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Texas Instruments LM324ADRG4
- Part No.:
- LM324ADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM324ADRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
LM324ADRG4 from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive single-supply applications. It delivers rail-to-rail input (V– to V+ − 1.5V), ±3 mV max input offset voltage at 25°C, 1.2 MHz gain-bandwidth product, and 240 µA per amplifier quiescent current. It is widely deployed in power supply feedback loops, sensor signal conditioning, and industrial control interfaces.
For engineers reviewing the LM324ADRG4 datasheet, LM324ADRG4 pinout, LM324ADRG4 application, or LM324ADRG4 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 drop-in alternatives with documented thermal and ESD differences.
Technical Context
The LM324ADRG4 belongs to the legacy LM324 family - not the newer B/BA versions - and operates across 3V to 30V supply range with guaranteed performance from 0°C to 70°C ambient. Its input stage supports common-mode voltage down to V–, enabling true single-supply operation without level-shifting circuitry.
It features unity-gain stability, 100 dB PSRR, 80 dB CMRR, and 120 dB channel separation at 1–20 kHz. Output swing reaches within 1.5 V of V+ and 20 mV of V– under 1 mA load, making it suitable for driving analog comparators, transducer buffers, and low-voltage ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - supports wide-input industrial and consumer power rails without external regulators |
| Input Offset Voltage (max) | ±3 mV at 25°C - enables accurate DC-coupled amplification in sensor bridges and current-sense circuits |
| Gain-Bandwidth Product | 1.2 MHz - sufficient for anti-aliasing filters, audio preamps, and closed-loop PSU error amplifiers |
| Quiescent Current (per amp) | 240 µA typical - allows four independent op-amps in battery-powered or energy-conscious systems |
| Common-Mode Input Range | V– to (V+ − 1.5 V) - permits direct interfacing with ground-referenced sensors and DAC outputs |
| Output Swing (V– side) | 20 mV above V– at 1 mA - ensures reliable low-side detection in shunt-based current monitoring |
| ESD Rating (HBM) | ±500 V - meets basic handling requirements for non-automotive assembly environments |
Pinout & Package
LM324ADRG4 uses a 14-pin SOIC (D package), 8.65 mm × 6 mm body size, with exposed pad not present. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives feedback networks or downstream analog stages |
| 2 | IN− A | Inverting input for Amp A - connects to summing nodes or resistor dividers |
| 3 | IN+ A | Non-inverting input for Amp A - accepts sensor signals or reference voltages |
| 4 | VCC+ | Positive supply rail - shared by all four amplifiers; decoupling required near pin |
| 5 | IN+ B | Non-inverting input for Amp B - used for independent signal paths or dual-channel buffering |
| 6 | IN− B | Inverting input for Amp B - configurable as comparator or differential receiver |
| 7 | OUT B | Amplifier B output - isolated from Amp A for multi-function board layout |
| 8 | OUT C | Amplifier C output - supports third-stage gain or auxiliary control loop |
| 9 | IN− C | Inverting input for Amp C - enables cascaded filtering or active compensation |
| 10 | IN+ C | Non-inverting input for Amp C - referenced to system ground or bias network |
| 11 | VCC− | Negative supply or ground - must be connected even in single-supply configurations |
| 12 | IN+ D | Non-inverting input for Amp D - accommodates fourth sensor channel or reference buffer |
| 13 | IN− D | Inverting input for Amp D - used in precision difference amplification or null detection |
| 14 | OUT D | Amplifier D output - completes quad functionality for full analog subsystem integration |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes V–, eliminating need for negative bias in single-supply sensor interfaces |
| Unity-gain stable architecture | Enables direct use in voltage followers and integrators without external compensation |
| High channel separation (120 dB) | Prevents crosstalk between independent signal chains on same die, critical for multi-channel data acquisition |
| Low quiescent current (240 µA/amp) | Supports always-on monitoring functions in HVAC controllers and smart appliance subsystems |
| Robust short-circuit protection | Withstands indefinite output-to-ground shorts at ≤15 V supply, enhancing field reliability |
Applications
| Power Supply Feedback Loop | Multi-Function Printer Sensor Interface |
|---|---|
|
Use Scenario: Regulating output voltage in offline AC-DC adapters using optocoupler-coupled error amplification. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference, driving optocoupler LED current. Use Value: Input common-mode range extending to ground allows direct connection to resistive divider tied to VOUT, reducing component count and improving accuracy over temperature. |
Use Scenario: Conditioning thermistor, paper jam, and toner level signals in MFP mainboard. IC Role / Device Role / Timing Role: Quad buffer/amplifier providing gain, offset correction, and noise rejection before ADC sampling. Use Value: Four independent amplifiers in one SOIC-14 reduce PCB area vs discrete solutions while maintaining isolation between analog domains. |
| AC Inverter Motor Control | Desktop PC Power Management |
|
Use Scenario: Amplifying current-sense shunt voltages and scaling DC-link voltage for microcontroller ADC inputs. IC Role / Device Role / Timing Role: Precision signal conditioner converting millivolt-level shunt drops into 0–3.3 V range for MCU sampling. Use Value: ±3 mV max offset ensures <1% error in 100 mV full-scale current sensing, meeting IEC 61800-3 Class A EMC requirements. |
Use Scenario: Monitoring +12 V, +5 V, and +3.3 V rails in ATX motherboard VRM supervision circuits. IC Role / Device Role / Timing Role: Comparator and reference buffer supporting power-good sequencing and fault detection logic. Use Value: Guaranteed operation up to 30 V supply allows direct connection to unregulated 12 V rail without external LDO, simplifying power tree design. |
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, but rated for 0°C to 70°C only; no G4 suffix indicating green/RoHS-compliant finish | No functional difference in room-temperature consumer designs; lacks halogen-free certification for export compliance | Select LM324DR only if RoHS-6 and lead-free plating are not required by end-market regulations |
| LM2902DR | Wider operating temperature range (−40°C to +125°C); otherwise identical electrical specs and SOIC-14 footprint | Required for automotive cabin modules, outdoor HVAC units, and industrial motor drives exposed to extended thermal cycling | Choose LM2902DR when ambient exceeds 70°C or when AEC-Q200 stress testing is mandated |
Compared with LM324ADRG4, LM324DR offers identical performance without environmental compliance, while LM2902DR extends thermal capability at no pinout or layout change - making both viable alternatives depending on regulatory and environmental requirements.
Availability
LM324ADRG4 is available at Aetrix Electronics and suitable for power supplies, multi-function printers, and desktop PC motherboards requiring stable component supply, long-term manufacturability, and RoHS-6 compliance.
Supply support for LM324ADRG4 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 design support infrastructure.
The LM324 series was engineered for general-purpose analog signal conditioning in cost-constrained, high-volume applications - emphasizing ease of use, robustness, and compatibility across decades of legacy designs.
FAQ
What is the maximum supply voltage rating for LM324ADRG4?
The absolute maximum supply voltage for LM324ADRG4 is 32 V, but its recommended operating range is 3 V to 30 V. Exceeding 30 V risks exceeding internal junction temperature limits under load, especially in SOIC packages with higher thermal resistance. Always observe derating curves in the TI SLOS066AE datasheet for sustained operation above 24 V.
Does LM324ADRG4 support rail-to-rail output swing?
No, LM324ADRG4 does not provide rail-to-rail output. Its output swings to within 1.5 V of V+ and as low as 20 mV above V– at 1 mA load. This limitation means it cannot drive loads directly to the positive rail, requiring careful headroom planning in precision reference buffers or active filter stages where full-scale swing is needed.
Can LM324ADRG4 replace LM324N in existing PDIP-based designs?
LM324ADRG4 cannot be directly substituted for LM324N without PCB modification: LM324N uses 14-pin PDIP (19.3 mm × 9.4 mm), while LM324ADRG4 is SOIC-14 (8.65 mm × 6 mm). Though electrically compatible and pinout-identical, the package change requires rework or redesign. For drop-in replacement, use LM324ADR - same SOIC package without the G4 suffix.
What is the input bias current specification for LM324ADRG4 at 85°C?
At 85°C, LM324ADRG4 exhibits a maximum input bias current of –300 nA (typical –20 nA at 25°C). This increase impacts high-impedance sensor interfaces - for example, a 1 MΩ source impedance introduces up to 300 mV of offset error. Use lower source impedances or consider LM324B variants (<50 nA max across –40°C to +125°C) for elevated-temperature precision.
Is LM324ADRG4 qualified for automotive applications?
No, LM324ADRG4 is not AEC-Q200 qualified. It is rated for 0°C to 70°C operation and lacks automotive-grade screening, burn-in, or failure rate reporting. For automotive cabin or under-hood use, TI recommends LM2902DR (–40°C to +125°C, AEC-Q100 Grade 2) or LM2902QDRQ1 (AEC-Q100 Grade 1), both in SOIC-14 and pin-compatible.
LM324ADRG4 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:
- 15 nA
- Voltage - Input Offset:
- 2 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
LM324ADRG4 FAQ
1.How can I place an order for LM324ADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324ADRG4 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 LM324ADRG4 reliable?
The price and inventory of LM324ADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324ADRG4 is usually 5 days.
3.What payment methods are accepted for LM324ADRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324ADRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324ADRG4?
LM324ADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324ADRG4 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 LM324ADRG4?
For technical support, including LM324ADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324ADRG4 requirements.
6.How does Aetrix verify that LM324ADRG4 is sourced from the original manufacturer or authorized distributors?
All LM324ADRG4 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 LM324ADRG4 meets industry standards.
7.What is the process for return or replacement of LM324ADRG4?
All LM324ADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM324ADRG4, 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 LM324ADRG4 part is unused and in its original packaging.
Return procedure for LM324ADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324ADRG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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