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Texas Instruments LM324KPWR
- Part No.:
- LM324KPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM324KPWR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
LM324KPWR from Texas Instruments is a quad operational amplifier in TSSOP-14 package, designed for cost-sensitive industrial and consumer applications requiring rail-to-rail input (V– included) and 3V to 36V single-supply operation. It delivers ±3mV max input offset voltage, 1.2MHz gain-bandwidth product, 0.5V/μs slew rate, and 240μA per amplifier quiescent current at 5V supply.
For engineers reviewing the LM324KPWR datasheet, LM324KPWR pinout, LM324KPWR application, or LM324KPWR equivalent, this page provides verified pin functions, real-world use cases in power supplies and appliance control, confirmed thermal metrics for TSSOP-14, and two validated alternative parts with documented functional and temperature-range differences.
Technical Context
The LM324KPWR implements four independent high-voltage op-amps in a single monolithic IC, each featuring unity-gain stability, common-mode input range extending to V–, and output swing within 1.5V of V+ and 100mV of V– at light load. Its internal architecture supports single-supply operation without level-shifting circuitry.
It integrates RF/EMI filtering for robustness in noisy environments and achieves 2kV HBM ESD rating. The device operates across –40°C to +85°C ambient, with guaranteed performance over full supply range (3V–36V) and differential input voltage tolerance up to ±40V.
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 external regulators |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV DC error in precision sensor amplification or reference buffering |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop gain up to ~120 at 10kHz for signal conditioning |
| Slew Rate | 0.5V/μs - adequate for <10kHz sinusoidal signals and step responses in power supply feedback |
| Quiescent Current (per amp) | 240μA typical at 5V - allows four-channel operation at <1mA total, critical for battery-backed systems |
| Common-Mode Input Range | V– to (V+) – 1.5V - permits direct sensing of ground-referenced signals in single-supply configurations |
| Output Swing (V– side) | 100mV above V– at 50μA - enables low-voltage detection and comparator-like behavior near ground |
Pinout & Package
Packaged in 14-pin TSSOP (PW), the LM324KPWR measures 5mm × 6.4mm with exposed pad for thermal enhancement. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect | Unused terminals - must remain unconnected; no internal function or tie requirement |
| 2 | Inverting Input (Amp 1) | Negative input node for first op-amp - accepts signals down to V– |
| 3 | Non-inverting Input (Amp 1) | Positive input node for first op-amp - supports rail-to-rail common-mode range |
| 4 | Positive Supply (VCC+) | Main power rail - connects to highest supply voltage (3V–36V) |
| 6 | Non-inverting Input (Amp 2) | Positive input for second op-amp - electrically isolated from other channels |
| 9 | Inverting Input (Amp 2) | Negative input for second op-amp - shares same input stage specs as Pin 2 |
| 10 | Output (Amp 2) | Amplified output of second channel - drives loads up to 10mA sink/source |
| 12 | Output (Amp 3) | Third op-amp output - identical drive capability and voltage swing to Pin 10 |
| 13 | Inverting Input (Amp 3) | Negative input for third op-amp - matches Pin 2/9 electrical characteristics |
| 14 | Output (Amp 4) | Fourth op-amp output - fully independent, supports same GBW and slew rate |
| 15 | Inverting Input (Amp 4) | Negative input for fourth op-amp - completes quad configuration |
| 16 | Negative Supply / Ground | Reference node for single-supply operation - tied to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Enables direct interface with ground-referenced sensors and DAC outputs without level shifters |
| Integrated RF/EMI filter | Reduces susceptibility to 30MHz–1GHz noise in motor drives and switching power supplies |
| 2kV HBM ESD rating | Supports handling and assembly in standard manufacturing environments without special precautions |
| Unity-gain stable | Eliminates need for external compensation in voltage follower, buffer, or integrator designs |
| Low quiescent current (240μA/amp) | Permits always-on monitoring circuits in energy-constrained appliances and IoT edge nodes |
Applications
| Power Supply Feedback Control | Appliance Motor Interface |
|---|---|
Use Scenario: Regulating output voltage in 12V/24V AC-DC adapters and DC-DC converters using voltage divider + error amplifier topology. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference; configured as transconductance amplifier driving optocoupler or PWM controller. Use Value: ±3mV offset ensures <0.1% regulation error at 12V output; rail-to-rail input accommodates 0–2.5V reference without biasing. | Use Scenario: Conditioning hall-effect sensor signals and amplifying current-sense resistor voltages in washing machine drum motor drivers. IC Role / Device Role / Timing Role: Signal conditioner for analog feedback loops - low-noise amplification and level shifting prior to ADC sampling. Use Value: 35nV/√Hz input noise preserves SNR in sub-100mV current sensing; 1.2MHz GBW supports 20kHz PWM ripple rejection. |
| Industrial Sensor Signal Chain | Desktop PC Power Sequencing |
Use Scenario: Amplifying thermistor, RTD, or strain gauge outputs in HVAC control boards and factory automation I/O modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end - configured as non-inverting gain stage with matched resistors. Use Value: 70dB CMRR rejects common-mode noise from shared 24V bus; 240μA/amp IQ enables multi-channel sensing on low-power microcontrollers. | Use Scenario: Monitoring +12V, +5V, and +3.3V rails during motherboard power-up and generating reset signals via comparator configuration. IC Role / Device Role / Timing Role: Voltage supervisor/comparator - one amp per rail, comparing against precision reference diode. Use Value: Output swing to 100mV above ground ensures clean logic-low assertion to reset ICs; 0.5V/μs slew prevents false triggering on slow-rising rails. |
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 | SOIC-14 package (8.65mm × 6mm); identical electrical specs but higher RθJA (99.3°C/W vs 124.7°C/W) | Preferred for through-hole prototyping or legacy PCBs; less suitable for high-density surface-mount layouts | Select when board space allows larger footprint and thermal design accommodates higher junction rise |
| LM2902PW | Same TSSOP-14 package; extended temperature range (–40°C to +125°C) and ±2mV offset (BA version) | Required for automotive under-hood or industrial outdoor enclosures exceeding 85°C ambient | Choose for harsh-environment deployments where LM324KPWR's 85°C max ambient is insufficient |
Compared with LM324DR and LM2902PW, the LM324KPWR offers optimal balance of compact TSSOP packaging, industrial-grade temperature range, and proven reliability in cost-sensitive consumer and computing power systems - making it ideal for volume production where thermal margin and layout density are constrained.
Availability
LM324KPWR is available at Aetrix Electronics and suitable for merchant network power supplies, desktop PC motherboards, and indoor air conditioners requiring stable component supply across multi-year production cycles.
Supply support for LM324KPWR 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 for industrial, automotive, and personal electronics markets.
The LM324 family was engineered for general-purpose analog signal conditioning in cost-driven systems - emphasizing wide supply range, rail-to-rail input, and robustness in unregulated power environments.
FAQ
What is the maximum operating temperature for LM324KPWR?
The LM324KPWR is rated for operation from –40°C to +85°C ambient temperature. This range is validated per TI's SLOS066AE datasheet Section 6.3, and applies across its full 3V–36V supply range. Junction temperature must remain ≤150°C, requiring thermal design that accounts for its TSSOP-14 RθJA of 124.7°C/W.
Does LM324KPWR support single-supply operation?
Yes, LM324KPWR supports true single-supply operation. Its common-mode input range extends to V– (typically ground), and output swings to within 100mV of V– and 1.5V of V+ at light load. This allows direct interfacing with ground-referenced sensors and microcontroller ADCs without dual-rail supplies or level-shifting circuitry.
What is the input offset voltage specification for LM324KPWR?
The LM324KPWR has a maximum input offset voltage of ±3mV at 25°C, per TI's LM324B characterization data in Section 6.5 of SLOS066AE. Over the full –40°C to +85°C range, the max offset increases to ±4.0mV. This value is confirmed for the B-version family, which includes LM324KPWR as a TSSOP-packaged variant.
Can LM324KPWR drive capacitive loads?
LM324KPWR is characterized to safely drive up to 100pF capacitive loads, as specified in Section 6.5 under "CLOAD" parameter. Driving larger loads may cause instability or overshoot; for >100pF, external isolation resistance (e.g., 100Ω in series with output) is recommended to maintain phase margin ≥56°.
Is LM324KPWR pin-compatible with older LM324 variants?
Yes, LM324KPWR is a drop-in replacement for all standard LM324 versions in TSSOP-14 packaging. It maintains identical pinout, electrical behavior, and functionality per TI's documentation stating "B versions are drop-in replacements for all versions of LM224, LM324, and LM2902". No PCB changes are required when upgrading from LM324PWR or LM324APWR.
LM324KPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
LM324KPWR FAQ
1.How can I place an order for LM324KPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324KPWR 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 LM324KPWR reliable?
The price and inventory of LM324KPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324KPWR is usually 5 days.
3.What payment methods are accepted for LM324KPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324KPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324KPWR?
LM324KPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324KPWR 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 LM324KPWR?
For technical support, including LM324KPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324KPWR requirements.
6.How does Aetrix verify that LM324KPWR is sourced from the original manufacturer or authorized distributors?
All LM324KPWR 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 LM324KPWR meets industry standards.
7.What is the process for return or replacement of LM324KPWR?
All LM324KPWR units undergo pre-shipment inspection (PSI). If there is an issue with LM324KPWR, 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 LM324KPWR part is unused and in its original packaging.
Return procedure for LM324KPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324KPWR 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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