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Texas Instruments LM224DG4
- Part No.:
- LM224DG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224DG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
LM224DG4 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 robust output drive (±20mA per channel). It operates from 3V to 36V supply, delivers 1.2MHz gain-bandwidth, 0.5V/μs slew rate, and achieves ±3mV max input offset voltage at 25°C - enabling precision signal conditioning in power supplies, motor controls, and sensor interfaces.
For engineers reviewing the LM224DG4 datasheet, LM224DG4 pinout, LM224DG4 application, or LM224DG4 equivalent, this page provides verified electrical specifications, validated SOIC-14 pin mapping, real-world use cases in AC inverters and multi-function printers, and two confirmed drop-in alternatives with documented thermal and ESD performance differences.
Technical Context
The LM224DG4 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 voltage tolerance up to ±32V. Its internal architecture supports unity-gain stability without external compensation and features low quiescent current (700μA typical for all four amplifiers).
It uses bipolar input stages with NPN transistors, resulting in input bias currents of –20nA to –250nA (typ/max at 25°C), and exhibits open-loop gain of 25–100 V/mV across temperature. The device lacks integrated EMI filtering or enhanced ESD protection found in B-series variants (e.g., LM324B), confirming its baseline industrial-grade specification set.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports single-supply operation down to 3V logic rails and high-voltage industrial bus monitoring up to 36V. |
| Input Offset Voltage (max) | ±3mV at 25°C - enables DC-coupled sensor amplification with ≤3mV error before trimming. |
| Gain-Bandwidth Product | 1.2MHz - sufficient for closed-loop gains up to 120 at 10kHz or unity-gain stable audio and control loop applications. |
| Slew Rate | 0.5V/μs - limits full-scale step response time to ~20μs for 10V output swing, suitable for slow-to-moderate dynamics. |
| Output Current (source/sink) | ±20mA per amplifier - drives 150Ω loads directly or interfaces with discrete transistor stages without buffering. |
| Common-Mode Input Range | Includes V– (ground in single-supply) - allows direct sensing of signals referenced to system ground, e.g., current-sense shunt amplification. |
| Quiescent Current (total) | 0.7–1.2mA - enables low-power operation in battery-backed systems or always-on monitoring circuits. |
Pinout & Package
LM224DG4 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 assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input | Negative feedback node for Channel 1; accepts signals down to V– (ground in single-supply mode). |
| 1IN+ (Pin 3) | Non-inverting input | Reference or signal input for Channel 1; common-mode range includes V–. |
| 1OUT (Pin 1) | Output | Amplified output of Channel 1; capable of sourcing/sinking ±20mA into resistive loads. |
| VCC+ (Pin 4) | Positive supply | Primary power rail (3–36V); connects to system VDD or VCC bus. |
| VCC– (Pin 11) | Negative supply / ground | Lowest potential node; tied to GND in single-supply configurations. |
| 2IN– (Pin 6), 2IN+ (Pin 5), 2OUT (Pin 7) | Channel 2 I/O | Identical functionality to Channel 1; fully independent amplifier stage. |
| 3IN– (Pin 9), 3IN+ (Pin 10), 3OUT (Pin 8) | Channel 3 I/O | Independent third amplifier; pinout symmetry simplifies PCB layout reuse. |
| 4IN– (Pin 13), 4IN+ (Pin 12), 4OUT (Pin 14) | Channel 4 I/O | Fourth independent amplifier; enables multi-channel signal conditioning on one IC. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Accepts inputs at V– (ground), eliminating level-shifting needs for low-side current sensing and single-supply sensor interfaces. |
| High-voltage operation (3–36V) | Supports direct connection to 24V industrial buses or 36V solar input stages without external regulators or dividers. |
| Unity-gain stable architecture | Enables buffer, follower, and integrator configurations without external compensation components - reducing BOM count and layout area. |
| Four independent amplifiers | Integrates signal conditioning, reference buffering, comparator hysteresis, and active filtering functions in one SOIC-14 footprint. |
| Robust output short-circuit protection | Withstands indefinite output-to-ground shorts at TA ≤ 25°C and VCC ≤ 15V - improves field reliability in motor driver feedback paths. |
Applications
| Power Supply Monitoring | Multi-Function Printer Engine Control |
|---|---|
Use Scenario: Real-time monitoring of +12V and +24V rails in ATX PSUs and server power modules using resistive divider networks. IC Role / Device Role / Timing Role: Precision DC amplifier configured as difference amplifier to reject common-mode noise and scale rail voltages for ADC input. Use Value: ±3mV offset ensures <0.1% measurement error at 12V, while 36V absolute max rating protects against transient overvoltage events. | Use Scenario: Closed-loop control of paper feed motors, fuser heater regulation, and toner density sensing in office MFPs. IC Role / Device Role / Timing Role: Four-channel analog front-end: two channels condition thermistor signals, one buffers reference voltage, one drives optocoupler inputs for isolation. Use Value: Single SOIC-14 replaces four discrete op amps, reducing board space by >60% and interconnect noise in noisy printer EMI environments. |
| AC Inverter Current Sensing | Home Appliance Motor Drive Feedback |
Use Scenario: Low-side shunt-based phase current measurement in 3-phase IGBT gate driver stages of residential solar inverters. IC Role / Device Role / Timing Role: High-common-mode-rejection instrumentation amplifier front-end (using two LM224DG4 op amps per channel) with gain = 50. Use Value: Input range including V– allows direct connection to shunt grounded at power stage source, avoiding costly isolated amplifiers. | Use Scenario: Speed and torque feedback conditioning in variable-frequency drives for washing machine drum motors and HVAC blower fans. IC Role / Device Role / Timing Role: Quad op amp implements PID controller integrator, derivative filter, error amplifier, and PWM comparator hysteresis generator. Use Value: Unity-gain stability and 1.2MHz GBW support 20kHz PWM carrier rejection while maintaining loop bandwidth >1kHz for responsive motor control. |
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 and baseline specs (±7mV offset, 0.5V/μs, 1.2MHz), but rated only for 0°C to 70°C ambient. | Limited to commercial-grade equipment (e.g., desktop PCs, chargers); not qualified for industrial (-25°C to 85°C) or extended-temp environments. | Select when cost is primary constraint and operating temperature stays within 0–70°C - avoids over-specifying for non-industrial use. |
| LM2902DR | SOIC-14 pin-compatible; wider temp range (-40°C to 125°C), same 3–36V supply, but higher input offset (±7mV max) and lower CMRR (50dB min vs. 65dB). | Better suited for automotive under-hood or industrial motor control where extended temperature operation is mandatory, despite reduced DC precision. | Choose for designs requiring guaranteed operation at -40°C or +125°C where LM224DG4's -25°C to +85°C rating is insufficient. |
Compared with LM324DR and LM2902DR, the LM224DG4 offers the optimal balance of industrial temperature range (-25°C to +85°C), moderate DC precision (±3mV offset), and proven reliability in AC inverter and appliance motor control - making it the preferred choice for cost-sensitive embedded systems needing assured performance beyond commercial grade but not requiring automotive qualification.
Availability
LM224DG4 is available at Aetrix Electronics and suitable for power supply monitoring, multi-function printer engine control, and AC inverter current sensing requiring stable component supply across industrial production cycles.
Supply support for LM224DG4 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 LM224DG4 belongs to TI's foundational LMx24 quad op amp product line, engineered for high-voltage, general-purpose analog signal conditioning in cost-driven industrial systems where reliability, wide supply range, and design simplicity are prioritized over ultra-low noise or rail-to-rail output.
FAQ
What is the maximum operating temperature range for the LM224DG4?
The LM224DG4 is specified for operation from –25°C to +85°C ambient temperature. This industrial-grade range exceeds commercial LM324 variants (0°C to 70°C) and supports deployment in enclosed power supplies, motor drives, and home appliances where internal board temperatures exceed room ambient. Full electrical performance, including ±3mV input offset and 1.2MHz GBW, is guaranteed across this range.
Does the LM224DG4 support single-supply operation?
Yes, the LM224DG4 supports true single-supply operation because its common-mode input voltage range includes the negative rail (V–), which can be connected to ground. This allows direct amplification of signals referenced to system ground - such as shunt-based current sensing or thermistor bridges - without level-shifting circuitry. Output swing reaches within 1.5V of V+ and 20mV of V– under light load, enabling usable dynamic range in 5V or 12V systems.
Is the LM224DG4 pin-compatible with other LMx24 family members?
Yes, the LM224DG4 uses the standard 14-pin SOIC (D) package with identical pinout to LM324DR, LM2902DR, and LM224D - confirmed by TI's Pin Configuration and Functions table (Figure 5-1). All share the same channel assignment: Pins 1/2/3 (Ch1), 5/6/7 (Ch2), 8/9/10 (Ch3), 12/13/14 (Ch4), with VCC+ at Pin 4 and VCC– at Pin 11. This enables direct substitution in existing layouts without PCB revision.
What is the typical quiescent current consumption of the LM224DG4?
The LM224DG4 draws 0.7–1.2mA total quiescent current across all four amplifiers at room temperature, translating to ~240–300μA per amplifier. At 36V supply and +85°C, current rises to ≤3mA (750μA per amp), remaining well below competing rail-to-rail or low-power op amps. This makes it suitable for always-on monitoring circuits where standby power must stay under 30mW per channel.
Can the LM224DG4 drive capacitive loads directly?
The LM224DG4 is characterized to safely drive up to 100pF capacitive loads without oscillation, as specified in the "Capacitive load drive" parameter. For larger loads (e.g., long cables or ADC input capacitance >100pF), an isolation resistor (10–100Ω) between output and load is recommended to maintain phase margin >56° and prevent peaking or instability. This capability supports direct interface with SAR ADCs and filtered sensor outputs without added buffer stages.
LM224DG4 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:
- 20 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 40 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
LM224DG4 FAQ
1.How can I place an order for LM224DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224DG4 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 LM224DG4 reliable?
The price and inventory of LM224DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224DG4 is usually 5 days.
3.What payment methods are accepted for LM224DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224DG4?
LM224DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224DG4 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 LM224DG4?
For technical support, including LM224DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224DG4 requirements.
6.How does Aetrix verify that LM224DG4 is sourced from the original manufacturer or authorized distributors?
All LM224DG4 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 LM224DG4 meets industry standards.
7.What is the process for return or replacement of LM224DG4?
All LM224DG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM224DG4, 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 LM224DG4 part is unused and in its original packaging.
Return procedure for LM224DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224DG4 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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