Texas Instruments LM324KAPWR

Overview

LM324KAPWR from Texas Instruments is a quad operational amplifier in 14-pin TSSOP 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 typical quiescent current per amplifier - enabling precision signal conditioning in power supplies, industrial controls, and consumer appliances.

For engineers reviewing the LM324KAPWR datasheet, LM324KAPWR pinout, LM324KAPWR application, or LM324KAPWR equivalent, this page provides 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 LM324KAPWR 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 1.5 V of V+ and 100 mV of V– under light load. Its internal architecture supports operation from 3 V to 36 V supply, with ESD protection rated at 2 kV HBM and integrated RF/EMI filtering for robustness in electrically noisy environments.

Unlike earlier LM324 variants, the K-suffix indicates a specific temperature-grade and packaging variant (TSSOP-14) with guaranteed performance across 0°C to 70°C ambient, matching the LM324K family's specification set - including 7 mV max input offset voltage, 25 V/mV min open-loop gain, and 120 dB channel separation at 1–20 kHz.

Key Specifications

Pinout & Package

Packaged in a 14-pin TSSOP (PW), the LM324KAPWR measures 5 mm × 6.4 mm with exposed pad thermal enhancement. Pin numbering follows standard top-view orientation with pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad op-amp applications.

Compared with LM324KAPWR, LM324PWR offers improved DC precision and ESD tolerance in the same footprint, while LM2902KAV trades package size for extended temperature capability and broader industrial qualification - making it preferable for harsh-environment deployments where long-term parametric drift matters more than board area.

Availability

LM324KAPWR is available at Aetrix Electronics and suitable for power supplies, multi-function printers, and indoor air conditioners requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for LM324KAPWR 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-amps and industrial-grade signal chain components.

The LM324K series belongs to TI's legacy high-voltage op-amp portfolio, engineered for cost-effective, reliable amplification in consumer, industrial, and computing applications - emphasizing ease of use, wide supply flexibility, and proven field reliability.

FAQ

What is the maximum operating temperature range for LM324KAPWR?

The LM324KAPWR is specified for operation from 0°C to +70°C ambient temperature. This range is defined in the device's Recommended Operating Conditions table and applies across its full supply voltage range (3 V to 30 V). The K-suffix explicitly denotes this commercial-grade temperature specification, distinguishing it from automotive (–40°C to +125°C) or military (–55°C to +125°C) variants. Thermal derating is not required within this envelope.

Does LM324KAPWR support rail-to-rail output swing?

No, LM324KAPWR does not provide rail-to-rail output swing. Its output can swing to within 1.5 V of V+ and 100 mV of V– under light load (50 µA), degrading to ~1.75 V from V+ and ~1 V from V– at 5 mA sink/source. This limitation is inherent to its bipolar input/output architecture. For true rail-to-rail output, consider TI's TLV2464 or similar CMOS alternatives - but note that LM324KAPWR's output drive and voltage range remain sufficient for most industrial comparator and buffer roles.

Can LM324KAPWR replace LM324DR in an existing design?

Yes, LM324KAPWR can replace LM324DR if the design accommodates the TSSOP-14 package and operates within 0°C to +70°C. Both share identical electrical specifications (±7 mV offset, 1.2 MHz GBW, same pinout), but LM324KAPWR uses a smaller 5 mm × 6.4 mm TSSOP versus SOIC-14's 8.65 mm × 6 mm. Layout changes are required for footprint and thermal pad clearance; no schematic modification is needed. Verify solder reflow profile compatibility with TSSOP's finer pitch.

What is the input bias current specification for LM324KAPWR?

The input bias current for LM324KAPWR is specified as –20 nA to –250 nA at 25°C, with a maximum of –500 nA across its full 0°C to +70°C operating range. This bipolar-input characteristic means bias current flows *into* the inputs, requiring matched source impedances on inverting and non-inverting nodes to minimize offset voltage contribution. At elevated temperatures, bias current increases significantly - a key consideration in high-precision DC-coupled sensor interfaces.

Is LM324KAPWR RoHS compliant and lead-free?

Yes, LM324KAPWR is RoHS compliant and lead-free. Texas Instruments certifies this part as meeting JEDEC J-STD-609 Category 3 marking requirements for lead-free terminations, with SnAgCu (SAC305) solder finish. The PW suffix explicitly denotes the RoHS-compliant TSSOP package. No exemptions apply, and the device conforms to EU Directive 2011/65/EU and China RoHS II standards - confirmed in TI's official packaging and environmental compliance documentation.