voltage at 25°C, and unity-gain stability - used in power supply feedback loops, sensor signal conditioning, and desktop PC motherboard voltage monitoring.
For engineers reviewing the LM224AN datasheet, LM224AN pinout, LM224AN application, or LM224AN equivalent, this page delivers verified electrical specs, validated PDIP-14 pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed drop-in alternatives with documented thermal and ESD differences.
Technical Context
The LM224AN implements four independent high-voltage op amps with common-mode input range extending to V– (ground in single-supply mode), differential input voltage tolerance up to ±32V, and output swing within 1.5V of rails under 2kΩ load. It operates across –25°C to +85°C ambient temperature with 0.7–1.2mA total quiescent current (four amplifiers).
Its internal architecture supports single- or dual-supply configurations, features no phase-reversal on overdrive, and maintains stable operation with capacitive loads up to 100pF - enabling direct interface with ADC drivers and comparator front-ends without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports wide-input industrial power rails and battery-backed systems without level-shifting. |
| Input Offset Voltage (max) | ±7mV at 25°C - sets baseline DC error budget for precision gain stages in sensor interfaces. |
| Common-Mode Input Range | V– to (V+) – 1.5V - enables ground-sensing in single-supply configurations like 5V microcontroller analog front-ends. |
| Output Swing (min) | Within 1.5V of rails (RL = 2kΩ) - allows usable dynamic range in 5V/12V systems despite non-rail-to-rail output. |
| Quiescent Current (total) | 0.7–1.2mA - ensures low standby power in always-on embedded monitors and HVAC control modules. |
| Gain-Bandwidth Product | 1.2MHz - sufficient for closed-loop gains ≤100 in DC-coupled signal conditioning and slow-control loops. |
| ESD Rating (HBM) | ±500V - meets basic handling requirements for assembly in non-classified manufacturing environments. |
Pinout & Package
N (PDIP, 14) package: 19.3mm × 9.4mm body, through-hole mounting, 0.3-inch width, standard DIP footprint compatible with legacy PCB layouts and manual prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amplifier 1) | Accepts negative feedback or inverted signal path; referenced to V– for single-supply biasing. |
| 1IN+ | Non-inverting input (Amplifier 1) | Direct connection point for reference voltage or sensor output in non-inverting configurations. |
| 1OUT | Output (Amplifier 1) | Drives loads up to 20mA sink/source; requires external pull-up if interfacing with open-drain logic. |
| VCC+ | Positive supply | Connects to main system rail (e.g., +12V or +5V); decoupling capacitor required within 10mm. |
| 2IN+ | Non-inverting input (Amplifier 2) | Independent channel for parallel signal paths - e.g., dual thermistor inputs in climate control. |
| 2IN– | Inverting input (Amplifier 2) | Supports differential measurement when paired with 2IN+ and matched resistors. |
| 2OUT | Output (Amplifier 2) | Electrically isolated from other outputs; no crosstalk above 120dB at 1kHz. |
| VCC– | Negative supply / ground | Return path for all four amplifiers; must be low-impedance in single-supply setups. |
| 3IN– | Inverting input (Amplifier 3) | Used in active filter sections where phase inversion is required before summing nodes. |
| 3IN+ | Non-inverting input (Amplifier 3) | Enables unity-gain buffer configuration for impedance isolation in analog multiplexing. |
| 3OUT | Output (Amplifier 3) | Capable of driving 100pF capacitive loads directly - suitable for ADC input buffering. |
| 4IN– | Inverting input (Amplifier 4) | Configurable as comparator input when overdriven; no phase reversal observed beyond common-mode limits. |
| 4IN+ | Non-inverting input (Amplifier 4) | Accepts reference voltage for window comparator implementations with external hysteresis resistors. |
| 4OUT | Output (Amplifier 4) | Provides fault-indicator output in PSU monitoring circuits; sinks current when overvoltage detected. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates without external compensation in follower, integrator, or gain-of-10 configurations - reduces BOM count. |
| Input voltage range includes V– | Enables true single-supply operation down to ground, eliminating need for negative rail in 3.3V/5V systems. |
| Differential input voltage up to ±32V | Permits direct connection to unconditioned transducer outputs or motor-phase signals without clamping diodes. |
| No phase reversal on overdrive | Maintains predictable output polarity during input overload - critical for safety-critical comparator fallback modes. |
| Low quiescent current per amplifier | 240µA typical (vs. older LM324 variants) - extends battery life in portable diagnostic tools and IoT edge sensors. |
Applications
| Power Supply Feedback Loop | Multi-Function Printer Sensor Interface |
|---|---|
Use Scenario: Regulating +12V and +5V rails in merchant network server PSUs using voltage divider + error amplifier topology. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against precision reference; drives PWM controller via optocoupler. Use Value: ±7mV offset ensures <±1% regulation accuracy across line/load variations without trimming. | Use Scenario: Conditioning thermistor, paper jam, and toner level signals in laser printer mainboard. IC Role / Device Role / Timing Role: Four-channel signal conditioner: one amp buffers reference, three condition sensor outputs. Use Value: Independent channels eliminate cross-talk between thermal and mechanical sensing paths. |
| Desktop PC Motherboard Voltage Monitoring | Indoor Air Conditioner Control Board |
Use Scenario: Real-time monitoring of CPU core, memory, and PCIe slot voltages for hardware health reporting. IC Role / Device Role / Timing Role: Quad comparator configured as window detector for each rail; outputs feed microcontroller GPIOs. Use Value: Common-mode range to V– allows direct connection to 0.8V–1.8V CPU domains without level shifters. | Use Scenario: Closed-loop control of compressor speed, fan RPM, and indoor coil temperature in split-system AC units. IC Role / Device Role / Timing Role: Signal conditioner for NTC thermistors and Hall-effect current sensors feeding MCU ADC. Use Value: 30V max supply accommodates 24V control bus transients during relay switching events. |
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; identical pinout; ±7mV offset, but rated only for 0°C to +70°C ambient. | Limited to commercial-grade desktop peripherals and non-temperature-critical chargers. | Select LM324N only when operating environment stays within 0–70°C and cost is primary constraint. |
| LM2902N | Same footprint; ±7mV offset; extended –40°C to +125°C rating; higher ESD (±500V HBM) and improved CMRR at extremes. | Suitable for automotive cabin modules and outdoor HVAC electronics exposed to thermal cycling. | Choose LM2902N when full industrial temperature range and robustness against ESD events are required. |
Compared with LM224AN, LM324N offers lower cost but narrower temperature range, while LM2902N provides wider operating range and better noise immunity - making it preferable for harsh-environment designs where long-term reliability outweighs marginal BOM savings.
Availability
LM224AN is available at Aetrix Electronics and suitable for power supplies, multi-function printers, and desktop PC motherboards requiring stable component supply with consistent parametric performance across production batches.
Supply support for LM224AN 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LMx24 family was engineered for cost-sensitive, general-purpose analog signal conditioning - targeting applications where robustness, wide supply range, and proven reliability matter more than ultra-low noise or GHz bandwidth.
FAQ
What is the maximum supply voltage for LM224AN?
The absolute maximum supply voltage for LM224AN is 32V, but the recommended operating range is 3V to 30V. Exceeding 30V risks exceeding safe junction temperature under load, especially in PDIP packages with higher thermal resistance (RθJA = 83.5°C/W). Always verify power dissipation using (TJ(max) – TA)/RθJA in your layout.
Does LM224AN support single-supply operation?
Yes, LM224AN supports true single-supply operation because its common-mode input voltage range includes V– (ground), and output can swing within 1.5V of V–. This allows use with 5V or 12V rails without negative supply - ideal for sensor buffers and comparator circuits in embedded systems where LM224AN replaces dual-supply op-amps.
What is the input offset voltage specification for LM224AN?
LM224AN has a maximum input offset voltage of ±7mV at 25°C, with full-range (–25°C to +85°C) drift up to ±9mV. This value is confirmed in Section 6.7 of the TI SLOS066AE datasheet for LM224/LM224K devices. It defines worst-case DC error in precision gain stages where LM224AN serves as the front-end amplifier.
Can LM224AN drive capacitive loads?
LM224AN can reliably drive capacitive loads up to 100pF without oscillation, as verified in TI's characterization data. For larger loads (e.g., ADC input capacitance >100pF), add a series resistor (100–300Ω) between LM224AN output and the load to maintain phase margin - a practice confirmed in LM224AN application notes for sensor signal chain design.
Is LM224AN pin-compatible with LM324N?
Yes, LM224AN is fully pin-compatible with LM324N in PDIP-14 packages: identical pin numbering, function mapping, and footprint. Both share the same 1IN–, 1IN+, 1OUT, VCC+, etc., layout per Figure 5-1. This allows drop-in replacement in existing designs, though LM224AN's –25°C to +85°C rating differs from LM324N's 0°C to +70°C range.
LM224AN 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:
- 1.3 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
LM224AN FAQ
1.How can I place an order for LM224AN through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224AN 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 LM224AN reliable?
The price and inventory of LM224AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224AN is usually 5 days.
3.What payment methods are accepted for LM224AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224AN?
LM224AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224AN 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 LM224AN?
For technical support, including LM224AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224AN requirements.
6.How does Aetrix verify that LM224AN is sourced from the original manufacturer or authorized distributors?
All LM224AN 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 LM224AN meets industry standards.
7.What is the process for return or replacement of LM224AN?
All LM224AN units undergo pre-shipment inspection (PSI). If there is an issue with LM224AN, 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 LM224AN part is unused and in its original packaging.
Return procedure for LM224AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224AN 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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