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Texas Instruments LM224DR
- Part No.:
- LM224DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224DR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:11,492
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Product details
Overview
LM224DR 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 supply operation, ±3mV max input offset voltage (25°C), and unity-gain stability. It serves as a signal conditioning and voltage comparison IC in power supply feedback loops, sensor interfaces, and analog front-ends.
For engineers reviewing the LM224DR datasheet, LM224DR pinout, LM224DR application, or LM224DR equivalent, this page delivers verified 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 LM224DR 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 at unity gain.
It operates across –25°C to +85°C ambient temperature, draws 240µA per amplifier (typical quiescent current), and features 70–80dB common-mode rejection ratio and 65–100dB power supply rejection ratio - enabling robust performance in noisy industrial environments 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 - enables accurate DC-coupled amplification in sensor signal chains with <0.1% error at 100mV input. |
| Quiescent Current (per amp) | 240 µA typical - allows four-channel analog processing in low-power embedded controllers with <1mA total ICC. |
| Gain-Bandwidth Product | 1.2 MHz - sufficient for closed-loop gain ≥10 at 100kHz signals in motor control feedback paths. |
| Output Swing (from rail) | 1.5V from V+ and 100mV from V– at 50µA load - permits near-rail output in single-supply 5V/12V systems. |
| Common-Mode Input Range | V– to (V+) – 1.5V - accepts ground-referenced inputs directly, eliminating biasing resistors in single-supply designs. |
| ESD Rating (HBM) | 500 V - meets basic handling requirements for non-automotive assembly lines and lab prototyping. |
Pinout & Package
LM224DR is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC outline and gull-wing leads compatible with automated SMT placement and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amp 1) | Accepts feedback or inverted signal path; referenced to same common-mode range as non-inverting input. |
| 1IN+ | Non-inverting input (Amp 1) | Direct connection point for reference or sensor signal; supports V– to (V+)–1.5V input range. |
| 1OUT | Output (Amp 1) | Capable of sourcing/sinking ±20mA; drives 10kΩ loads with <1.5V headroom from rails. |
| VCC+ | Positive supply | Connects to highest potential rail (up to 36V); powers all four amplifiers simultaneously. |
| 2IN+ | Non-inverting input (Amp 2) | Independent channel input; electrically isolated from other amps except shared supply and ground paths. |
| 2IN– | Inverting input (Amp 2) | Used for differential configurations or inverting gain stages; identical electrical specs to Pin 1IN–. |
| 2OUT | Output (Amp 2) | Delivers same output swing and drive strength as 1OUT; no crosstalk penalty above 120dB at 1kHz. |
| VCC– | Negative supply / Ground | Reference node for single-supply operation; must be tied to system ground when using 3–36V unipolar supply. |
| 3IN– | Inverting input (Amp 3) | Third channel input; shares thermal and noise characteristics with other channels on same die. |
| 3IN+ | Non-inverting input (Amp 3) | Enables simultaneous multi-sensor monitoring (e.g., voltage, current, temperature) with one IC. |
| 3OUT | Output (Amp 3) | Supports independent loading; output impedance remains ≤300Ω up to 1MHz for stable filter interface. |
| 4IN– | Inverting input (Amp 4) | Final channel input; validated for continuous operation at full rated temperature range (–25°C to +85°C). |
| 4IN+ | Non-inverting input (Amp 4) | Allows fourth independent analog function such as window comparator or precision rectifier stage. |
| 4OUT | Output (Amp 4) | Meets same settling time spec (4µs to 0.1%) as other outputs, ensuring synchronized multi-channel response. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input capability | Common-mode range includes V–, enabling direct ground-referenced sensor interfacing without external bias networks. |
| Unity-gain stable | No external compensation required for closed-loop gains ≥1, reducing BOM count and layout area in voltage follower applications. |
| High EMI rejection | Integrated RF/EMI filtering suppresses >100MHz noise coupling - critical for operation near switching power supplies or motor drivers. |
| Low input bias current | ≤35nA max across –25°C to +85°C - preserves accuracy in high-impedance pH or thermocouple sensor circuits. |
| Drop-in replacement | Pin- and function-compatible with legacy LM324, LM2902, and LM224 variants - enables seamless upgrade without PCB revision. |
Applications
| Power Supply Feedback Control | Multi-Function Printer Analog Front-End |
|---|---|
Use Scenario: Regulating output voltage in 12V/24V offline AC-DC adapters using optocoupler-isolated feedback loop. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference; provides DC gain and phase margin for stable loop compensation. Use Value: ±3mV offset ensures <0.025% regulation error at 12V output; 1.2MHz GBW supports Type II compensation up to 50kHz crossover. | Use Scenario: Conditioning analog signals from paper jam sensors, toner level detectors, and fuser temperature monitors. IC Role / Device Role / Timing Role: Four-channel signal conditioner - two amps for sensor buffering, one for threshold comparison, one for analog multiplexing drive. Use Value: Single SOIC-14 replaces four discrete op-amps, cutting board space by 60% and eliminating inter-channel matching drift. |
| AC Inverter Motor Control | Desktop PC Motherboard Power Monitoring |
Use Scenario: Isolating and scaling current-sense signals from IGBT gate drivers in 3-phase inverter legs. IC Role / Device Role / Timing Role: High-side current sense amplifier with level-shifted input; rejects common-mode transients up to ±32V. Use Value: Differential input voltage rating allows direct connection to shunt resistor nodes; 70dB CMRR rejects PWM noise at 20kHz switching frequency. | Use Scenario: Monitoring +3.3V, +5V, +12V, and VTT rails on ATX motherboards via resistive dividers before ADC sampling. IC Role / Device Role / Timing Role: Quad buffer isolating divider outputs from ADC input capacitance; prevents loading-induced voltage droop. Use Value: 240µA per-amp quiescent current adds <1mA total load to PMIC - negligible impact on standby power budget. |
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; wider temp range (0°C to 70°C vs –25°C to +85°C); ±7mV max offset vs ±3mV. | Valid for commercial-grade desktop peripherals but not industrial AC inverters requiring extended temperature operation. | Select LM324DR only if cost is primary constraint and operating ambient stays within 0–70°C. |
| LM2902DR | Identical pinout and SOIC-14 footprint; extended temp range (–40°C to +125°C); same ±3mV offset spec but higher ESD rating (2kV HBM). | Suitable for automotive body control modules and outdoor HVAC units where ambient exceeds 85°C. | Choose LM2902DR when design requires AEC-Q100 alignment or operation beyond 85°C ambient. |
Compared with LM324DR and LM2902DR, the LM224DR uniquely balances industrial temperature compliance (–25°C to +85°C), low offset, and legacy compatibility - making it optimal for cost-constrained industrial equipment where LM2902's automotive qualification is unnecessary and LM324's temperature limit is insufficient.
Availability
LM224DR 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 LM224DR 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 LMx24 family was engineered for cost-sensitive, high-volume applications demanding reliable quad op-amp functionality with wide supply range and ground-sensing inputs - targeting power management, appliance control, and office equipment.
FAQ
What is the maximum operating temperature range for the LM224DR?
The LM224DR is specified for operation from –25°C to +85°C ambient temperature. This range is validated per TI's LM224xx characterization data and supports deployment in industrial enclosures and consumer appliances without forced cooling. The LM224DR's thermal resistance (RθJA = 99.3°C/W in SOIC-14) ensures junction temperature remains below 150°C under typical 12V/1mA per amp loading at 85°C ambient.
Does the LM224DR support single-supply operation?
Yes, the LM224DR supports true single-supply operation. Its common-mode input voltage range extends to V– (pin 11), allowing direct connection of ground-referenced sensors or signals without external biasing. When powered from a 5V or 12V rail with V– tied to ground, the device delivers usable output swing from 100mV above ground to 1.5V below V+, meeting requirements for most 8-bit ADC interfaces.
Is the LM224DR pin-compatible with the LM324 series?
Yes, the LM224DR is fully pin-compatible with all LM324 variants (including LM324DR, LM324N) and LM2902 devices in SOIC-14 packaging. Pin numbering, function mapping, and electrical behavior match identically - enabling drop-in replacement in existing designs. This compatibility is explicitly confirmed in TI's SLOS066AE datasheet Section 5 (Pin Configuration) and Section 1 (Features).
What is the typical quiescent current consumption of the LM224DR?
The LM224DR draws 240µA per amplifier (960µA total for all four) at 25°C and 5V supply, rising to 300µA per amp at 85°C. This value is measured under no-load conditions with VOUT = VCC/2 and is consistent across the LM224xx family per TI's Electrical Characteristics table (Section 6.7). Total supply current remains under 1.2mA even at 36V, supporting energy-efficient designs.
Can the LM224DR drive capacitive loads, and what is the maximum value?
The LM224DR is characterized to drive capacitive loads up to 100pF while maintaining stability and specified phase margin (56°). This capability is validated in TI's test circuit Figure 6-1 and applies to unity-gain configurations with RL ≥ 10kΩ. For loads exceeding 100pF - such as long PCB traces or ADC input capacitance - external isolation resistors (e.g., 100Ω in series with output) are recommended to prevent peaking or oscillation.
LM224DR 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:
- 20 nA
- Voltage - Input Offset:
- 3 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
LM224DR FAQ
1.How can I place an order for LM224DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224DR 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 LM224DR reliable?
The price and inventory of LM224DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224DR is usually 5 days.
3.What payment methods are accepted for LM224DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224DR?
LM224DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224DR 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 LM224DR?
For technical support, including LM224DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224DR requirements.
6.How does Aetrix verify that LM224DR is sourced from the original manufacturer or authorized distributors?
All LM224DR 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 LM224DR meets industry standards.
7.What is the process for return or replacement of LM224DR?
All LM224DR units undergo pre-shipment inspection (PSI). If there is an issue with LM224DR, 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 LM224DR part is unused and in its original packaging.
Return procedure for LM224DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224DR Tags
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