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Texas Instruments LM324DRG3
- Part No.:
- LM324DRG3
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM324DRG3.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,691
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Product details
Overview
LM324DRG3 from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications. It delivers rail-to-rail input (common-mode down to V–), 36V max supply range, ±3mV max input offset voltage (25°C), 1.2MHz gain-bandwidth product, and 240µA typical quiescent current per amplifier - enabling precision signal conditioning in single-supply systems such as power supply monitoring and sensor interfaces.
For engineers reviewing the LM324DRG3 datasheet, LM324DRG3 pinout, LM324DRG3 application, or LM324DRG3 equivalent, this page provides verified electrical specifications, validated SOIC-14 pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM324DRG3 implements four independent high-voltage op amps in a single monolithic IC, each featuring unity-gain stability, common-mode input range extending to the negative rail, and output swing within 1.5V of the positive rail at 1mA load. Its internal architecture supports operation from 3V to 36V single supply or ±18V dual supply.
It integrates EMI/RF filtering and achieves 2kV HBM ESD rating, making it suitable for electrically noisy environments like motor drives and HVAC control boards. The device is drop-in compatible with legacy LM324 variants but improves on offset voltage, temperature drift, and quiescent current consistency across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial power rails without external regulation |
| Input Offset Voltage (max) | ±3 mV at 25°C - enables accurate DC-coupled amplification in sensor front-ends |
| Gain-Bandwidth Product | 1.2 MHz - sufficient for anti-aliasing filters and low-frequency closed-loop control |
| Quiescent Current (per amp) | 240 µA typical - allows battery-backed or energy-efficient designs with four channels active |
| Common-Mode Input Range | V– to (V+) – 1.5V - permits direct sensing of ground-referenced signals in single-supply systems |
| Output Swing (from rail) | 1.5V from V+ (at 1mA), 100mV from V– (at 50µA) - improves dynamic range near supply limits |
| ESD Rating (HBM) | 2 kV - meets IEC 61000-4-2 Level 2 for board-level robustness |
Pinout & Package
LM324DRG3 uses the D (SOIC-14) package: 8.65mm × 6mm body, 1.27mm pitch, gull-wing leads. Pin 1 is marked by a beveled corner or dot; pin count proceeds counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input | Negative feedback node for amplifier A; accepts signals down to V– |
| 1IN+ (Pin 3) | Non-inverting input | Reference or sensor input for amplifier A; common-mode range includes V– |
| 1OUT (Pin 1) | Amplifier A output | Drives loads up to 10mA; swing limited to ~1.5V below V+ and ~0.1V above V– |
| VCC+ (Pin 4) | Positive supply | Connects to highest potential rail (3V–36V); powers all four amplifiers |
| 2IN+ (Pin 5) | Non-inverting input | Input for amplifier B; electrically isolated from other channels |
| 2IN– (Pin 6) | Inverting input | Feedback node for amplifier B; shares same input bias current spec (≤35nA) |
| 2OUT (Pin 7) | Amplifier B output | Independent output; no crosstalk >120dB at 1–20kHz |
| VCC– (Pin 11) | Negative supply / ground | Reference for single-supply operation; must be connected even when used as ground |
| 3IN– (Pin 9) | Inverting input | Input for amplifier C; identical specs to Pins 2 and 6 |
| 3IN+ (Pin 10) | Non-inverting input | Input for amplifier C; supports differential input up to full supply voltage |
| 3OUT (Pin 8) | Amplifier C output | Capable of driving 100pF capacitive loads directly |
| 4IN– (Pin 13) | Inverting input | Input for amplifier D; validated for continuous operation at VCM = V– |
| 4IN+ (Pin 12) | Non-inverting input | Input for amplifier D; matched offset and bias performance with other channels |
| 4OUT (Pin 14) | Amplifier D output | Final channel output; same slew rate (0.5 V/µs) and settling time (4 µs to 0.1%) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– inclusive) | Enables direct interfacing with 0V-referenced sensors (e.g., thermistors, current shunts) without level-shifting circuitry |
| Integrated EMI/RF filter | Reduces susceptibility to switching noise from nearby DC-DC converters or motor drivers without external RC networks |
| 2kV HBM ESD rating | Eliminates need for discrete TVS diodes in assembly-line handling and field-deployed equipment |
| Drop-in replacement for LM324/LM2902 | Preserves existing PCB layouts and firmware while improving offset drift (±7 µV/°C) and supply rejection (100 dB PSRR) |
| Low quiescent current (240 µA/amp) | Supports always-on monitoring circuits in UPS and HVAC controllers without compromising battery life |
Applications
| Power Supply Monitoring | Multi-function Printer Engine Control |
|---|---|
Use Scenario: Real-time voltage supervision of 12V/24V DC rails in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Quad op amp configured as comparator bank and error amplifier in feedback loops. Use Value: Single-chip solution replaces four discrete comparators, reducing BOM count and layout area while maintaining ±3mV trip accuracy across temperature. | Use Scenario: Toner density regulation, paper path feedback, and fuser temperature sensing in laser MFPs. IC Role / Device Role / Timing Role: Signal conditioning for analog photodiode, thermistor, and motor current feedback channels. Use Value: Common-mode input to V– allows direct connection to grounded sensors; 1.2MHz GBW ensures stable loop response for servo control. |
| AC Inverter Motor Control | Desktop PC Motherboard Health Monitoring |
Use Scenario: Current sensing and DC-link voltage scaling in 1–5kW residential solar inverters. IC Role / Device Role / Timing Role: Isolation-amplifier front-end stage and analog multiplexer driver for ADC inputs. Use Value: 36V supply tolerance accommodates 400V DC-link with resistive divider; EMI filtering suppresses PWM switching noise at 16kHz. | Use Scenario: +3.3V, +5V, +12V rail monitoring and fan speed control via PWM generation in ATX motherboards. IC Role / Device Role / Timing Role: Voltage comparator and integrator in analog fan controller IC interface circuits. Use Value: Low 240µA/amp IQ minimizes loading on standby rails; SOIC-14 footprint fits tight motherboard routing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DT | Same SOIC-14 package; ±7mV max offset (vs. ±3mV), higher 350µA typical IQ, no integrated EMI filter | Limited to less demanding industrial controls where offset drift <±10µV/°C is acceptable | Select LM324DT only if legacy qualification data exists and cost sensitivity outweighs performance gains |
| LM2902DR | Identical pinout and SOIC-14 package; rated for –40°C to +125°C (vs. –40°C to +85°C), ±3mV offset, same 1.2MHz GBW | Suitable for under-hood automotive modules and outdoor HVAC units requiring extended temperature operation | Choose LM2902DR when ambient operating temperature exceeds +85°C or AEC-Q200 compliance is required |
Compared with LM324DT, LM324DRG3 offers tighter offset and lower power; compared with LM2902DR, it trades extended temperature range for marginally better ESD immunity and optimized PSRR - making LM324DRG3 ideal for commercial-grade power supplies and office equipment where cost, size, and noise immunity are prioritized over extreme temperature operation.
Availability
LM324DRG3 is available at Aetrix Electronics and suitable for merchant network power supplies, multi-function printers, and desktop PC motherboards requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM324DRG3 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, with over 50 years of op amp innovation and manufacturing excellence.
The LM324 family was engineered for cost-effective, general-purpose analog signal conditioning in industrial, consumer, and computing systems - emphasizing ease of use, wide supply range, and robustness in unregulated environments.
FAQ
What is the maximum supply voltage for LM324DRG3?
The absolute maximum supply voltage for LM324DRG3 is 40V, but the recommended operating range is 3V to 36V. Operation at 36V enables direct interface with 24V industrial buses and 32V telecom systems without external regulators. Exceeding 36V risks exceeding absolute maximum ratings and may degrade long-term reliability, especially at elevated temperatures.
Does LM324DRG3 support rail-to-rail input?
Yes, LM324DRG3 supports rail-to-rail input: its common-mode input voltage range extends to the negative supply rail (V–), allowing direct connection of grounded sensors. However, the upper limit is (V+) – 1.5V at 25°C and (V+) – 2V over full temperature range - so it does not support true rail-to-rail input at the positive rail. This design enables single-supply operation without level shifters for low-side sensing.
Is LM324DRG3 pin-compatible with older LM324 variants?
Yes, LM324DRG3 is pin-compatible with all standard SOIC-14 versions of LM324, LM324A, LM2902, and LM2902B. The D-package pinout matches TI's published SOIC-14 configuration exactly - including VCC– on Pin 11 and VCC+ on Pin 4. No PCB changes are required for drop-in replacement, though layout review is advised to confirm thermal relief and grounding for improved EMI performance.
What is the typical quiescent current per amplifier in LM324DRG3?
The typical quiescent current per amplifier in LM324DRG3 is 240 µA at 5V supply and 25°C, rising to 300 µA maximum across –40°C to +85°C. At 36V, typical current increases to 350 µA and maximum reaches 750 µA. This low IQ enables four-channel operation in space-constrained, low-power systems such as battery-backed UPS monitors and portable diagnostic tools.
Can LM324DRG3 drive capacitive loads?
Yes, LM324DRG3 is characterized to drive up to 100 pF capacitive loads without oscillation, as verified in TI's datasheet Figure 6-1 test setup. For loads exceeding 100 pF, a series resistor (typically 10–100Ω) between the output and capacitor is recommended to maintain phase margin >56° and prevent peaking or instability. This capability supports direct connection to ADC input capacitors and long PCB traces in sensor signal chains.
LM324DRG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM324DRG3 FAQ
1.How can I place an order for LM324DRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324DRG3 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 LM324DRG3 reliable?
The price and inventory of LM324DRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324DRG3 is usually 5 days.
3.What payment methods are accepted for LM324DRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324DRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324DRG3?
LM324DRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324DRG3 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 LM324DRG3?
For technical support, including LM324DRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324DRG3 requirements.
6.How does Aetrix verify that LM324DRG3 is sourced from the original manufacturer or authorized distributors?
All LM324DRG3 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 LM324DRG3 meets industry standards.
7.What is the process for return or replacement of LM324DRG3?
All LM324DRG3 units undergo pre-shipment inspection (PSI). If there is an issue with LM324DRG3, 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 LM324DRG3 part is unused and in its original packaging.
Return procedure for LM324DRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324DRG3 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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