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STMicroelectronics LM324AWDT
- Part No.:
- LM324AWDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM324AWDT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
LM324AWDT 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 industrial sensor interfaces and 24 V PLC analog front-ends.
For engineers reviewing the LM324AWDT datasheet, LM324AWDT pinout, LM324AWDT application, or LM324AWDT equivalent, key selection criteria include its 3 mV max input offset voltage (25 °C), 700 V HBM ESD rating, rail-to-rail output swing capability, and guaranteed operation across 0 °C to 70 °C ambient temperature.
Technical Context
This device integrates four independent high-gain op-amps with internal frequency compensation and rail-to-rail output stage. Its input stage uses PNP transistors enabling true ground-sensing common-mode operation, while the output stage supports sourcing up to 40 mA and sinking ≥12 mA at 0.2 V.
The LM324AWDT implements enhanced ESD protection (700 V HBM, 1.5 kV CDM) and improved input offset voltage specification (3 mV max at 25 °C) over standard LM324 variants - achieved via process and trimming optimizations without altering core architecture or pin compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain bandwidth product | 1.3 MHz - sets usable small-signal bandwidth for unity-gain stable configurations up to ~1.3 MHz |
| Input offset voltage (25 °C) | 3 mV max - enables DC-coupled amplification of µV–mV-level sensor signals with ≤0.3% initial error |
| Supply voltage range | Single: 3 V to 30 V - supports direct interface with 5 V, 12 V, and 24 V industrial rails without level-shifting |
| Input common-mode range | 0 V to (VCC − 1.5 V) - allows direct sensing of ground-referenced transducer outputs |
| Output current (sink/source) | ≥12 mA sink at 0.2 V, ≥20 mA source at 2 V - drives 10 kΩ loads or LED indicators directly |
| ESD rating (HBM) | 700 V - exceeds IEC 61000-4-2 Level 2 for robustness in factory-floor environments |
| Quiescent current per amp | 375 µA - enables 4-channel analog signal conditioning in battery-powered or energy-constrained systems |
Pinout & Package
LM324AWDT is supplied in SO14 (Small Outline 14-pin) package with standard 1.27 mm pitch, 8.55–8.75 mm body length, and 3.80–4.00 mm width. The exposed pad is absent - unlike QFN16 variants - making it compatible with legacy through-hole and surface-mount reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output - rail-to-rail capable, drives 2 kΩ load to within 20 mV of VCC or ground |
| 2 | Inverting input A | High-impedance (20 nA bias) PNP input - accepts signals down to ground with no phase reversal |
| 3 | Non-inverting input A | Same topology as Pin 2 - used for non-inverting gain stages or comparator reference inputs |
| 4 | VCC− (GND) | Ground reference for single-supply operation - also serves as negative rail in dual-supply mode |
| 5 | Non-inverting input B | Independent channel input - electrically isolated from other channels; shares same VCC/GND pins |
| 6 | Inverting input B | Matches Pin 2 characteristics - supports differential pair configuration with matched resistors |
| 7 | Output B | Amplifier B output - identical AC/DC specs to Pin 1; enables multi-stage filtering or signal routing |
| 8 | VCC+ | Positive supply rail - accepts 3–30 V; quiescent current remains stable across full range |
| 9 | Output C | Third amplifier output - used for active biasing, level shifting, or auxiliary signal generation |
| 10 | Inverting input C | Supports cascaded gain stages - e.g., instrumentation amp first stage followed by filtering |
| 11 | Non-inverting input C | Enables DC-coupled summing or averaging functions with precise resistor matching |
| 12 | Non-inverting input D | Fourth channel input - commonly used for reference voltage buffering or fault detection thresholds |
| 13 | Inverting input D | Allows comparator-style zero-crossing detection when paired with external hysteresis resistors |
| 14 | Output D | Final amplifier output - drives LEDs, relays, or ADC reference buffers with low output impedance |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Common-mode range includes 0 V - eliminates need for level-shifting circuitry in single-supply sensor interfaces |
| Enhanced ESD protection | 700 V HBM rating - improves reliability during PCB handling and system integration in industrial settings |
| Low input offset drift | 7–30 µV/°C - maintains accuracy over temperature in unregulated enclosures or outdoor deployments |
| Rail-to-rail output swing | Within 20 mV of VCC and GND - maximizes dynamic range for 10-bit+ ADC interfacing without external clamping |
| Quad-channel integration | Four independent amps in one SO14 package - reduces board space vs. discrete op-amp solutions by >60% |
Applications
| Industrial Sensor Signal Conditioning | PLC Analog Input Module |
|---|---|
Use Scenario: Amplifying low-level mV outputs from RTDs, thermocouples, and strain gauges in factory automation systems. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with adjustable gain and DC-coupled offset correction. Use Value: 3 mV max Vio ensures <0.5% measurement error at 0.6 V full-scale; ground-sensing input avoids external bias networks. | Use Scenario: Converting 4–20 mA current loop signals to 0–5 V or 0–10 V for microcontroller ADC sampling. IC Role / Device Role / Timing Role: Transimpedance amplifier + buffer + level shifter in multi-channel analog input card. Use Value: 30 V max supply supports direct connection to 24 V PLC backplane; 1.3 MHz GBW enables anti-aliasing filter design up to 100 kHz. |
| Automotive Body Control Unit | Medical Patient Monitor Front-End |
Use Scenario: Monitoring battery voltage, cabin temperature, and door switch status in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Voltage supervisor, temperature signal conditioner, and digital input debouncer. Use Value: 700 V HBM withstands ESD events near vehicle harness connectors; 375 µA/amp extends sleep-mode battery life. | Use Scenario: Amplifying ECG, pulse oximeter, and respiration sensor signals prior to digitization. IC Role / Device Role / Timing Role: Low-noise preamplifier (40 nV/√Hz), right-leg drive buffer, and lead-off detection comparator. Use Value: 20 nA input bias current minimizes electrode polarization errors; 0–70 °C rating covers clinical operating environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324WDT | Same SO14 package, 250 V HBM ESD rating, 5 mV max Vio (25 °C) | Lacks enhanced ESD and tighter offset spec - suitable for cost-sensitive, non-industrial environments | Select when ESD immunity >700 V and sub-3 mV offset are not required |
| TSB572IDT | 36 V supply, 1.8 MHz GBW, 150 µV max Vio, 2.5 mA supply current per amp | Higher precision and speed but consumes >6× more power - requires thermal derating in dense layouts | Choose for high-accuracy, wide-supply applications where power budget allows |
Compared with LM324WDT, LM324AWDT provides superior ESD robustness and lower initial offset for industrial signal chains; versus TSB572IDT, it trades precision and bandwidth for ultra-low power and proven legacy compatibility in cost-constrained designs.
Availability
LM324AWDT is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC analog input modules, automotive body control units, and medical patient monitor front-ends requiring stable component supply and long-term obsolescence management.
Supply support for LM324AWDT 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 industrial automation.
The LM324x series belongs to ST's general-purpose analog portfolio, engineered for reliable, low-cost signal conditioning in cost-sensitive industrial and consumer systems operating from 3 V to 30 V rails.
FAQ
What is the maximum operating temperature for LM324AWDT?
The LM324AWDT is rated for operation from 0 °C to 70 °C ambient temperature. This commercial-grade specification aligns with typical industrial control cabinet and indoor medical equipment environments. Junction temperature must remain below 150 °C under all conditions, with thermal resistance junction-to-ambient of 103 °C/W in SO14 package.
Can LM324AWDT operate from a single 3.3 V supply?
Yes - LM324AWDT supports single-supply operation down to 3 V. At 3.3 V, it maintains functional input common-mode range (0 V to 1.8 V), rail-to-rail output swing (within 20 mV of rails), and 1.3 MHz gain bandwidth. Output drive capability reduces to ~10 mA sink/source, sufficient for driving 10 kΩ loads or microcontroller inputs.
Does LM324AWDT have rail-to-rail input capability?
No - LM324AWDT features rail-to-rail *output*, but its input common-mode range extends only to (VCC − 1.5 V) on the upper end and includes ground (0 V) on the lower end. Inputs must remain ≥0.3 V above VCC− and ≤(VCC+ − 1.5 V) to avoid phase reversal or increased offset error.
How does the 700 V HBM ESD rating impact system-level design?
The 700 V HBM rating means LM324AWDT can survive electrostatic discharges typical of manual PCB handling and connector mating in factory environments - reducing need for external TVS diodes on op-amp inputs in non-harsh ESD zones. It does not replace IEC 61000-4-2 system-level surge protection for field-deployed interfaces.
LM324AWDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.3 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LM324AWDT FAQ
1.How can I place an order for LM324AWDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324AWDT 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 LM324AWDT reliable?
The price and inventory of LM324AWDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324AWDT is usually 5 days.
3.What payment methods are accepted for LM324AWDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324AWDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324AWDT?
LM324AWDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324AWDT 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 LM324AWDT?
For technical support, including LM324AWDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324AWDT requirements.
6.How does Aetrix verify that LM324AWDT is sourced from the original manufacturer or authorized distributors?
All LM324AWDT 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 LM324AWDT meets industry standards.
7.What is the process for return or replacement of LM324AWDT?
All LM324AWDT units undergo pre-shipment inspection (PSI). If there is an issue with LM324AWDT, 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 LM324AWDT part is unused and in its original packaging.
Return procedure for LM324AWDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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