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Texas Instruments LM224ADR
- Part No.:
- LM224ADR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224ADR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,552
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Product details
Overview
LM224ADR from Texas Instruments is a quad operational amplifier IC designed for cost-sensitive, single-supply industrial and consumer applications. It delivers rail-to-rail input common-mode range (including V–), 36V max supply voltage, ±3mV max input offset voltage at 25°C, 1.2MHz gain-bandwidth product, and 240µA typical quiescent current per amplifier - enabling precision signal conditioning in power supplies, HVAC controls, and appliance motor interfaces.
For engineers reviewing the LM224ADR datasheet, LM224ADR pinout, LM224ADR application, or LM224ADR equivalent, this page provides verified package mapping (SOIC-14), confirmed electrical specs across –25°C to +85°C, real-world output swing data (1.35V from positive rail, 100mV from negative rail at light load), and two validated drop-in alternatives with documented thermal and ESD performance differences.
Technical Context
The LM224ADR belongs to the legacy LMx24 family and operates as a general-purpose voltage amplifier with unity-gain stability, internal frequency compensation, and four independent op-amp channels in one die. Its input stage supports common-mode voltages down to the negative rail, and its output can source/sink up to ±30mA while driving capacitive loads up to 100pF.
It features low input bias current (≤50nA across –25°C to +85°C), integrated EMI/RF filtering, and 500V HBM ESD rating - making it suitable for noisy environments like AC inverters and multi-function printers where robustness against electromagnetic interference is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports wide-input industrial power rails without external regulation |
| Input Offset Voltage (max) | ±3mV at 25°C - enables accurate DC-coupled sensing in temperature or current feedback loops |
| Gain-Bandwidth Product | 1.2MHz - sufficient for closed-loop gains up to ~120 at 10kHz signal bandwidth |
| Quiescent Current (per amp) | 240µA typical - allows four-channel amplification in battery-backed or energy-conscious systems |
| Output Swing (from rail) | 1.35V high-side / 100mV low-side at 50µA - ensures usable dynamic range near supply limits |
| Common-Mode Input Range | Includes V– (ground) - simplifies single-supply sensor interface design without level-shifting |
| ESD Rating (HBM) | 500V - meets basic handling requirements for manual assembly and board-level integration |
Pinout & Package
LM224ADR is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC outline and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Negative input of Amp 1 | Inverting node for first amplifier; accepts signals down to V– |
| 1IN+ | Positive input of Amp 1 | Non-inverting node; common-mode range includes V– |
| 1OUT | Output of Amp 1 | Capable of sourcing/sinking ±30mA; swings within 1.35V/0.1V of rails |
| VCC+ | Positive supply | Accepts 3V–30V; decoupling recommended at pin for noise immunity |
| 2IN+ | Positive input of Amp 2 | Independent channel; no crosstalk above 120dB at 1–20kHz |
| 2IN– | Negative input of Amp 2 | Matches Amp 1 characteristics; identical offset and bias specs |
| 2OUT | Output of Amp 2 | Electrically isolated from other outputs; stable into 100pF capacitive load |
| VCC– | Negative supply / ground | Reference for single-supply operation; tied to system GND in most designs |
| 3IN– | Negative input of Amp 3 | Same input structure as Amps 1 & 2; supports rail-to-rail common-mode |
| 3IN+ | Positive input of Amp 3 | Enables differential or single-ended configurations without external biasing |
| 3OUT | Output of Amp 3 | Delivers same drive strength and settling time (4µs to 0.1%) as other channels |
| 4IN– | Negative input of Amp 4 | Final channel; shares all electrical specs and thermal behavior with others |
| 4IN+ | Positive input of Amp 4 | Allows full utilization of quad topology for multi-sensor or multi-stage filtering |
| 4OUT | Output of Amp 4 | Validated for continuous short-circuit to ground at TA ≤ 25°C and VCC ≤ 15V |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at V– (ground), eliminating need for input bias resistors in single-supply configurations |
| Integrated EMI/RF filter | Reduces susceptibility to 30–1000MHz noise in motor drive and power supply feedback paths |
| Low input bias current (≤50nA) | Minimizes voltage error in high-impedance sensor interfaces such as thermistor or photodiode circuits |
| Unity-gain stable architecture | Supports direct use in voltage followers, active filters, and transimpedance amplifiers without external compensation |
| Drop-in replacement for LM224/LM324 | Pin-compatible with legacy variants, enabling seamless upgrade in existing PCB layouts without redesign |
Applications
| Power Supply Feedback Control | Appliance Motor Interface |
|---|---|
Use Scenario: Regulating output voltage in offline AC-DC adapters and DC-DC converters using optocoupler-coupled feedback loops. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference; drives optocoupler LED via configured gain network. Use Value: ±3mV offset ensures <±1% regulation accuracy over temperature; rail-to-rail input accommodates low-side current sense signals. | Use Scenario: Amplifying hall-effect or back-EMF signals in BLDC motor controllers for washing machines and refrigerators. IC Role / Device Role / Timing Role: Signal conditioner front-end for rotor position detection before ADC sampling. Use Value: 1.2MHz GBW supports clean 20kHz PWM rejection; 500V HBM withstands motor commutation transients. |
| HVAC Temperature Sensing | Multi-Function Printer Signal Chain |
Use Scenario: Converting NTC thermistor voltage drops into linearized analog signals for microcontroller ADC input in indoor/outdoor air conditioners. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with programmable gain to scale thermistor output to 0–3.3V range. Use Value: Low 240µA quiescent current per amp extends battery life in wireless thermostat nodes; matched channel specs enable dual-sensor redundancy. | Use Scenario: Conditioning image sensor outputs and paper jam detector signals in laser and inkjet printer mainboards. IC Role / Device Role / Timing Role: Four-channel buffer and level shifter for analog sensor and actuator interfaces. Use Value: 120dB channel separation prevents crosstalk between scan head and paper path sensors; SOIC-14 footprint fits compact printer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM224DR | Same SOIC-14 package; identical electrical specs but rated for –25°C to +85°C only (no A-suffix grade) | No extended temperature validation; unsuitable for automotive under-hood or industrial outdoor enclosures | Select when operating ambient stays within –25°C to +85°C and cost optimization is critical |
| LM324ADR | Same pinout and function; differs in supply voltage max (30V vs. 26V) and offset voltage (±3mV vs. ±7mV) | Lower precision and narrower supply range limit use in high-voltage industrial monitoring | Choose only if legacy LM324 compatibility is mandatory and 30V operation is not required |
Compared with LM224DR and LM324ADR, the LM224ADR offers superior offset voltage (±3mV vs. ±7mV) and wider supply range (30V vs. 26V), making it preferred for precision single-supply systems requiring long-term stability and margin against line surges.
Availability
LM224ADR is available at Aetrix Electronics and suitable for merchant network power supplies, indoor/outdoor HVAC controls, and multi-function printer signal chains requiring stable component supply across production lifecycles.
Supply support for LM224ADR 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 consumer markets.
The LM224ADR belongs to TI's legacy general-purpose op-amp product line, engineered for reliability and ease of use in cost-driven, single-supply applications including power management, appliance control, and sensor interfacing.
FAQ
What is the maximum operating temperature range for the LM224ADR?
The LM224ADR is specified for operation from –25°C to +85°C. This range is validated per TI's SLOS066AE datasheet Section 6.3, and applies to all electrical parameters unless otherwise noted. It is not rated for automotive-grade (–40°C to +125°C) or military-grade extremes, and thermal derating must be applied beyond +85°C ambient.
Does the LM224ADR support rail-to-rail output swing?
No, the LM224ADR does not provide rail-to-rail output swing. Per datasheet Section 6.5, its output swings to within 1.35V of the positive rail and 100mV of the negative rail at 50µA load. At higher currents (e.g., 1mA), swing degrades to 1.4V/0.75V respectively. For true rail-to-rail output, consider TI's TLV2464 or similar modern alternatives.
Can the LM224ADR replace LM324A in an existing design?
Yes, the LM224ADR is pin-compatible and functionally equivalent to LM324A in SOIC-14 packaging. Both share identical pinout, supply range (3V–30V), and key specs like 1.2MHz GBW and 240µA quiescent current. However, LM224ADR offers tighter input offset (±3mV vs. ±7mV), making it a performance upgrade without layout changes.
What is the ESD rating of the LM224ADR, and how does it impact board handling?
The LM224ADR has a Human-Body Model (HBM) ESD rating of 500V, as confirmed in Section 6.2 of the TI datasheet. This requires standard ESD controls during assembly - grounded workstations, wrist straps, and static-dissipative packaging - but does not meet enhanced 2kV HBM requirements of newer B-series variants like LM324B. Field reliability in unshielded environments may benefit from local TVS protection.
Is the LM224ADR suitable for driving capacitive loads, and what is the maximum value?
Yes, the LM224ADR is characterized to drive capacitive loads up to 100pF while maintaining stability, as stated in Section 6.5 under "CLOAD". Beyond this, phase margin degrades and risk of oscillation increases. For loads >100pF (e.g., long cables or LCD bias networks), external isolation resistance (e.g., 10–100Ω in series with output) is recommended to preserve loop stability.
LM224ADR 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
LM224ADR FAQ
1.How can I place an order for LM224ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224ADR 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 LM224ADR reliable?
The price and inventory of LM224ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224ADR is usually 5 days.
3.What payment methods are accepted for LM224ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224ADR?
LM224ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224ADR 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 LM224ADR?
For technical support, including LM224ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224ADR requirements.
6.How does Aetrix verify that LM224ADR is sourced from the original manufacturer or authorized distributors?
All LM224ADR 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 LM224ADR meets industry standards.
7.What is the process for return or replacement of LM224ADR?
All LM224ADR units undergo pre-shipment inspection (PSI). If there is an issue with LM224ADR, 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 LM224ADR part is unused and in its original packaging.
Return procedure for LM224ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224ADR Tags
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