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Texas Instruments LM224KAD
- Part No.:
- LM224KAD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224KAD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,920
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Product details
Overview
LM224KAD from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications requiring rail-to-rail input capability, 3V–36V single/dual supply operation, ±3mV max input offset voltage (25°C), and unity-gain stability. 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 LM224KAD datasheet, LM224KAD pinout, LM224KAD application, or LM224KAD equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed alternative parts with documented parameter differences.
Technical Context
The LM224KAD implements four independent high-voltage op-amps with common-mode input range extending to V– (ground in single-supply mode) and differential input voltage tolerance up to ±32V. Its internal architecture supports stable operation with capacitive loads ≤100pF and achieves 1.2MHz gain-bandwidth product with 0.5V/μs slew rate.
It operates across –25°C to +85°C ambient temperature, draws 240μA per amplifier (typical quiescent current), and features open-loop voltage gain ≥50V/mV at 25°C - enabling precision DC-coupled amplification without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial power rails and battery-backed systems without level-shifting. |
| Input Offset Voltage (max) | ±3 mV at 25°C - ensures ≤3mV DC error in sensor signal chains before amplification. |
| Common-Mode Input Range | V– to (V+) – 2V - enables direct sensing of ground-referenced signals in single-supply configurations. |
| Output Swing (from rail) | 1.5V from positive rail / 100mV from negative rail - allows usable dynamic range near supply limits. |
| Quiescent Current (per amp) | 240 μA typical - enables low-power operation in always-on monitoring circuits. |
| Gain-Bandwidth Product | 1.2 MHz - supports stable closed-loop gain up to ~120 at 10kHz for audio and control loop bandwidths. |
| Slew Rate | 0.5 V/μs - sufficient for <10kHz sinusoidal output at 5Vpp without distortion. |
Pinout & Package
LM224KAD uses the D (SOIC-14) package: 8.65mm × 6mm body, 1.27mm pitch, surface-mount, plastic encapsulated. Pinout conforms to industry-standard quad op-amp layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input | Negative feedback node for amplifier A; accepts signals down to V–. |
| 1IN+ (Pin 3) | Non-inverting input | Reference or sensor input for amplifier A; common-mode range includes V–. |
| 1OUT (Pin 1) | Output | Amplifier A output; drives loads ≥10kΩ with rail-swing capability. |
| 2IN– (Pin 6) | Inverting input | Negative feedback node for amplifier B; electrically isolated from other sections. |
| 2IN+ (Pin 5) | Non-inverting input | Signal input for amplifier B; shares same VCM spec as Pin 2/3. |
| 2OUT (Pin 7) | Output | Amplifier B output; identical drive strength and swing to Pin 1. |
| 3IN– (Pin 9) | Inverting input | Feedback node for amplifier C; no crosstalk with Pins 2/6 per 120dB channel separation. |
| 3IN+ (Pin 10) | Non-inverting input | Input for amplifier C; supports differential input up to supply voltage. |
| 3OUT (Pin 8) | Output | Amplifier C output; specified for 1mA sink/source at rail limits. |
| 4IN– (Pin 13) | Inverting input | Feedback node for amplifier D; validated for EMI/RF rejection per integrated filter. |
| 4IN+ (Pin 12) | Non-inverting input | Input for amplifier D; matches input bias current spec of ≤50nA over full temp range. |
| 4OUT (Pin 14) | Output | Amplifier D output; short-circuit protected to ±60mA (absolute max). |
| VCC+ (Pin 4) | Positive supply | Main power rail; must be ≥3V above VCC– for valid operation. |
| VCC– (Pin 11) | Negative supply / ground | Return path; used as ground in single-supply configs; not internally tied to substrate. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Common-mode range includes V–, enabling direct interface with grounded sensors and transducers. |
| Integrated EMI/RF filter | Reduces susceptibility to 30MHz–1GHz noise in motor-drive and switching-power environments. |
| Low input bias current | ≤50nA maximum across –25°C to +85°C - minimizes voltage error in high-impedance source networks. |
| Unity-gain stable | No external compensation required for gains ≥1, simplifying PCB layout in voltage-follower and buffer designs. |
| High ESD rating | 2kV HBM - improves robustness during board assembly and field handling without added protection circuitry. |
Applications
| Power Supply Feedback Control | Multi-Function Printer Sensor Interface |
|---|---|
Use Scenario: Monitoring output voltage in 12V/24V AC-DC adapters using resistive divider into op-amp buffer. IC Role / Device Role / Timing Role: Precision DC buffer and error amplifier in voltage regulation loop. Use Value: ±3mV offset ensures ≤0.025% voltage setpoint error at 12V output; rail-swing output drives PWM controller reference pin directly. | Use Scenario: Amplifying thermistor and paper-path sensor outputs in printer mainboard. IC Role / Device Role / Timing Role: Signal conditioner for analog temperature and position detection. Use Value: Low 240μA/quiescent current extends standby battery life; V–-to-(V+−2V) input range accommodates 0–5V sensor spans without level shift. |
| AC Inverter Motor Control | Desktop PC Motherboard Monitoring |
Use Scenario: Isolating and scaling current-sense signals from IGBT gate drivers in 3-phase inverters. IC Role / Device Role / Timing Role: High-voltage differential amplifier front-end for fault detection. Use Value: ±32V differential input rating allows direct connection to shunt resistors; 1.2MHz GBW supports fast overcurrent response within 10μs window. | Use Scenario: Monitoring +3.3V, +5V, and +12V rails on ATX motherboards via resistor dividers. IC Role / Device Role / Timing Role: Rail voltage comparator and analog monitor channel. Use Value: Four independent amps enable simultaneous monitoring of three rails plus margining test signal; SOIC-14 footprint fits dense VRM layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2902KDR | Same SOIC-14 package; wider operating temp (–40°C to +125°C); ±7mV max offset (25°C). | Better suited for automotive under-hood or industrial outdoor enclosures requiring extended temperature range. | Select LM2902KDR when ambient exceeds +85°C or tighter thermal derating is needed; accept higher offset for broader temp coverage. |
| LM324KDR | Same SOIC-14 package; commercial temp range (0°C to +70°C); ±7mV max offset (25°C); lower cost. | Targeted for cost-driven consumer electronics where ambient stays below +70°C and offset tolerance >3mV is acceptable. | Choose LM324KDR for non-industrial applications with relaxed accuracy and temperature requirements to reduce BOM cost. |
Compared with LM224KAD, LM2902KDR offers extended temperature operation at the expense of higher input offset, while LM324KDR reduces cost and performance margins for consumer-grade use - making LM224KAD the optimal balance of industrial temp range, offset accuracy, and SOIC-14 compatibility.
Availability
LM224KAD is available at Aetrix Electronics and suitable for AC inverters, multi-function printers, and desktop PC motherboard monitoring requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM224KAD 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 industrial-grade signal chain solutions.
The LM224KAD belongs to TI's legacy LMx24 family of quad operational amplifiers, engineered for reliability in cost-sensitive industrial control, power management, and consumer electronics where robustness, wide supply range, and proven design-in history are critical.
FAQ
What is the maximum operating temperature range for the LM224KAD?
The LM224KAD is rated for operation from –25°C to +85°C ambient temperature. This industrial-grade range supports deployment in enclosed power supplies, HVAC controllers, and office equipment where internal board temperatures exceed commercial limits but do not reach automotive extremes. The LM224KAD datasheet specifies electrical characteristics across this full range, including input offset drift and output drive capability.
Does the LM224KAD support single-supply operation?
Yes, the LM224KAD fully supports single-supply operation. Its common-mode input voltage range extends to V– (pin 11), allowing direct connection of grounded sensors or reference voltages. With V– tied to system ground and VCC+ (pin 4) supplied at 5V–36V, all four amplifiers function correctly - a key requirement for battery-powered instrumentation and low-voltage industrial controls.
What is the input offset voltage specification for the LM224KAD?
The LM224KAD has a maximum input offset voltage of ±3 mV at 25°C, per the official Texas Instruments datasheet (SLOS066AE). At full temperature range (–25°C to +85°C), the offset remains within ±4 mV. This value is measured across all four amplifiers and defines the worst-case DC error introduced when inputs are shorted - critical for precision DC amplification in sensor signal chains.
Can the LM224KAD drive capacitive loads?
Yes, the LM224KAD is characterized to drive capacitive loads up to 100 pF while maintaining stability, as confirmed in the datasheet's "Capacitive load drive" parameter (CLOAD = 100 pF). For loads exceeding 100 pF, external series resistance (typically 10–100Ω) at the output is recommended to prevent peaking or oscillation - a standard practice validated in TI application notes for LMx24-family op-amps.
Is the LM224KAD pin-compatible with other LM224 variants?
Yes, the LM224KAD is pin-compatible with all SOIC-14 packaged LM224-series devices, including LM224K, LM224KA, LM324K, and LM2902K. The "K" suffix denotes SOIC-14 packaging, and the "AD" suffix confirms tape-and-reel packaging per TI's ordering nomenclature. No PCB layout changes are required when substituting within this package group, provided operating conditions (voltage, temperature, load) remain within each variant's specified limits.
LM224KAD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM224KAD FAQ
1.How can I place an order for LM224KAD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224KAD 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 LM224KAD reliable?
The price and inventory of LM224KAD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224KAD is usually 5 days.
3.What payment methods are accepted for LM224KAD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224KAD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224KAD?
LM224KAD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224KAD 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 LM224KAD?
For technical support, including LM224KAD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224KAD requirements.
6.How does Aetrix verify that LM224KAD is sourced from the original manufacturer or authorized distributors?
All LM224KAD 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 LM224KAD meets industry standards.
7.What is the process for return or replacement of LM224KAD?
All LM224KAD units undergo pre-shipment inspection (PSI). If there is an issue with LM224KAD, 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 LM224KAD part is unused and in its original packaging.
Return procedure for LM224KAD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224KAD 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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