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Texas Instruments LM324KADRG4
- Part No.:
- LM324KADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM324KADRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
LM324KADRG4 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 (common-mode range includes V–), 36V max supply voltage, ±3mV max input offset voltage at 25°C, 1.2MHz gain-bandwidth product, and 240µA typical quiescent current per amplifier-enabling precision signal conditioning in power supply feedback loops.
For engineers reviewing the LM324KADRG4 datasheet, LM324KADRG4 pinout, LM324KADRG4 application, or LM324KADRG4 equivalent, this page provides verified pin functions, real-world use cases in AC inverters and multi-function printers, key electrical specs including output swing to within 1.5V of V+ and 100mV of V– at 1mA, and two validated drop-in alternatives with documented thermal and ESD differences.
Technical Context
The LM324KADRG4 belongs to the legacy LM324 family and shares the same internal architecture as LM324, LM324A, and LM324K variants-featuring four independent high-voltage op amps with common-emitter output stages. It operates over 0°C to 70°C ambient temperature and supports single-supply operation down to 3V with input common-mode range extending to the negative rail.
Unlike the B/BA versions, LM324KADRG4 does not include integrated RF/EMI filters or enhanced 2kV HBM ESD protection; its ESD rating is 500V HBM per JEDEC JS-001. Its open-loop gain is 25 V/mV minimum across full temperature range, and it achieves unity-gain stability without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports wide-input industrial and consumer power rails without level-shifting |
| Input Offset Voltage (max) | ±7mV at 25°C - sets baseline DC error in sensor amplification or comparator hysteresis circuits |
| Gain-Bandwidth Product | 1.2MHz - enables stable closed-loop gain up to ~120 at 10kHz for audio or control loop filtering |
| Quiescent Current (per amp) | 0.7–1.2mA total (four amps) - allows battery-backed monitoring with sub-mA standby draw |
| Output Swing (1mA load) | V+ – 1.5V / V– + 0.1V - permits direct interfacing with 3.3V logic when powered from 5V supply |
| Common-Mode Input Range | 0V to VCC – 1.5V - enables ground-referenced sensing in single-supply systems |
| ESD Rating (HBM) | 500V - meets basic handling requirements for non-automotive assembly lines |
Pinout & Package
LM324KADRG4 is housed in a 14-pin SOIC (D package), 8.65mm × 6mm body size, with standard pinout compatible across LM324-series variants. The package uses gull-wing leads, Pb-free matte tin lead finish, and is rated for surface-mount reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | Inverting Input (–) | Accepts differential input signals; referenced to local ground or feedback network |
| 2, 6, 10, 12 | Non-inverting Input (+) | High-impedance node for reference or sensor input; CMVR extends to V– |
| 3, 7, 8, 14 | Output | Class-AB push-pull stage capable of sourcing/sinking ±20mA; limited short-circuit duty |
| 4 | VCC+ | Positive supply rail; must be decoupled with ≥0.1µF ceramic near pin |
| 11 | VCC– | Negative supply or system ground; forms return path for all four amplifiers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input capability | Common-mode range includes V–, enabling ground-sensing in single-supply configurations without level shifters |
| Unity-gain stable | No external compensation required for gains ≥1, simplifying design of buffers and active filters |
| Low input bias current | Max –250nA at 25°C - minimizes voltage error across high-impedance sensor bridges or photodiode nodes |
| High channel separation | 120dB crosstalk attenuation - preserves signal integrity in multi-channel data acquisition with shared supply |
| Wide supply range | Operates from 3V to 30V - eliminates need for separate LDOs in mixed-voltage embedded systems |
Applications
| Power Supply Feedback Control | Multi-Function Printer Sensor Interface |
|---|---|
Use Scenario: Regulating output voltage in offline AC-DC adapters using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference, driving optocoupler LED via transconductance stage. Use Value: ±7mV offset ensures <±1% regulation accuracy across line/load; rail-to-rail input accommodates 2.5V reference without biasing resistors. | Use Scenario: Amplifying low-level analog signals from paper jam sensors, toner density detectors, and fuser temperature thermistors. IC Role / Device Role / Timing Role: Signal conditioner converting mV-level sensor outputs into clean 0–3.3V logic-compatible levels for MCU ADC input. Use Value: 1.2MHz GBW supports fast response to paper motion events; 0.7–1.2mA total IQ enables always-on status monitoring without draining backup battery. |
| AC Inverter Motor Control | Desktop PC Motherboard Monitoring |
Use Scenario: Isolating and scaling current-sense signals from IGBT gate drivers in 3-phase inverter legs. IC Role / Device Role / Timing Role: High-side current sense amplifier with external gain resistors, feeding isolated sigma-delta modulator inputs. Use Value: 30V max supply withstands transient spikes on motor bus; 120dB channel separation prevents cross-talk between phase currents during PWM switching. | Use Scenario: Monitoring +12V, +5V, +3.3V, and Vcore rails on ATX motherboards for hardware shutdown and BIOS alerting. IC Role / Device Role / Timing Role: Quad comparator configured as voltage supervisor, each channel dedicated to one rail with hysteresis. Use Value: Single SOIC-14 package replaces four discrete comparators, reducing board area by >60%; V–-referenced inputs simplify resistor-divider networks tied to ground. |
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 K-suffix temperature screening | Lacks extended reliability screening for long-life industrial deployments | Select when cost sensitivity outweighs lifetime validation needs in commercial-grade equipment |
| LM2902KDR | SOIC-14, –40°C to +125°C operating range, 500V HBM ESD, but lower open-loop gain (15 V/mV min) | Better thermal robustness for automotive under-hood or outdoor HVAC control boards | Choose where ambient exceeds 70°C and DC precision is secondary to temperature resilience |
Compared with LM324DR and LM2902KDR, LM324KADRG4 offers tighter initial offset (±7mV vs ±7mV for DR, ±7mV for KDR) and higher guaranteed open-loop gain (25 V/mV min), making it preferable for closed-loop stability in precision analog front-ends where temperature stays within 0–70°C.
Availability
LM324KADRG4 is available at Aetrix Electronics and suitable for AC inverters, multi-function printers, and desktop PC motherboards requiring stable component supply across extended production cycles.
Supply support for LM324KADRG4 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 decades of heritage in precision op amp design and manufacturing.
The LM324 family was engineered for cost-effective, general-purpose analog signal conditioning in industrial, computing, and consumer electronics-prioritizing broad supply voltage tolerance, rail-compatible inputs, and proven reliability over ultra-low noise or speed.
FAQ
What is the maximum operating temperature range for LM324KADRG4?
The LM324KADRG4 is specified for operation from 0°C to +70°C ambient temperature. This range is confirmed in TI's SLOS066AE datasheet Section 6.3, where "LM324xx" devices-including LM324K-are explicitly listed with 0°C to 70°C as the recommended operating free-air temperature. It is not rated for industrial (–40°C to +125°C) or military temperature grades.
Does LM324KADRG4 support rail-to-rail output swing?
No, LM324KADRG4 does not provide rail-to-rail output. Per datasheet Section 6.7, its output swing is typically VCC – 1.5V on the positive side and VCC– + 5mV to 20mV on the negative side at full load. At 1mA sink current, the low-side output reaches ~0.75V above VCC–, limiting dynamic range in low-voltage single-supply designs.
Is LM324KADRG4 pin-compatible with LM324B or LM324BA?
Yes, LM324KADRG4 shares identical SOIC-14 pinout and basic functionality with LM324B and LM324BA, but it is not a drop-in replacement due to key specification differences: LM324B offers ±3mV max offset (vs ±7mV), 2kV HBM ESD (vs 500V), and integrated EMI filtering. Electrical compatibility requires verification of gain, bandwidth, and noise requirements in the target circuit.
What is the typical quiescent current consumption of LM324KADRG4?
The LM324KADRG4 draws 0.7–1.2mA total supply current for all four amplifiers under no-load conditions, as specified in Section 6.7 of the datasheet. This equates to ~240–300µA per amplifier at 25°C and 5V supply-making it suitable for always-on monitoring functions where average current budget is constrained to sub-milliamp levels.
Can LM324KADRG4 be used in single-supply configurations with ground-referenced inputs?
Yes, LM324KADRG4 supports true single-supply operation with inputs referenced to ground. Its common-mode input voltage range extends to V– (i.e., ground when VCC– = 0V), and output can swing within ~100mV of ground at light loads. This enables direct connection of sensors like thermistors or bridge transducers without input biasing networks.
LM324KADRG4 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
LM324KADRG4 FAQ
1.How can I place an order for LM324KADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324KADRG4 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 LM324KADRG4 reliable?
The price and inventory of LM324KADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324KADRG4 is usually 5 days.
3.What payment methods are accepted for LM324KADRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324KADRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324KADRG4?
LM324KADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324KADRG4 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 LM324KADRG4?
For technical support, including LM324KADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324KADRG4 requirements.
6.How does Aetrix verify that LM324KADRG4 is sourced from the original manufacturer or authorized distributors?
All LM324KADRG4 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 LM324KADRG4 meets industry standards.
7.What is the process for return or replacement of LM324KADRG4?
All LM324KADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM324KADRG4, 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 LM324KADRG4 part is unused and in its original packaging.
Return procedure for LM324KADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324KADRG4 Tags
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LM358DT
STMicroelectronics
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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
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MCP6006T-E/OT
Microchip Technology
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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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