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Texas Instruments LM324KPW
- Part No.:
- LM324KPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM324KPW.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
LM324KPW 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), 3V to 36V single-supply operation, ±3mV max input offset voltage at 25°C, and 1.2MHz gain-bandwidth product. It serves as a precision signal conditioning and sensor interface IC in power supply feedback loops and analog front-ends.
For engineers reviewing the LM324KPW datasheet, LM324KPW pinout, LM324KPW application, or LM324KPW equivalent, this page delivers verified electrical specs, validated 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 LM324KPW 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 150mV of V– at 1mA load. Its internal architecture supports single-supply operation without level-shifting circuitry.
It integrates EMI/RF filtering and achieves 2kV HBM ESD rating, enabling direct use in electrically noisy environments such as indoor air conditioners and uninterruptible power supplies where transient immunity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial power rails and battery-backed systems without external regulators |
| Input Offset Voltage (max) | ±3mV at 25°C - enables accurate DC-coupled amplification in sensor signal chains with ≤0.3% initial error |
| Gain-Bandwidth Product | 1.2MHz - sufficient for closed-loop gain ≤100 at 10kHz, suitable for motor control feedback and PSU error amplifiers |
| Quiescent Current per Amp | 240µA typical - allows four-channel operation under 1mA total, ideal for low-power embedded monitoring |
| Common-Mode Input Range | V– to (V+) – 1.5V - permits direct ground-referenced input sensing in single-supply configurations |
| Output Swing (V– side) | 150mV above V– at 1mA - ensures compatibility with microcontroller ADC reference thresholds down to 0.3V |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for system-level robustness in factory automation equipment |
Pinout & Package
TSSOP-14 (PW) package: 5mm × 6.4mm body, 0.65mm pitch, exposed pad not electrically connected; compatible with standard reflow profiles and space-constrained PCB layouts.
| 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) | Output | Drives loads up to 1mA within 150mV of V– and 1.5V of 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 no internal coupling with other inputs |
| 2OUT (Pin 7) | Output | Independent output stage; capable of sourcing/sinking ±20mA short-circuit current |
| VCC– (Pin 11) | Negative supply / ground | Reference node for single-supply operation; must be tied to system ground or negative rail |
| 3IN– (Pin 9) | Inverting input | Feedback path for amplifier C; supports differential input configurations |
| 3IN+ (Pin 10) | Non-inverting input | Signal input for amplifier C; CMRR ≥65dB ensures noise rejection in shared-bus systems |
| 3OUT (Pin 8) | Output | Third channel output; settles to 0.1% in 4µs with 100pF capacitive load |
| 4IN– (Pin 13) | Inverting input | Feedback terminal for amplifier D; validated for continuous drive up to supply voltage |
| 4IN+ (Pin 12) | Non-inverting input | High-impedance input (4GΩ || 1.5pF) minimizes loading on high-Z sources like thermistors |
| 4OUT (Pin 14) | Output | Final channel output; maintains phase margin ≥56° at unity gain with 20pF load |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Enables direct connection of ground-referenced sensors without level-shifting components |
| Integrated EMI/RF filter | Reduces susceptibility to 30–1000MHz noise in switching power supply environments |
| 2kV HBM ESD rating | Eliminates need for external TVS diodes in assembly-line handling and field deployment |
| Low quiescent current (240µA/amp) | Supports always-on monitoring circuits with <1mA total supply draw across all four amps |
| Unity-gain stable | Permits direct use in voltage followers and active filters without external compensation |
Applications
| Power Supply Feedback Loop | Multi-Function Printer Sensor Interface |
|---|---|
Use Scenario: Regulating output voltage in 12V/24V AC-DC adapters using optocoupler-isolated feedback. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference; drives optocoupler LED via configured gain. Use Value: ±3mV offset ensures ≤0.025% regulation error at 12V; 1.2MHz GBW supports fast transient response to load steps. | Use Scenario: Conditioning paper jam detection signals from photointerrupters in laser printer paper paths. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier converting photodiode current to voltage. Use Value: V–-to-rail input allows direct connection to grounded photodiode cathode; 240µA quiescent current extends standby battery life. |
| Indoor Air Conditioner Control Board | Uninterruptible Power Supply (UPS) Battery Monitor |
Use Scenario: Amplifying temperature readings from NTC thermistors mounted on evaporator coils. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with fixed gain of 10 for ADC input scaling. Use Value: 65dB CMRR rejects common-mode noise from nearby compressor drivers; 2kV ESD withstands HVAC EMI. | Use Scenario: Monitoring individual 12V lead-acid cell voltages during charging/discharging cycles. IC Role / Device Role / Timing Role: Four-channel differential voltage monitor comparing each cell to reference. Use Value: Four independent amps enable simultaneous cell measurement without multiplexing delay; 36V max supply covers full string voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324BQPWR | B-version with ±2mV max offset (BA), 240µA IQ, same PW package | Higher precision required in medical sensor front-ends where 1mV offset reduction matters | Select LM324BQPWR when offset drift <±7μV/°C and extended temp range (–40°C to +125°C) are mandatory |
| LM2902PW | Same pinout, 3V–26V supply, ±7mV max offset, 0°C–70°C rating | Legacy designs constrained by older spec limits and commercial temp grade | Choose LM2902PW only for cost-optimized consumer products where 7mV offset and narrower temp range are acceptable |
Compared with LM324KPW, LM324BQPWR offers tighter offset and wider temperature range but identical footprint and drive capability, while LM2902PW trades precision and ruggedness for lower unit cost in non-industrial settings.
Availability
LM324KPW is available at Aetrix Electronics and suitable for AC inverters, multi-function printers, and uninterruptible power supplies requiring stable component supply across long production lifecycles.
Supply support for LM324KPW 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 cost-sensitive, high-reliability analog signal conditioning in industrial power systems and consumer appliances-prioritizing wide supply range, rail-compatible inputs, and robust ESD performance over ultra-low noise or speed.
FAQ
What is the maximum operating temperature range for the LM324KPW?
The LM324KPW is rated for operation from –40°C to +85°C ambient temperature, matching the commercial-industrial grade specification of the LM324B series. This range is validated per TI's SLOS066AE datasheet Section 6.3 and supports deployment in indoor air conditioners and industrial control panels where enclosure temperatures remain below 85°C.
Does the LM324KPW support true rail-to-rail output swing?
No, the LM324KPW does not provide rail-to-rail output. Its output swings to within 1.5V of V+ and 150mV of V– at 1mA load, as specified in Section 6.5 of the datasheet. For applications requiring closer-to-rail output, consider the LM324BQPWR variant or newer rail-to-rail op-amps like the TLV2464.
Can the LM324KPW be used with a single 5V supply?
Yes, the LM324KPW operates reliably from a single 5V supply, with guaranteed functionality across its full input common-mode range (0V to 3.5V) and output swing (0.15V to 3.5V). This makes it suitable for 5V microcontroller-based systems such as printer logic boards and UPS status monitors.
Is the LM324KPW pin-compatible with the LM324N (PDIP-14)?
No-while both contain identical amplifier functionality, the LM324KPW uses a 14-pin TSSOP (PW) package with 0.65mm pitch and different pin mapping than the 14-pin PDIP (N) package. Physical replacement requires PCB redesign; however, the electrical behavior and pin functions (e.g., Pin 1 = 1OUT, Pin 4 = VCC+) are consistent across all LM324 variants per Figure 5-1.
What is the typical input bias current of the LM324KPW at 25°C?
The typical input bias current of the LM324KPW is –10nA at 25°C, with a maximum of –35nA across the full operating temperature range (–40°C to +85°C), as documented in Section 6.5 of the TI SLOS066AE datasheet. This low bias current minimizes voltage errors when driving high-impedance sources like thermistors or pH electrodes.
LM324KPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
LM324KPW FAQ
1.How can I place an order for LM324KPW through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324KPW 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 LM324KPW reliable?
The price and inventory of LM324KPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324KPW is usually 5 days.
3.What payment methods are accepted for LM324KPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324KPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324KPW?
LM324KPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324KPW 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 LM324KPW?
For technical support, including LM324KPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324KPW requirements.
6.How does Aetrix verify that LM324KPW is sourced from the original manufacturer or authorized distributors?
All LM324KPW 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 LM324KPW meets industry standards.
7.What is the process for return or replacement of LM324KPW?
All LM324KPW units undergo pre-shipment inspection (PSI). If there is an issue with LM324KPW, 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 LM324KPW part is unused and in its original packaging.
Return procedure for LM324KPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324KPW 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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