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STMicroelectronics LM224D
- Part No.:
- LM224D
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224D.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:788
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Product details
Overview
LM224D from STMicroelectronics is a quad low-power operational amplifier in SO14 package, designed for single-supply operation from 3 V to 30 V or dual supplies ±1.5 V to ±15 V. It delivers 1.3 MHz gain bandwidth, 100 dB large-signal voltage gain, and input common-mode range extending to ground - enabling precision signal conditioning in battery-powered sensor interfaces and industrial analog front-ends.
For engineers reviewing the LM224D datasheet, LM224D pinout, LM224D application, or LM224D equivalent, key selection criteria include its 375 µA/amplifier supply current, 20 nA input bias current, 3 mV max input offset voltage (LM224A variant), rail-to-rail output swing capability, and robust ESD rating (250 V HBM).
Technical Context
The LM224D implements internally compensated voltage-feedback topology with PNP input stage, supporting true single-supply operation where the input common-mode voltage includes ground. Its open-loop gain remains stable across temperature (–40 °C to +105 °C) and supply voltage (3–30 V), with thermal resistance of 103 °C/W (SO14) ensuring reliable performance in compact PCB layouts.
Each of the four independent amplifiers features unity-gain-stable operation, 0.4 V/µs slew rate, and output drive capability of ±40 mA (source/sink), with channel separation >120 dB at 1 kHz - critical for multi-channel instrumentation and mixed-signal systems requiring minimal crosstalk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.3 MHz - supports stable closed-loop gain up to ~100× at 10 kHz without phase margin loss |
| Input Offset Voltage (max) | 5 mV @ 25 °C - sets minimum resolvable DC signal difference in precision amplification |
| Supply Current per Amplifier | 375 µA - enables ultra-low-power operation in always-on sensor nodes and portable devices |
| Input Bias Current (typ) | 20 nA - minimizes voltage error across high-impedance source networks (e.g., pH sensors, photodiodes) |
| Common-Mode Input Range | 0 V to VCC – 1.5 V - allows direct interfacing with ground-referenced transducers and ADC drivers |
| Output Short-Circuit Duration | Infinite - permits safe operation under sustained overload without latch-up or damage |
| ESD Rating (HBM) | 250 V - meets basic industrial handling requirements; not automotive-grade |
Pinout & Package
LM224D is housed in a 14-pin SOIC (SO14) package with standard 1.27 mm pitch, 8.75 mm × 4.0 mm body size, and exposed pad not present (unlike QFN variant). Pin 4 is VCC– (ground in single-supply mode), Pin 11 is VCC+, and each amplifier has dedicated inverting/non-inverting inputs and output pins arranged per industry-standard quad op-amp layout.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output; capable of sourcing/sinking ±40 mA into resistive loads |
| 2 | Inverting Input A | Differential input node for channel A; accepts signals down to ground level |
| 3 | Non-inverting Input A | Reference input for channel A; matched bias current minimizes offset drift |
| 4 | VCC– / GND | Negative supply rail; used as ground reference in single-supply configurations |
| 5 | Non-inverting Input B | Channel B positive input; electrically isolated from other channels |
| 6 | Inverting Input B | Channel B negative input; supports differential gain configurations |
| 7 | Output B | Amplifier B output; identical drive strength and voltage swing to Pin 1 |
| 8 | Output C | Amplifier C output; shares same thermal and supply characteristics as other outputs |
| 9 | Inverting Input C | Channel C inverting input; compatible with active filter and integrator topologies |
| 10 | Non-inverting Input C | Channel C non-inverting input; supports high-Z buffer and summing applications |
| 11 | VCC+ | Positive supply rail; operates from 3 V to 30 V; decoupling required near Pin 11 |
| 12 | Non-inverting Input D | Channel D reference input; enables independent signal conditioning paths |
| 13 | Inverting Input D | Channel D differential input; supports DC-coupled comparator and threshold detection |
| 14 | Output D | Amplifier D output; fully functional with same AC/DC specs as other channels |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | Operates from 3 V to 30 V single supply or ±1.5 V to ±15 V dual supply - eliminates need for separate rail generators |
| Ground-Sensing Inputs | Input common-mode range includes 0 V - enables direct connection to thermocouples, strain gauges, and current-sense shunts |
| Low Power Consumption | 1.2 mA total supply current at 5 V - extends battery life in portable medical and IoT edge devices |
| High Open-Loop Gain | 100 dB typical - ensures <0.1% gain error in 100× amplification stages with 10 kΩ feedback networks |
| Robust Output Stage | ±40 mA output drive with infinite short-circuit duration - tolerates accidental wiring faults in industrial control panels |
Applications
| Industrial Sensor Signal Conditioning | Portable Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from RTDs, thermocouples, and load cells in PLC analog input modules. IC Role / Device Role / Timing Role: Quad amplifier provides simultaneous gain, filtering, and level-shifting for four independent sensor channels. Use Value: Input common-mode range to ground and 5 mV max Vio enable accurate cold-junction compensation and 12-bit ADC interface without trimming. |
Use Scenario: Front-end signal processing in handheld multimeters, environmental monitors, and wearable health sensors. IC Role / Device Role / Timing Role: Configured as transimpedance amplifier for photodiode current conversion and buffer for electrode-based biosensors. Use Value: 375 µA/amplifier supply current and rail-to-rail output swing maximize dynamic range while minimizing quiescent power draw from coin-cell batteries. |
| AC-Coupled Audio Pre-Amplification | Multi-Channel Active Filtering |
|
Use Scenario: First-stage amplification of microphone or piezoelectric transducer signals in voice-activated edge devices. IC Role / Device Role / Timing Role: Inverting amplifier with 10 kΩ input impedance and 100× gain, AC-coupled via 10 µF capacitor. Use Value: 1.3 MHz GBP and 0.4 V/µs slew rate support clean amplification of 20 Hz–20 kHz audio band with <0.015% THD at 2 Vpp output. |
Use Scenario: Implementing 4-pole bandpass filters for vibration analysis in predictive maintenance gateways. IC Role / Device Role / Timing Role: Each amplifier configured as 2nd-order Sallen-Key stage; cascaded for sharp roll-off and noise rejection. Use Value: Channel separation >120 dB prevents inter-channel coupling in multi-frequency spectral analysis, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM224APT | TSSOP14 package (5.0 × 6.4 mm); 100 °C/W thermal resistance; identical electrical specs | Better suited for space-constrained PCBs; requires finer pitch soldering but offers improved thermal dissipation vs SO14 | Select when board area is limited and reflow profile supports 0.65 mm pitch components |
| TSB572IDT | 36 V supply range; 1.8 MHz GBP; 120 µA/amplifier supply current; 1.5 mV Vio max; AEC-Q100 qualified | Automotive and high-voltage industrial use; lower power and higher accuracy than LM224D | Choose for new designs targeting extended voltage range, lower drift, or automotive qualification |
Compared with LM224D, LM224APT offers identical analog performance in a smaller footprint but higher assembly cost, while TSB572IDT delivers superior accuracy and efficiency at higher voltage rails - making it suitable for next-generation designs where legacy compatibility is not required.
Availability
LM224D is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation, AC-coupled audio pre-amplification, and multi-channel active filtering requiring stable component supply across long production lifecycles.
Supply support for LM224D 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for smart driving, power management, and analog/mixed-signal applications.
The LM224x series belongs to ST's general-purpose analog op-amp portfolio, engineered for cost-sensitive industrial and consumer systems requiring reliable DC precision and wide supply flexibility without automotive-grade overhead.
FAQ
Can LM224D operate from a single 3.3 V supply?
Yes. LM224D is fully specified for single-supply operation from 3 V to 30 V. At 3.3 V, it maintains usable output swing (typically 0.1 V to 3.1 V with 10 kΩ load), 1.3 MHz GBP, and input common-mode range from 0 V to 1.8 V - sufficient for low-voltage sensor buffering and comparator applications.
Does LM224D have rail-to-rail input or output capability?
LM224D features rail-to-rail output swing but not rail-to-rail input. Its input common-mode range extends to ground (0 V) but stops at VCC – 1.5 V. This allows ground-referenced inputs but prohibits direct connection of signals near the positive rail without attenuation or level-shifting.
What is the maximum capacitive load LM224D can drive stably?
LM224D is unity-gain stable and characterized with 100 pF capacitive load in standard test conditions. For loads >100 pF, a series resistor (typically 10–100 Ω) between output and capacitance is recommended to maintain phase margin and prevent oscillation - especially in high-gain configurations.
Is LM224D pin-compatible with LM324 or LM2902?
Yes. LM224D shares identical SO14 pinout and core electrical specifications with LM324 (commercial temp range) and LM2902 (automotive grade). However, LM224D is rated for –40 °C to +105 °C operation and has different ESD ratings (250 V HBM vs 700 V for LM224W), so thermal and reliability validation is required for cross-substitution.
LM224D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LM224D FAQ
1.How can I place an order for LM224D through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224D 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 LM224D reliable?
The price and inventory of LM224D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224D is usually 5 days.
3.What payment methods are accepted for LM224D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224D?
LM224D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224D 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 LM224D?
For technical support, including LM224D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224D requirements.
6.How does Aetrix verify that LM224D is sourced from the original manufacturer or authorized distributors?
All LM224D 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 LM224D meets industry standards.
7.What is the process for return or replacement of LM224D?
All LM224D units undergo pre-shipment inspection (PSI). If there is an issue with LM224D, 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 LM224D part is unused and in its original packaging.
Return procedure for LM224D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224D 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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