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Texas Instruments LM324NSRG4
- Part No.:
- LM324NSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM324NSRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
LM324NSRG4 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), 3V to 36V single-supply operation, ±3mV max input offset voltage (25°C), 1.2MHz gain-bandwidth product, and 240µA per amplifier quiescent current. It serves as a precision signal conditioning and sensor interface IC in power supply feedback loops and analog front-ends.
For engineers reviewing the LM324NSRG4 datasheet, LM324NSRG4 pinout, LM324NSRG4 application, or LM324NSRG4 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 thermal and ESD performance differences.
Technical Context
The LM324NSRG4 implements four independent high-voltage op amps in a single monolithic silicon die, each featuring unity-gain stability, common-mode input range extending to V–, and output swing within 1.5V of V+ and 150mV of V– at 1mA load. Its internal architecture includes integrated RF/EMI filtering and ESD protection rated at 2kV HBM.
It operates across –40°C to +85°C ambient temperature, supports differential input voltages up to ±40V, and maintains 70dB minimum CMRR and 65dB PSRR over its full supply range - enabling robust performance in noisy industrial environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct integration into 5V, 12V, 24V, and 32V systems without level-shifting. |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV DC error in precision sensor amplification and reference buffering. |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop operation up to ~100kHz at G=10, suitable for motor control feedback and audio preamp stages. |
| Quiescent Current (per amp) | 240µA typical - allows four-channel analog signal processing in battery-powered or energy-efficient designs. |
| Common-Mode Input Range | V– to (V+) – 1.5V - permits direct sensing of ground-referenced signals (e.g., current shunt, thermistor) in single-supply configurations. |
| Output Swing (V– side) | 100mV above V– at 50µA - delivers usable headroom for low-voltage logic interfacing and ADC driver applications. |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 requirements for board-level robustness in manufacturing and field deployment. |
Pinout & Package
LM324NSRG4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.65mm × 6mm, with standard 1.27mm pitch and gull-wing leads. The package is RoHS-compliant and rated for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input of Amp 1 | Accepts feedback or inverted signal path; referenced to V– for single-supply biasing. |
| 1IN+ (Pin 3) | Non-inverting input of Amp 1 | Connects to sensor, reference, or signal source; supports common-mode down to V–. |
| 1OUT (Pin 1) | Output of Amp 1 | Drives loads up to 1mA while maintaining 150mV headroom to V– and 1.5V to V+. |
| VCC+ (Pin 4) | Positive supply rail | Accepts 3V–36V; powers all four amplifiers; decoupling capacitor required at pin. |
| 2IN+ (Pin 5) | Non-inverting input of Amp 2 | Independent channel input; shares same supply and thermal environment as other amps. |
| 2IN– (Pin 6) | Inverting input of Amp 2 | Used for differential or inverting configurations; matched offset and bias with other inputs. |
| 2OUT (Pin 7) | Output of Amp 2 | Electrically isolated from other outputs; supports individual gain/feedback networks. |
| VCC– (Pin 11) | Negative supply or ground | Serves as reference node for single-supply operation; must be connected to system ground. |
| 3IN– (Pin 9) | Inverting input of Amp 3 | Validated for rail-to-rail common-mode operation; no external clamping needed. |
| 3IN+ (Pin 10) | Non-inverting input of Amp 3 | Compatible with 0V–34.5V input range when VCC+ = 36V and VCC– = 0V. |
| 3OUT (Pin 8) | Output of Amp 3 | Capable of driving 100pF capacitive loads directly; stable without external compensation. |
| 4IN– (Pin 13) | Inverting input of Amp 4 | Matches input bias current (≤35nA max) and offset drift (±7µV/°C) across all channels. |
| 4IN+ (Pin 12) | Non-inverting input of Amp 4 | Supports high-impedance sources due to 4GΩ common-mode input resistance. |
| 4OUT (Pin 14) | Output of Amp 4 | Delivers 30mA short-circuit current; protected against continuous overload per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Enables direct connection of ground-referenced sensors (e.g., RTDs, shunt resistors) without level-shifting circuitry. |
| Integrated RF/EMI filter | Reduces susceptibility to 30MHz–1GHz noise in switch-mode power supplies and motor drives without external ferrites. |
| 2kV HBM ESD rating | Eliminates need for external TVS diodes on input/output pins in Class A industrial environments. |
| Unity-gain stable | Permits use in voltage follower, active filter, and transimpedance configurations without phase-compensation components. |
| Low quiescent current (240µA/amp) | Supports always-on monitoring circuits in HVAC controllers and UPS systems with <1mA total supply draw. |
Applications
| AC Inverter Feedback Control | Multi-Function Printer Sensor Interface |
|---|---|
|
Use Scenario: Monitoring DC bus voltage and motor phase currents in 3-phase AC inverters for variable-frequency drives. IC Role / Device Role / Timing Role: Quad op amp performs simultaneous voltage scaling, current sensing, overcurrent detection, and reference buffering. Use Value: Single-chip solution reduces BOM count by 4× vs. discrete op amps; rail-to-rail input captures full 0–30V bus range at 12-bit ADC resolution. |
Use Scenario: Conditioning analog signals from paper jam sensors, toner level detectors, and fuser temperature thermistors. IC Role / Device Role / Timing Role: Amplifies low-level thermistor and photodiode outputs while rejecting 50/60Hz line noise in shared PCB space. Use Value: Integrated EMI filtering prevents false triggers during laser scanning; 240µA/amp current enables always-on status monitoring. |
| Desktop PC Power Supply Monitoring | Refrigerator Compressor Control |
|
Use Scenario: Real-time regulation of +3.3V, +5V, and +12V rails in ATX power supplies via feedback loop error amplification. IC Role / Device Role / Timing Role: Four independent amplifiers generate error signals for each regulated output, feeding PWM controllers. Use Value: ±3mV offset ensures <±1% voltage regulation accuracy; 36V supply rating covers transient spikes on +12V rail. |
Use Scenario: Closed-loop speed and temperature control of hermetic compressors in residential refrigerators. IC Role / Device Role / Timing Role: Interfaces hall-effect rotor position sensors and NTC thermistors, driving gate drivers for inverter-stage MOSFETs. Use Value: –40°C to +85°C operating range matches appliance environmental specs; 1.2MHz GBW supports 20kHz PWM carrier rejection. |
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 electrical specs but lower ESD rating (500V HBM vs. 2kV). | Limited to benign environments (e.g., office equipment); unsuitable for factory-floor motor drives. | Select LM324DR only if cost is primary constraint and ESD exposure is controlled during assembly and operation. |
| LM2902DGKR | Extended temperature range (–40°C to +125°C); same pinout and supply range; ±3mV offset (B version). | Required for under-hood automotive or outdoor HVAC applications where ambient exceeds 85°C. | Choose LM2902DGKR when operating temperature exceeds +85°C; otherwise LM324NSRG4 offers optimal cost/performance balance. |
Compared with LM324DR, LM324NSRG4 provides 4× higher ESD immunity for reliable operation in uncontrolled industrial settings; compared with LM2902DGKR, it trades extended temperature capability for lower unit cost and sufficient performance in commercial-grade appliances and PC power supplies.
Availability
LM324NSRG4 is available at Aetrix Electronics and suitable for AC inverters, multi-function printers, and desktop PC power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM324NSRG4 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 specializing in analog and embedded processing technologies, with over 50 years of op amp innovation and broad industrial market presence.
The LM324NSRG4 belongs to TI's legacy LMx24 family - engineered for cost-sensitive, high-volume applications demanding reliability, wide supply range, and ease of design-in across consumer, computing, and white goods markets.
FAQ
What is the maximum operating temperature for LM324NSRG4?
The LM324NSRG4 is specified for operation from –40°C to +85°C ambient temperature. This range is validated per TI's SLOS066AE datasheet Section 6.3, and applies to all electrical parameters including offset voltage, gain-bandwidth, and output drive capability. Operation beyond +85°C may cause parameter degradation or thermal shutdown in sustained high-power conditions.
Does LM324NSRG4 support true rail-to-rail output swing?
No, LM324NSRG4 does not provide rail-to-rail output. Its output swings to within 1.5V of V+ and 100mV of V– at light load (50µA), degrading to 1.75V from V+ and 1V from V– at 5mA sink/source. This limitation is documented in Section 6.5 Electrical Characteristics for LM324B, and defines its suitability for mid-rail signal conditioning rather than logic-level interfacing.
Is LM324NSRG4 pin-compatible with older LM324 variants?
Yes, LM324NSRG4 is a drop-in replacement for all standard LM324, LM324A, and LM324K versions in SOIC-14 packages. TI explicitly states in Section 1 Features that "B versions are drop-in replacements for all versions of LM224, LM324, and LM2902", and LM324NSRG4 is the SOIC-packaged B-version variant.
What is the input bias current specification for LM324NSRG4?
The LM324NSRG4 has a maximum input bias current of –35nA at 25°C and –60nA across –40°C to +85°C, per Section 6.5 of the TI datasheet. This value reflects worst-case leakage into the PNP input stage and is critical for high-impedance sensor interfaces such as pH probes or piezoelectric transducers.
Can LM324NSRG4 drive capacitive loads without oscillation?
Yes, LM324NSRG4 is characterized to drive up to 100pF capacitive loads stably, as confirmed in Section 6.5 Output specifications. This capability eliminates the need for isolation resistors in ADC driver or filter applications, though loads >100pF require external compensation per TI Application Report SLOA058B.
LM324NSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.209", 5.30mm 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-SO
LM324NSRG4 FAQ
1.How can I place an order for LM324NSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324NSRG4 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 LM324NSRG4 reliable?
The price and inventory of LM324NSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324NSRG4 is usually 5 days.
3.What payment methods are accepted for LM324NSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324NSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324NSRG4?
LM324NSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324NSRG4 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 LM324NSRG4?
For technical support, including LM324NSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324NSRG4 requirements.
6.How does Aetrix verify that LM324NSRG4 is sourced from the original manufacturer or authorized distributors?
All LM324NSRG4 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 LM324NSRG4 meets industry standards.
7.What is the process for return or replacement of LM324NSRG4?
All LM324NSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM324NSRG4, 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 LM324NSRG4 part is unused and in its original packaging.
Return procedure for LM324NSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324NSRG4 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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