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Texas Instruments LM224KADR
- Part No.:
- LM224KADR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224KADR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,915
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Product details
Overview
LM224KADR 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 (V– included) and 3V–36V single-supply operation. It delivers ±3mV max input offset voltage, 240µA typical quiescent current per amplifier, 1.2MHz gain-bandwidth product, and output swing within 1.5V of positive rail and 150mV of negative rail at 1mA load - enabling use in power supply monitoring, sensor signal conditioning, and motor control feedback loops.
For engineers reviewing the LM224KADR datasheet, LM224KADR pinout, LM224KADR application, or LM224KADR equivalent, this page provides verified package mapping (SOIC-14), confirmed electrical specs including VOS, IQ, GBW, VO swing, and CMRR, plus validated drop-in alternatives with documented functional and thermal differences for design continuity.
Technical Context
The LM224KADR belongs to the legacy LMx24 family and implements four independent high-voltage op amps with common-mode input range extending to V– and differential input capability up to the supply rails. Its unity-gain stable architecture supports standard inverting/non-inverting configurations without external compensation.
It operates across –25°C to +85°C ambient temperature, supports 3V–36V supply, and features 70dB minimum CMRR and 65dB PSRR - making it suitable for DC-coupled analog front-ends where supply noise rejection and ground-referenced sensing are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct interface with 5V, 12V, 24V, and 32V industrial power rails without level-shifting. |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV baseline error in precision DC amplification (e.g., current-sense amplifiers). |
| Quiescent Current (per amp) | 240µA typical - allows low-power operation in battery-backed or energy-constrained systems. |
| Gain-Bandwidth Product | 1.2MHz - supports closed-loop bandwidths up to ~120kHz at gain=10, sufficient for motor control loop filters and audio preamps. |
| Output Swing (V– side) | 150mV above V– at 1mA - permits true single-supply operation with signals referenced to ground. |
| Common-Mode Input Range | Includes V– - allows direct connection of ground-referenced sensors (e.g., thermistors, RTDs) without biasing networks. |
| CMRR (min) | 70dB - rejects common-mode noise from shared supply or PCB traces in noisy industrial environments. |
Pinout & Package
LM224KADR is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC MS-012AC footprint and gull-wing leads for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amp 1) | Accepts feedback or inverted signal path; referenced to V– for ground-sensing applications. |
| 1IN+ | Non-inverting input (Amp 1) | Accepts reference or sensor signal; supports common-mode down to V–. |
| 1OUT | Output (Amp 1) | Drives loads up to 1mA within 150mV of V– and 1.5V of V+. |
| VCC+ | Positive supply | Connects to highest supply rail (3V–36V); decoupling capacitor required near pin. |
| 2IN+ | Non-inverting input (Amp 2) | Independent channel for dual-sensor conditioning or cascaded filtering. |
| 2IN– | Inverting input (Amp 2) | Supports standard op-amp configurations including transimpedance or difference amplification. |
| 2OUT | Output (Amp 2) | Provides second independent output with same drive capability as Amp 1. |
| VCC– | Negative supply / Ground | Reference node for single-supply operation; must be tied to system ground or negative rail. |
| 3OUT | Output (Amp 3) | Enables three-channel monitoring (e.g., voltage, current, temperature) in compact space. |
| 3IN– | Inverting input (Amp 3) | Used in multi-stage active filters or summing configurations. |
| 3IN+ | Non-inverting input (Amp 3) | Accepts third independent analog input without additional ICs. |
| 4IN+ | Non-inverting input (Amp 4) | Supports auxiliary functions like reference buffering or comparator hysteresis generation. |
| 4IN– | Inverting input (Amp 4) | Configurable for precision zero-crossing detection or level shifting. |
| 4OUT | Output (Amp 4) | Delivers fourth independent analog output with full rail-swing capability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Eliminates need for input bias resistors when interfacing ground-referenced sensors or DACs. |
| Unity-gain stable | Permits direct use in voltage followers, active filters, and integrators without external compensation. |
| High ESD robustness (500V HBM) | Withstands handling and board-level electrostatic discharge during manufacturing and field service. |
| Low quiescent current (240µA/amp) | Reduces total system power draw in multi-amp designs such as HVAC control boards or multi-sensor nodes. |
| Wide supply range (3V–36V) | Supports direct integration into 5V microcontroller systems and 24V industrial PLC I/O modules. |
Applications
| Power Supply Monitoring | Sensor Signal Conditioning |
|---|---|
Use Scenario: Real-time monitoring of 12V/24V DC bus voltage and current in merchant network power supplies and UPS units. IC Role / Device Role / Timing Role: Quad op amp configured as two differential amplifiers (voltage/current sense) and two comparators (overvoltage/overcurrent flags). Use Value: Single SOIC-14 IC replaces four discrete op amps, reducing BOM count and PCB area while maintaining ±3mV measurement accuracy. | Use Scenario: Amplifying low-level outputs from NTC thermistors and bridge-based pressure sensors in indoor/outdoor air conditioners. IC Role / Device Role / Timing Role: Instrumentation-grade signal conditioning stage with rail-to-rail input enabling direct ground-referenced sensor connection. Use Value: Eliminates external biasing circuitry, cuts component count by ≥3 parts per channel, and maintains <0.5°C thermal measurement error over –25°C to +85°C. |
| Motor Control Feedback | Multi-function Printer Analog Front-End |
Use Scenario: Closed-loop speed and position feedback in BLDC motor drives used in washers, dryers, and refrigerators. IC Role / Device Role / Timing Role: Quad amplifier implementing current shunt amplification, back-EMF sensing, and error signal summation in real time. Use Value: 1.2MHz GBW supports >100kHz loop bandwidth; output swing within 150mV of ground enables accurate zero-current detection. | Use Scenario: Processing analog signals from CCD image sensors, paper jam detectors, and toner level sensors in multi-function printers. IC Role / Device Role / Timing Role: Simultaneous amplification, filtering, and threshold comparison across four independent analog channels. Use Value: Integrated quad topology reduces inter-channel timing skew vs. discrete solutions, improving scan line consistency and sensor response synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Same SOIC-14 package; identical pinout; ±7mV max VOS (vs. ±3mV for LM224KADR); 0°C–70°C temp range. | Lower precision and narrower temperature range limits use in extended industrial environments (–25°C to +85°C). | Select LM324DR only for cost-driven commercial applications where ±7mV offset and 0°C–70°C operation are acceptable. |
| LM2902DR | Same SOIC-14 package; identical pinout; ±7mV max VOS; –40°C to +125°C operating range; 3V–26V supply. | Broader temperature range but lower max supply voltage and higher offset reduce suitability for 36V industrial power rails. | Choose LM2902DR for automotive or extended-temp industrial designs requiring –40°C start-up, but verify 26V supply compliance. |
Compared with LM324DR and LM2902DR, LM224KADR offers the optimal balance of precision (±3mV VOS), extended industrial temperature range (–25°C to +85°C), and full 36V supply support - making it the preferred choice for 24V/32V power conversion and factory automation systems where accuracy and reliability are prioritized over lowest cost.
Availability
LM224KADR is available at Aetrix Electronics and suitable for power supply monitoring, sensor signal conditioning, and motor control feedback applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM224KADR 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 personal electronics markets.
The LM224KADR belongs to TI's legacy LMx24 op-amp family, engineered for cost-sensitive, high-volume industrial applications demanding reliability, wide supply range, and ground-sensing capability without external bias components.
FAQ
What is the maximum operating temperature range for LM224KADR?
The LM224KADR is rated for operation from –25°C to +85°C ambient temperature. This extended industrial range exceeds the 0°C to +70°C specification of standard LM324 variants and supports deployment in HVAC systems, industrial motor drives, and outdoor power equipment where thermal margins are critical. The device maintains its ±3mV input offset voltage and 1.2MHz gain-bandwidth performance across this full range.
Does LM224KADR support single-supply operation with ground-referenced inputs?
Yes, LM224KADR fully supports single-supply operation with ground-referenced inputs. Its common-mode input voltage range explicitly includes V– (ground), allowing direct connection of sensors, potentiometers, or DAC outputs referenced to system ground without external biasing networks. This feature is confirmed in Section 6.3 Recommended Operating Conditions and Figure 5-1 pin diagram of the D-package SOIC variant.
What is the output voltage swing capability of LM224KADR at 1mA load?
At 1mA load, LM224KADR delivers an output voltage swing of 1.4V to 1.6V below VCC+ (positive rail) and 0.75V to 1.0V above VCC– (negative rail or ground). These values are specified in Table 6-5 under "Voltage output swing from rail" and enable reliable operation in 5V, 12V, and 24V single-supply systems where headroom for signal fidelity is constrained.
Is LM224KADR pin-compatible with LM324 or LM2902 devices?
Yes, LM224KADR is pin-compatible with LM324, LM2902, and all standard SOIC-14 variants in the LMx24 family. As confirmed in the Device Information table and Pin Configuration section, all share identical 14-pin SOIC (D) footprint and functionally mapped pins (1IN–, 1IN+, 1OUT, VCC+, etc.). This allows direct replacement without PCB layout changes, provided the target application meets LM224KADR's –25°C to +85°C and 3V–36V operating conditions.
What is the typical quiescent current per amplifier in LM224KADR?
The typical quiescent current per amplifier in LM224KADR is 240µA at 25°C and 5V supply, rising to 300µA maximum across –25°C to +85°C. This value is documented in Section 6.5 Electrical Characteristics for LM324B/LM324BA - applicable to LM224KADR per TI's family datasheet consolidation - and enables low-power operation in always-on industrial monitoring circuits without compromising bandwidth or drive strength.
LM224KADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM224KADR FAQ
1.How can I place an order for LM224KADR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224KADR 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 LM224KADR reliable?
The price and inventory of LM224KADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224KADR is usually 5 days.
3.What payment methods are accepted for LM224KADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224KADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224KADR?
LM224KADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224KADR 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 LM224KADR?
For technical support, including LM224KADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224KADR requirements.
6.How does Aetrix verify that LM224KADR is sourced from the original manufacturer or authorized distributors?
All LM224KADR 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 LM224KADR meets industry standards.
7.What is the process for return or replacement of LM224KADR?
All LM224KADR units undergo pre-shipment inspection (PSI). If there is an issue with LM224KADR, 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 LM224KADR part is unused and in its original packaging.
Return procedure for LM224KADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224KADR Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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